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Computational Mechanics IEEE PAPER



High-order compact finite difference schemes for computational mechanics
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Finite difference methods have long been used to approximate the solution of ordinary or partial differential equations (PDEs). These methods involve discretizing the domain of interest into a structured mesh of grid points and approximating derivatives by difference Numerical simulation of contact mechanics problems has been one of the research topics of main interest over the last decades. Contact mechanics problems arises in many application fields in both mechanical and civil engineering, such as crashworthiness, projectile impact

On strategies for tracking strong discontinuities in computational failure mechanics
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Abstract The work deals with the strategies for tracking displacement jumps (strong discontinuities) in computational failure mechanics in the context of finite elements with embedded discontinuities. As an alternative to classical strategies, based on the spatial

Method of movable cellular automata as a new trend of discrete computational mechanics. I. Theoretical description
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Mechanics in the most general sense is the science that treats of motion. An object to be described can be represented as some continuum or multitude of interacting particles (elements of a medium). These approaches were suggested

An overview of the PTC 60/VV 10: guide for verification and validation in computational solid mechanics
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The American Society of Mechanical Engineers (ASME) Standards Committee on Verification and Validation in Computational Solid Mechanics (PTC 60/VV 10) approved their first document (Guide) in July 2006. The Guide has been approved by ASME and the Within the last years, computational contact mechanics has been a topic of intense research. The aim of the development is to devise robust solution schemes and new discretization techniques that can be applied to different problem classes. These are wide ranging and

Computational contact mechanics
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Contact mechanics has its application in many engineering problems. No one can walk without frictional contact, and no car would move for the same reason. Hence contact mechanics has, from an engineering point of view, a long history, beginning in ancient

Dynamic mesh partitioning and load-balancing for parallel computational mechanics codes
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Abstract We discuss the load-balancing issues arising in parallel mesh based computational mechanics codes for which the processor loading changes during the run. We briefly touch on geometric repartitioning ideas and then focus on different ways of using a graph both to

Computational mechanics of classical spin systems
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The two spin mutual information I (r) defined in in the context of a one- dimensional spin system can easily be extended to measure the information shared

Computational Geometry, Fluid Mechanics, Computer Vision And Materials Sciences
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Cambridge University Press 978-0-521-64557-7 Level Set Methods and Fast Marching Methods: Evolving Interfaces in Computational Geometry, Fluid Mechanics, Computer 6.1 Introduction. The intent of this paper is to give a limited review of finite-difference numerical solution methods which have been developed to handle problems of nonlinear stress wave propagation. Such problems arise, for example, in situations involving impact A number of special issues of this journal on computational fluid mechanics and fluid– structure interaction (FSI) were published in the past fiveyears. These special issues were very successful in terms of the kind of articles included and the attention those articles This special issue contains a selection of invited, full- length, refereed manuscripts from the Special Symposium on Computational Mechanics, held in Sydney, Australia on 21st February 2004. The symposium was dedicated to Professor Valliappan on the occasion of his retirement This special issue is a collection of the papers contrib- uted by authors who were invited to speak at the sympo- sium on Advances in Computational Fluid

Preface: International Workshop on Development and Advancement of Computational Mechanics, April 22-23, 2005
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The International Workshop on Development and Advancement of Computational Mechanics was held in Kobe, Japan. is a distinguished and world-renowned The assessment of uncertainty, either induced by uncertain parameters or uncertain models, is one of the emerging fields in computational modelling. Traditional means of assessing uncertainty are based on stochastics and an extensive methodology has been developed

Occam learning through pattern discovery: computational mechanics in AI systems
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Abstract-The push for real-time autonomous AI systems has been sought for decades. The DoD has spent considerable RD budgets looking for systems that can operate with no or little supervision. These systems must process incredible amounts of heterogeneous

A strategy for mapping unstructured mesh computational mechanics programs onto distributed memory parallel architectures
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Lecture notes in applied and computational mechanics
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This book collects some papers dealing with actual Civil Engineering problems. The approach is in the line of the Italian-French school and therefore deeply couples mechanics and mathematics creating new predictive theories, enhancing clarity in understanding,

Computational mechanics simulation for clinical cardiovascular medicine
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Computational mechanics of modeling strategies at different scales
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The paper addresses various scale-bridging modeling and discretization strategies for multiphase porous materials, starting with a micromechanics model for ion transport within the pore space to generate homogenized diffusion coefficients. Using homogenized

Computational damage mechanics for composite materials based on mathematical homogenization
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Abstract This paper is aimed at developing a nonlocal theory for obtaining numerical approximation to a boundary value problem describing damage phenomena in a brittle composite material. The mathematical homogenization method based on double scale

Geometric methods and computational mechanics for the design of stone domes based on Abeille's bond
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We present an automatic procedure that, starting from fit design parameters, defines the geometry of stone vaults of a particular class and tests their mechanical performances. The considered vaults are spherical, but bonded adapting Abeille's 1699 design for flat vaults, The computational mechanics of composite materials is a new branch in the mechanics of solids which uses comput- ers for solving a given problem with a given precision. The process of obtaining a solution is arbitrarily divided into several stages. Each stage, its idealized model, and

Configurational forces in defect mechanics and in computational methods
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2.1 General comments Introduction of the Eshelby stress Balance of configurational forces Gradient of the Lagrange function Inverse motion 15 2.3. 3 Invariance property of the energy equation Noether's theorem

Corrected Smooth Particle Hydrodynamics A Meshless Method for Computational Mechanics
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Abstract. This paper presents several advances in the Smooth Particle Hydrodynamics (SPH)[1, 2] method with its applications in numerical simulations of fluid and solid mechanics problems. The authors have developed Corrected Smooth Particle

Adaptive modeling in computational mechanics
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Abstract. We review and extend the theory and methodology of a posteriori error estimation and adaptivity for modeling error for certain classes of problems in linear and nonlinear mechanics. Keywords: Nonlinear continuum mechanics, hierarchical modeling, a

Problems of computational mechanics relate to finite-element analysis of structural constructions
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ABSTRACT The problems of computational mechanics, concerning with application of finite element analysis to structural constructions, are discussed. Our attention is addressed to medium-class software for personal computers with which structural constructions are

A computational mechanics model for the brim forming process in paperboard container manufacturing
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Paperboard material is widely used in various applications ranging from food packaging to load bearing structures. Paperboard is generally manufactured in a sheet form and subsequently converted by various manufacturing operations analogous to sheet metal

Civil Engineers Engineering and Computational Mechanics 163 September 2010 Issue EM3
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This paper discusses the practical and technical differences between the usual form of experimental modal analysis (EMA) and operational modal analysis (OMA), as applied to Gothic-style masonry vaulted structures. In situ vibration measurements were collected

Computational materials science: the era of applied quantum mechanics
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For many centuries, mate-rials were discovered, mined, and processed in a largely serendipitous way. However, the characterization of the atom and the progress made in x- ray diffraction during the early years of this century started a quest for a theory of materials

Stochastic computational mechanics of quasibrittle structures
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Loading conditions, material properties, geometry and several other parameters often show considerable variability, since they are stochastic quantities in nature. The rational treatment of uncertainties in computational mechanics, based on statistical and probabilistic

Development of the next-generation computational solid mechanics simulator for a virtual demonstration test
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We have been developing an advanced general purpose computational mechanics system, named ADVENTURE, which is designed to be able to analyze a three dimensional finite element model of arbitrary shape with a 10-100 million degrees of freedom (DOF) mesh.

Computational fluid and solid mechanics
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Now, when all these studies reach the point of inter-communication and connection with one another and come to be considered in their mutual affinities, then, I think, but not until then,

An Interactive Framework for Meshless Methods Analysis In Computational MechanicsAnd Thermofluids
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ABSTRACT In recent history, the area of physics-based engineering simulation has seen rapid increases in both computer workstation performance as well as common model complexity, both driven largely in part by advances in memory density and availability of

COMPUTATIONAL MODELLING OF IMPACT TESTS ON STEEL FIBRE REINFORCED CONCRETE BEAMS. COMPUTATIONAL MECHANICS OF COMPOSITE
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Abstract Concrete fracture under impact loading is modelled using rate-independent and rate-dependent smeared crack representations. Both models have been used to simulate the behaviour of concrete beams with both conventional and steel-fibre reinforcement.

Computational nano-mechanics and multi-scale simulation
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Abstract: This article provides a review of the computational nanomechanics, from the ab initio methods to classical molecular dynamics simulations, and multitemporal and spatial scale simulations. The recent improvements and developments are briefly discussed.

Advances in computational mechanics via graph theory
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ABSTRACT The aim of the present work is two fold. In one hand it shows to mathematicians how the apparently pure mathematical concepts can be applied to the efficient solution of problems in structural mechanics. In the other hand it illustrates to engineers the important

Variational time integrators in computational solid mechanics
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Abstract This thesis develops the theory and implementation of variational integrators for computational solid mechanics problems, and to some extent, for fluid mechanics problems as well. Variational integrators for finite dimensional mechanical systems are succinctly

A mechanics based computational platform for pavement engineering
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Chapter 4: Elastoplasticity 4.1 Elementary Model of Elastoplastic Response 4.2 Three Dimensional Elastoplastic Model 4.2. 1 Constitutive Framework 4.2. 2 Hardening Response 4.2. 3 Response Degradation 4.3 Material Parameter Determination 4.3. 1 Hardening

An Interactive Clinical Interface for MR Image-Based Computational Mechanics Modeling of the Human Cardiovascular System
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There are three major steps in a computational biomechanics simulation: modeling, computation, and visualization. Of these, everyone would agree that modeling is the initial and most crucial of the steps. Using computational mechanics modeling for clinical

State-of-the-art Surveys on Computational Mechanics
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ABSTRACT A general survey of grid generation is presented with a concern for understanding why grids are necessary, how they are applied, and how they are generated. After an examination of the need for such meshes, the overall applications setting is

Numerical studies of Vanka-type smoothers in computational solid mechanics
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Abstract. In this paper multigrid smoothers of Vanka-type are studied in the context of Computational Solid Mechanics (CSM). These smoothers were originally developed to solve saddle-point systems arising in the field of Computational Fluid Dynamics (CFD),

Xeon phi performance for hpc-based computational mechanics codes
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In this paper we describe different applications we have ported to Intel Xeon Phi architectures, analyzing their performance. The applications cover a wide range. Alya, which is an HPC-based multi-physics code for parallel computers capable of solving coupled The ultimate aspiration of this book is to promote the application of computational cardiovascular mechanics models to clinical medicine. Patient-specific computational models can aid medical diagnosis and help design optimal treatment for cardiovascular

Efficient parallel solution methods for mortar finite element discretizations in computationalcontact mechanics
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The past decade has seen a great thrust of research activities on new robust discretization schemes and efficient solution algorithms for computational contact mechanics. Mortar finite element discretizations are now commonly accepted as state-of-the-art approach with

Computational aspects of probability in non-linear mechanics
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Abstract Some ways on how probabilistic aspects may enter non-linear mechanics, and how this may be treated numerically are described. Deterministic systems with stochastic excitation are well known, and here the emphasis is on uncertain systems, where the

The review of computational FE software for creep damage mechanics
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Guide for Verification and Validation in Computational Solid Mechanics, 1st ed. The American Society of Mechanical Engineers Standard Committee, USA.

On the (Meshless Local Petrov-Galerkin) MLPG-Eshelby Method in Computational Finite Deformation Solid Mechanics-Part II
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Abstract: This paper presents a new method for the computational mechanics of large strain deformations of solids, as a fundamental departure from the currently popular finite element methods (FEM). The currently widely popular primal FEM:(1) uses element-based

Computational mechanics of diseased arteries-MR imaging and layer-specific 3D modeling
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We have developed a 3D model for eight distinct arterial components associated with specific mechanical responses [1]. The 3D geometrical model is based on in vitro MRI of a human stenotic post-mortem artery and is represented by NURBS surfaces. Mechanical

Computational mechanics and earthquake engineering
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ABSTRACT: Computational methods capable of dealing with non linear, dynamic, soil- fluid interaction problems are becoming an essential tool for safe design of structures subjected to Earthquakes. The oversimplified methods involving assumptions of linear

Maximum entropy principle for stochastic models in computational mechanics
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Page 1. 1 Maximum entropy principle for stochastic models in computationalmechanics Christian MOTIVATION THE USE OF THE PROBABILITY THEORY TO MODEL UNCERTAINTIES IN COMPUTATIONALMECHANICS Page 3. 4

Simple concepts in computational mechanics do they really work
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Abstract The aim of this paper is to present some of simple concepts introduced by the author. The author has found, after decades of work in computational mechanics, that it is (almost always) true that the simpler concept the more robust and attractive methodology

Computational methods in contact mechanics IV
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Abstract A two-zone rnicroslip theory was used to study cylinder rolling contact. The theory was validated by experiment-The esperimental study involved direct strain-gage measurements in the contact area of the rolling cylinders. The state of strain in the wheel-'

Fixed mesh methods in computational mechanics
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Abstract In many coupled problems of practical interest the domain of at least one of the problems evolves in time. The Arbitrary Eulerian Lagrangian (ALE) approach is a tool very often employed to cope with this domain motion. However, in this work we aim at

Analysis of explicit finite difference methods used in computational fluid mechanics
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1. INTRODUCTION It is now commonplace to simulate fluid motion by numerically solving the governing partial differential equations on high speed digital computers. Finite difference techniques, because of their relative simplicity and their long history of successful

Computational fracture mechanics of concrete structures: a retrospective through multiple lenses
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ABSTRACT: The history of the application of computational fracture mechanics to concrete structures, now 5 decades old, is interesting from many perspectives. In this paper, a retrospective of computational fracture mechanics in concrete structures (ComFraMCoS)

How can computational weld mechanics help industry
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Goal: To deliver a product that meets flatness specifications while minimizing fabrication costs. Due to their geometry, these weld joints require a high amount of labor to weld, rework, and flame straighten. This is especially acute when mechanical pressing is not

in Finite Deformation Anisotropic Hyperelastic Solid Defect Mechanics, and the MLPG-Eshelby Method in Computational Finite Deformation Solid Mechanics-
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Abstract: The concept of a stress tensor plays a central role in Newtonian continuum

Computational bone mechanics to determine bone strength of the human radius
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Fractures in the distal radius are amongst the most common in humans. Their incidence is increasing due to an aging population leading to a higher percentage of osteoporotic patients with an increased risk of forearm fractures. Hence, an accurate prediction of bone

Computational solid mechanics using a vertex-based finite volume method
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(FV) methods for computational solid mechanics (CSM). These methods are proving to be equivalent and in some cases superior to their nite element (FE) counterparts. In this paper we will describe a vertex-based FV method with arbitrarily structured meshes, for

Computational experiment in the mechanics of materials
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Abstract A computational approach to the optimization of fracture resistance of multiphase materials (here-high speed steels) by varying their microstructure is presented. The main points of the optimization of steels are as folIows:(1) development and verification of the In this book, modern methods of analytical mechanics and nonlinear control are highlighted. A special attention is paid to the problems of exploiting symbolic computational techniques. All relevant theoretical results are collected and logically arranged. The authors try to

Concepts and Terminology of Validation for Computational Solid Mechanics Models
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ABSTRACT During the past couple of years, a committee under the auspices of the ASME Codes and Standards division has been formed and are meeting regularly. The purpose of the committee is to develop and publish a set of documents that describe a common

A Computational Model of Phase Transformation for Welding Processes (Mechanics, Strength Structural Design)
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Abstract A new computational model of phase transformation for welding processes is developed. In this model, the SH-CCT diagram is used to decide when the phase transformations start, while the TTT diagram is used to calculate the fraction of the new

Verification in computational structural mechanics: recovery-based a posteriori error estimation
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Abstract: Nowadays the combination of this powerful modern computers with effective numerical procedures, particularly finite element method, have transformed what were once purely qualitative theories of mechanics and physics into effective bases for simulation of

The challenge of computational Mechanics
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The honour of being today the recipient of the Gauss medal I take not only as a personal appreciation for which I am grateful, but as recognition of the importance of the subject of Computational Mechanics in modern engineering. Since the foundation of mechanics

Microelectromechanical systems and nanomaterials: Experimental and computational mechanics aspects
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Micro electro mechanical systems (MEMS) and nanomaterials are two emerging technologies of impor- tance in society. MEMS are currently used in avariety of applications, such as air bag deployment sensors, gyroscopes for airplane and space navigation, radio frequency (RF)

CE 233 Computational Mechanics
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Homework will be assigned along the course, involving theoretical and programming assignments. We will use FEAP (Finite Element Analysis Program) No late homework will be admitted. Assignments must be developed and submitted individually. Solution sets, class

Computational Mechanics of a Coupled Flow-Structure Interaction Problem with Applications to Bio-Inspired Micro Air Vehicles
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Abstract Micro Air Vehicles (MAVs) are small flying vehicles that are designed to fit certain size and weight constraints. MAVs are important because they have a variety of practical applications, including surveillance and weather imaging. MAVs fall into two major

Computational quantum mechanics-based study of conduction in iodine doped polyethylene
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Abstract-Interaction between iodine and polyethylene relevant to conduction has been studied through the use of density functional theory. The interaction between I2 and polyethylene was characterized on an atomic level, and the role of I2 in linking the

Computational Quantum Mechanics Simulation on the Photonic Properties of Group-III Nitride Clusters
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Abstract: This paper describes the quantum mechanical simulation on the photonic properties of group-III nitride clusters, whose bulk types are common materials for light emitting diodes (LEDs). In order to emit different colors of light using the same

Civil Engineers Engineering and Computational Mechanics 163 September 2010 Issue EM3
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During the last 10 years UK engineering consultancy Gifford has been assessing masonry arch bridges and using the finite/discrete-element method to predict their structural behaviour. In the majority of cases this work has followed bridge strength assessments

Techniques for High-Performance distributed computing in computational fluid mechanics
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Among many parallel computational models, message-passing has proven to be an effective one. This paradigm is specially suited for (but not limited to) distributed memory architectures. Although there are many variations, the basic concept of processes

Application of computational fluid mechanics for protection cloth design
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Abstract. The paper presents three samples of CFD application for design of cloth protecting from high and low temperatures with and without incident flow. Inner human body thermodynamics as well as the interaction of human body with surrounding media are

Computational mechanics of molecular systems
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A framework that connects Computational Mechanics and molecular dynamics has been developed and described. As the key part of the framework the problem of symbolising molecular trajectory and the associated interrelation between microscopic phase space

COMPUTATIONAL MECHANICS I
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These course have been written for the students in the 4th year (1st year of 2nd stage) on the faculty of mechanical engineering, specialization Computer Mechanics I. In general, the text may be used for all students studying the theory of vibrations. Numerical analysis has

Computational Contact Mechanics
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Abstract Contact Mechanics is one of the most growing research fields in Mechanics. This is due to the refinement of modeling engineering structures and processes where the complexity of contact constraints is now often taken into account in order to obtain

Computational fracture mechanics for composites
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Page 1. COMPUTATIONAL FRACTURE MECHANICS FOR COMPOSITES STATE OF THE ART AND CHALLENGES Ronald Krueger NIA Senior Staff Scientist CAA/FAA Workshop on Adhesive Bonding, Gatwick, UK, October 2004 Page 2. ACKNOWLEDGEMENTS

Computational explosion mechanics and related progress
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Explosion mechanics is the theoretical basis for the design of highly efficient arms and ammunition and industrial explosion safety. Because it involves the complex physical and mechanical behaviors of multi-materials under extreme conditions, such as high speed,

Stochastic computational mechanics Lecture notes
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Probabilities are used in game theory, statistical physics, economy, risk analysis and are not always given the same meaning. On the first hand a physicist favours the experimental point

Computational Weld Mechanics and Optimization of Welding Procedures, Welds and Welded Structures
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Progress towards integrating computational optimization with Computational Weld Mechanics (CWM) is presented. Optimization requires evaluating a large number of CWM problems. To be practical, the computing time for the CWM must be short and the time to

Computational approach to the mechanics of entangled materials
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Abstract: We employ a discrete simulation adapted from molecular dynamics techniques in order to study the mechanics of entangled semiflexible fibres. A previous model represent a fibre as a" pearl necklace"[Rodney et al.(2005)]. Successive configurations are obtained

Finite element modeling and experimental validation of computational procedures for a fracture mechanics based bone test method
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Bone has a highly hierarchical structure and the bone quality may be affected by factors at different length scales [1, 2]. Several researchers have proposed novel test methods for determining bone properties at Macro [3-7] and Micro/Nano length scales [1, 2, 8] for

Refining a bottom-up computational approach for spider silk fibre mechanics
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Abstract. Spider silk has attracted the attention of many scientists due to its combination of high strength, ductility, and light weight. Spider silk has a semi crystalline structure consisting of stiff sheet crystals surrounded by amorphous glycine-rich domains. We present an

A computational method for thermoviscoelasticity with applications to rock mechanics
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Thermomechanics is concerned in general with the interrelations between the forces acting on a continuum and the resulting time and temperature dependent kinematical deformations. For thermoelastic materials, the deformation response is fully recoverable The demand for computational methods in the: field of nonlinear mechanics is evident. Whereas in linear problems of practical importance the use of the computer is justified by the complexity of the domain, in the nonlinear case complicated tasks may originate from the

Application of computational fracture mechanics to repair of large concrete structures
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Abstract Computational linear elastic fracture mechanics can be used relatively large concrete structures as a quantitative guide in: forensic engineering: the use as a primary diagnostic tool determining the cause of cracking; repair of cracked structure: the use in

Computational predictions of improved of wall mechanics and function of the infarcted left ventricle at early and late remodelling stages: comparison of layered
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Abstract. Acellular intra-myocardial biomaterial injections have been shown to be therapeutically beneficial in inhibiting ventricular remodelling of myocardial infarction (MI). Based on a biventricular canine cardiac geometry, various finite element models were

An Introduction to Numerical Analysis for Computational Fluid Mechanics
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NOTICE: This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government, nor any agency thereof, nor any of their employees, nor any of their contractors, subcontractors, or their employees

COMPUTaTIOnal aEROaCOUSTICS USInG MPCCI aS COUPlInG InTERFaCE bETwEEn FlUIdMECHanICS, STRUCTURal MECHanICS and aCOUSTICS
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This paper describes a coupling scheme for the simulation of flow induced sound based on fluid-acoustic and fluid-structure-acoustic interactions. A direct coupling between the flow field and the acoustic field is performed in the time domain by applying Lighthill's acoustic

Computational Weld Mechanics (CWM) Framework for Exploring Parametric Design Space to Manage Weld Optimization
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Abstract The goal is to lead the development of a computational weld mechanics (CWM) framework that automates multiple setups and evaluations required to explore a design space by given design of experiment (DOE) matrices. Saving an expert-user's time to

Development of a process and toolset to study UCAV flight mechanics using computational fluid dynamics
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Abstract The work carried out during this project used a Computational Fluid Dynamics code to generate aerodynamic tabular models and aircraft manoeuvre simulations. As an outcome of this work, a validation of the aerodynamic prediction tools and an assessment


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