Modeling Contacts in a Physically Based Simulation PDF Download
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Author: William J. Bouma
Publisher:
ISBN:
Category : Computer-aided design
Languages : en
Pages : 18
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Book Description
We then address the geometric issues in contact analysis and present the model for contact. Since the objects can be nonconvex, the contact can be quite complex geometrically; a complete set-theoretic intersection is computed and its results analyzed. Finally we show how a robust and efficient implementation can be achieved using the brep-index data structure."
Author: William J. Bouma
Publisher:
ISBN:
Category : Computer-aided design
Languages : en
Pages : 18
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Book Description
We then address the geometric issues in contact analysis and present the model for contact. Since the objects can be nonconvex, the contact can be quite complex geometrically; a complete set-theoretic intersection is computed and its results analyzed. Finally we show how a robust and efficient implementation can be achieved using the brep-index data structure."
Author: Riccardo Sacco
Publisher: Academic Press
ISBN: 0128125195
Category : Technology & Engineering
Languages : en
Pages : 854
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Book Description
A Comprehensive Physically Based Approach to Modeling in Bioengineering and Life Sciences provides a systematic methodology to the formulation of problems in biomedical engineering and the life sciences through the adoption of mathematical models based on physical principles, such as the conservation of mass, electric charge, momentum, and energy. It then teaches how to translate the mathematical formulation into a numerical algorithm that is implementable on a computer. The book employs computational models as synthesized tools for the investigation, quantification, verification, and comparison of different conjectures or scenarios of the behavior of a given compartment of the human body under physiological and pathological conditions. Presents theoretical (modeling), biological (experimental), and computational (simulation) perspectives Features examples, exercises, and MATLAB codes for further reader involvement Covers basic and advanced functional and computational techniques throughout the book
Author: Ronen Barzel
Publisher: Morgan Kaufmann
ISBN: 0080916449
Category : Computers
Languages : en
Pages : 359
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Book Description
Physically-Based Modeling for Computer Graphics: A Structured Approach addresses the challenge of designing and managing the complexity of physically-based models. This book will be of interest to researchers, computer graphics practitioners, mathematicians, engineers, animators, software developers and those interested in computer implementation and simulation of mathematical models. Presents a philosophy and terminology for "Structured Modeling" Includes mathematicl and programming techniques to support and implement the methodology Covers a library of model components, including rigid-body kinematics, rigid-body dynamics, and force-based constraint methods Includes illustrations of several ample models created from these components Foreword by Al Barr
Author: Donald House
Publisher: CRC Press
ISBN: 1482234610
Category : Computers
Languages : en
Pages : 405
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Book Description
Physics forms the basis for many of the motions and behaviors seen in both the real world and in the virtual worlds of animated films, visual effects, and computer games. By describing the underlying physical principles and then creating simulations based on these principles, these computer-generated worlds are brought to life. Physically Based Modeling and Animation goes behind the scenes of computer animation and details the mathematical and algorithmic foundations that are used to determine the behavior underlying the movement of virtual objects and materials. Dr. Donald House and Dr. John Keyser offer an approachable, hands-on view of the equations and programming that form the foundations of this field. They guide readers from the beginnings of modeling and simulation to more advanced techniques, enabling them to master what they need to know in order to understand and create their own animations Emphasizes the underlying concepts of the field, and is not tied to any particular software package, language, or API. Develops concepts in mathematics, physics, numerical methods, and software design in a highly integrated way, enhancing both motivation and understanding. Progressively develops the material over the book, starting from very basic techniques, and building on these to introduce topics of increasing complexity. Motivates the topics by tying the underlying physical and mathematical techniques directly to applications in computer animation.
Author: Andreas Schenk
Publisher: Springer Science & Business Media
ISBN: 9783211830529
Category : Technology & Engineering
Languages : en
Pages : 384
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Book Description
From the reviews: "... this is a well produced book, written in a easy to read style, and will also be a very useful primer for someone starting out the field [...], and a useful source of reference for experienced users ..." Microelectronics Journal
Author: Charles Bouchard
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
"This thesis contains two methods that improves rigid body physically based simulations. First,we present a new approach to modeling contact between rigid objects that augments an individualCoulomb friction point-contact model with rolling and spinning friction constraints.Starting from the intersection volume, we compute a contact normal from the volume gradient.We compute a contact position from the rst moment of the intersection volume, and approximatethe extent of the contact patch from the second moment of the intersection volume. Byincorporating knowledge of the contact patch into a point contact Coulomb friction formulation,we produce a 6D constraint that provides appropriate limits on torques to accommodate displacementof the center of pressure within the contact patch, while also providing a rotationaltorque due to dry friction to resist spinning. The second method presented in this thesis isfor adaptive computation of the active joint distribution inside a cable based on local information.A heuristic computes activation criteria for all joints based on user-dened parametersby extracting the velocities and accelerations of the joints and the previous activation state. Acollection of examples demonstrates the power and the benets of both methods." --
Author: Heinze, David
Publisher: KIT Scientific Publishing
ISBN: 3731504278
Category :
Languages : en
Pages : 178
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Book Description
Author: Philipp Nicolas Depta
Publisher: Cuvillier Verlag
ISBN: 3736969724
Category :
Languages : en
Pages : 297
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Book Description
In order to improve knowledge on macromolecular structural formation and self-assembly, this work proposes a physics-based and data-driven multiscale modeling framework capable of describing structural formation on micro-meter and milli-second scales near molecular-level precision. The framework abstracts macromolecules as anisotropic unit objects and models the interactions and environment using data-driven approaches. The models are parameterized in a bottom-up fashion and validated top-down by comparison with literature and collaborator data for self-assembly of three model system: alginate gelation, hepatitis B virus capsids, and the pyruvate dehydrogenase complex.
Author: Alexander Popp
Publisher: Springer
ISBN: 3319901559
Category : Science
Languages : en
Pages : 235
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Book Description
The book conveys modern techniques and the latest state-of-the-art with regard to the most fundamental aspects of computational contact mechanics. However, since contact can readily be interpreted as a special type of interface problem, it seems advisable not to isolate contact mechanics, but rather to address it in the context of a broader class of problems denoted as computational interface mechanics. The book gives a clear understanding of the underlying physics of interfaces, and a comprehensive insight into the current state-of-the-art and selected cutting-edge research directions in the computational treatment of interface effects. It focuses on the modeling of friction, wear, lubrication, cohesive interfaces, grain boundaries, phase boundaries, fracture, thermo-mechanics and particulate contact (e.g. granular media). Also the most important computational aspects are addressed, including discretization techniques for finite deformations, solution algorithms for single- and multi-processor computing environments, multi-scale approaches, discrete element models and multi-physics problems including contact and interface constraints. Among the computational techniques covered in this book are finite element (FEM) and boundary element (BEM) methods, atomistic models, molecular dynamics (MD), discrete element methods (DEM), coupling approaches for multi-scale simulations, and tools for an efficient automated FEM code generation.
Author: Eftychios Sifakis
Publisher: Morgan & Claypool Publishers
ISBN: 162705443X
Category : Computers
Languages : en
Pages : 71
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Book Description
This book serves as a practical guide to simulation of 3D deformable solids using the Finite Element Method (FEM). It reviews a number of topics related to the theory and implementation of FEM approaches: measures of deformation, constitutive laws of nonlinear materials, tetrahedral discretizations, and model reduction techniques for real-time simulation. Simulations of deformable solids are important in many applications in computer graphics, including film special effects, computer games, and virtual surgery. The Finite Element Method has become a popular tool in many such applications. Variants of FEM catering to both offline and real-time simulation have had a mature presence in computer graphics literature. This book is designed for readers familiar with numerical simulation in computer graphics, who would like to obtain a cohesive picture of the various FEM simulation methods available, their strengths and weaknesses, and their applicability in various simulation scenarios. The book is also a practical implementation guide for the visual effects developer, offering a lean yet adequate synopsis of the underlying mathematical theory. Chapter 1 introduces the quantitative descriptions used to capture the deformation of elastic solids, the concept of strain energy, and discusses how force and stress result as a response to deformation. Chapter 2 reviews a number of constitutive models, i.e., analytical laws linking deformation to the resulting force that has successfully been used in various graphics-oriented simulation tasks. Chapter 3 summarizes how deformation and force can be computed discretely on a tetrahedral mesh, and how an implicit integrator can be structured around this discretization. Finally, chapter 4 presents the state of the art in model reduction techniques for real-time FEM solid simulation and discusses which techniques are suitable for which applications. Topics discussed in this chapter include linear modal analysis, modal warping, subspace simulation, and domain decomposition.
