Download or read book Stress History Dependent Localization and Failure Using Continuum Damage Mechanics Concepts written by MF. Horstemeyer and published by . This book was released on 1997 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the notion of damage was introduced by Kachanov and Rabatnov in the late 1950s and early 1960s, the paradigm to better capture the physics of the internal state of a material has been realized in developing macroscale constitutive relationships for monolithic and composite materials. For ductile metals, damage occurs mainly in the form of void nucleation, growth, and coalescence. Localization and failure occur at two different stages in the deformation history and are very much functions of the void (porosity) evolution, which can be interpreted as the damage evolution, and the stress state history. The damage evolution of a polycrystalline metal is fully coupled to the stress history. In this study, different initial material properties are varied in four different boundary value problems to reflect the stress state and deformation history effects. Special attention is paid to three internal state variable evolution equations; one represents scalar damage, and the other two represent isotropic (scalar) hardening and kinematic (tensorial) hardening. Internal state evolution equations that capture history effects are necessary when trying to solve complex boundary value problems. This constitutive framework is embedded into a finite element formulation to solve such boundary value problems. Mesoscale analyses of A356- T6 aluminum under different stress states and initial material states are used to give insight into the void nucleation, growth, and coalescence issues that arise when formulating an internal state porosity evolution rule within a macroscale framework. This work was based on previous studiesrelated to the four boundary value problems. Numerical calculations were performed to compare to 6061-T6 aluminum notch tension tests with different notched radii. The various notch radii induce different levels of stress triaxiality and allow for correlation of different void growth rules. Numerical calculations of forming limit diagrams for 6061-T6 aluminum compared favorably to experimental results. Finally, penetration analyses were performed with 6061-T6 aluminum disks as targets.

Download or read book Applications of Continuum Damage Mechanics to Fatigue and Fracture written by David L. McDowell and published by ASTM International. This book was released on 1997 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains papers from the May 1996 Symposium on Applications of Continuum Damage Mechanics (CDM) to Fatigue and Fracture. Papers in Section I deal with various aspects of modeling damage in composite materials, such as high temperature environmental degradation, fatigue, and viscous damage in metal a

Download or read book Continuum Damage Mechanics and Numerical Applications written by Wohua Zhang and published by Springer Science & Business Media. This book was released on 2010-11-19 with total page 937 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Continuum Damage Mechanics and Numerical Applications" presents a systematic development of the theory of Continuum Damage Mechanics and its numerical engineering applications using a unified form of the mathematical formulations in anisotropic and isotropic damage models. The theoretical framework is based on the thermodynamic theory of energy and material dissipation and is described by a set of fundamental formulations of constitutive equations of damaged materials, development equations of the damaged state, and evolution equations of micro-structures. According to concepts of damage-dissipation of the material state and effective evolution of material properties, all these advanced equations, which take nonsymmetrized effects of damage aspects into account, are developed and modified from the traditional general failure models so they are more easily applied and verified in a wide range of engineering practices by experimental testing. Dr. Wohua Zhang is a Professor at Engineering Mechanics Research Center in Zhejiang University of China. Dr. Yuanqiang Cai is a Professor at Department of Civil Engineering in Zhejiang University of China.

Download or read book Integrated Computational Materials Engineering ICME for Metals written by Mark F. Horstemeyer and published by John Wiley & Sons. This book was released on 2012-06-07 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: State-of-the-technology tools for designing, optimizing, and manufacturing new materials Integrated computational materials engineering (ICME) uses computational materials science tools within a holistic system in order to accelerate materials development, improve design optimization, and unify design and manufacturing. Increasingly, ICME is the preferred paradigm for design, development, and manufacturing of structural products. Written by one of the world's leading ICME experts, this text delivers a comprehensive, practical introduction to the field, guiding readers through multiscale materials processing modeling and simulation with easy-to-follow explanations and examples. Following an introductory chapter exploring the core concepts and the various disciplines that have contributed to the development of ICME, the text covers the following important topics with their associated length scale bridging methodologies: Macroscale continuum internal state variable plasticity and damage theory and multistage fatigue Mesoscale analysis: continuum theory methods with discrete features and methods Discrete dislocation dynamics simulations Atomistic modeling methods Electronics structures calculations Next, the author provides three chapters dedicated to detailed case studies, including "From Atoms to Autos: A Redesign of a Cadillac Control Arm," that show how the principles and methods of ICME work in practice. The final chapter examines the future of ICME, forecasting the development of new materials and engineering structures with the help of a cyberinfrastructure that has been recently established. Integrated Computational Materials Engineering (ICME) for Metals is recommended for both students and professionals in engineering and materials science, providing them with new state-of-the-technology tools for selecting, designing, optimizing, and manufacturing new materials. Instructors who adopt this text for coursework can take advantage of PowerPoint lecture notes, a questions and solutions manual, and tutorials to guide students through the models and codes discussed in the text.

Download or read book Continuum Damage Mechanics of Materials and Structures written by O. Allix and published by Elsevier. This book was released on 2002-08-13 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: Created in 1975, LMT-Cachan is a joint laboratory École Normale Superieure de Cachan, Pierre & Marie Curie (Paris 6) University and the French Research Council CNRS (Department of Engineering Sciences). The Year 2000 marked the 25th anniversary of LMT. On this occasion, a series of lectures was organized in Cachan in September-October, 2000. This publication contains peer-reviewed proceedings of these lectures and is aimed to present engineers and scientists with an overview of the latest developments in the field of damage mechanics. The formulation of damage models and their identification procedures were discussed for a variety of materials.

Download or read book 6th International Conference on Mechanical and Physical Behaviour of Materials Under Dynamic Loading written by and published by . This book was released on 2000 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book DYMAT 2000 Krak w written by and published by . This book was released on 2000 with total page 1102 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Introduction to continuum damage mechanics written by and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fracture Mechanics of Rock written by Barry Kean Atkinson and published by Elsevier. This book was released on 2015-05-11 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: The analysis of crack problems through fracture mechanics has been applied to the study of materials such as glass, metals and ceramics because relatively simple fracture criteria describe the failure of these materials. The increased attention paid to experimental rock fracture mechanics has led to major contributions to the solving of geophysical problems. The text presents a concise treatment of the physics and mathematics of a representative selection of problems from areas such as earthquake mechanics and prediction, hydraulic fracturing, hot dry rock geothermal energy, fault mechanics, and dynamic fragmentation.

Download or read book 6e Congr s International Sur Le Comportement M canique Et Physique Des Mat iaux Sous Sollicitations Dynamiques written by and published by . This book was released on 2000 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Introduction to continuum damage mechanics written by L. Kachanov and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern engineering materials subjected to unfavorable mechanical and environmental conditions decrease in strength due to the accumulation of microstructural changes. For example, considering damage in metals we can mention creep damage, ductile plastic damage, embrittlement of steels and fatigue damage. To properly estimate the value of damage when designing reliable structures it is necessary to formulate the damage phenomenon in terms of mechanics. Then it is possible to analyse various engineering problems using analytical and computational techniques. During the last two decades the basic principles of continuum damage mechanics were formulated and some special problems were solved. Many scientific papers were published and several conferences on damage mechanics took place. Now continuum damage mechanics is rapidly developing branch of fracture mechanics. This book is probably the first one on the subject; it contains a sys tematic description of the basic aspects of damage mechanics and some of its applications. In general, a theoretical description of damage can be rather compli cated. The experiments in this field are difficult (especially under multiax ial stress and non-proportional loading). Therefore, experimental data, as a rule, are scarce. Determination of functions and constants, which play a role in the complex variants of the theory, from available experimental data is often practically impossible. ix L.M. Kachanov The problems of damage mechanics are mainly engineering ones. Therefore, the author tries to avoid superfluous mathematical formalism. Some more details of the book's subject can be found in the list of con tents.

Download or read book Journal de physique written by and published by . This book was released on 2000 with total page 874 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fracture Mechanics of Ceramics written by R.C. Bradt and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 591 pages. Available in PDF, EPUB and Kindle. Book excerpt: Second part of the proceedings of the Sixth International Symposium held in Karlsruhe, Germany, July 18-20, 1995.

Download or read book Metals Abstracts written by and published by . This book was released on 1998 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Deformation and Progressive Failure in Geomechanics written by A. Asaoka and published by Elsevier. This book was released on 1997-10-23 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progressive failure has been a classical problem in the field of geotechnical engineering and has attracted considerable attention in connection with slope stability and foundation problems. It is associated with strain localization or shear banding and is also related to damage in material structures. As knowledge of the progressive failure mechanism increases, it is now necessary to establish effective communications between researchers and engineers. The International Symposium on Deformation and Progressive Failure in Geomechanics provided an opportunity for discussing recent advances in this area. A total of 136 papers were contributed from 22 countries. As well as these, the symposium proceedings also contain 8 interim technical reports on the subject by the members of the Asian Technical Committee of the International Society for Soil Mechanics and Foundation Engineering and the Japanese Geotechnical Society National Committee on Progressive Failure in Geo-structures.

Download or read book Damage Mechanics written by D. Krajcinovic and published by Elsevier. This book was released on 1996-04-22 with total page 773 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the first truly comprehensive study of damage mechanics. All concepts are carefully identified and defined in micro- and macroscopic scales. In terms of the methods and observation scales, the main part of the book is divided into three chapters. These chapters consider the stochastic models applied to atomistic scale, micromechanical models (for arbitary concentrations of defects) on microscopic scale and continuum models on the macroscopic scale. It is intended for people who are doing or planning to do research in the mechanics and material science aspects of brittle deformation of solids with heterogeneous microstructure.