Strain Gradient Plasticity Based Modeling Of Damage And Fracture PDF Download
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| Author | : Emilio Martínez Pañeda |
| Publisher | : Springer |
| Total Pages | : 166 |
| Release | : 2017-08-23 |
| Genre | : Science |
| ISBN | : 3319633848 |
Download Strain Gradient Plasticity-Based Modeling of Damage and Fracture Book in PDF, ePub and Kindle
This book provides a comprehensive introduction to numerical modeling of size effects in metal plasticity. The main classes of strain gradient plasticity formulations are described and efficiently implemented in the context of the finite element method. A robust numerical framework is presented and employed to investigate the role of strain gradients on structural integrity assessment. The results obtained reveal the need of incorporating the influence on geometrically necessary dislocations in the modeling of various damage mechanisms. Large gradients of plastic strain increase dislocation density, promoting strain hardening and elevating crack tip stresses. This stress elevation is quantified under both infinitesimal and finite deformation theories, rationalizing the experimental observation of cleavage fracture in the presence of significant plastic flow. Gradient-enhanced modeling of crack growth resistance, hydrogen diffusion and environmentally assisted cracking highlighted the relevance of an appropriate characterization of the mechanical response at the small scales involved in crack tip deformation. Particularly promising predictions are attained in the field of hydrogen embrittlement. The research has been conducted at the Universities of Cambridge, Oviedo, Luxembourg, and the Technical University of Denmark, in a collaborative effort to understand, model and optimize the mechanical response of engineering materials.
| Author | : Blaise Bourdin |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 173 |
| Release | : 2008-04-19 |
| Genre | : Technology & Engineering |
| ISBN | : 1402063954 |
Download The Variational Approach to Fracture Book in PDF, ePub and Kindle
Presenting original results from both theoretical and numerical viewpoints, this text offers a detailed discussion of the variational approach to brittle fracture. This approach views crack growth as the result of a competition between bulk and surface energy, treating crack evolution from its initiation all the way to the failure of a sample. The authors model crack initiation, crack path, and crack extension for arbitrary geometries and loads.
| Author | : George Z. Voyiadjis |
| Publisher | : Elsevier |
| Total Pages | : 405 |
| Release | : 2020-03-27 |
| Genre | : Technology & Engineering |
| ISBN | : 0128177675 |
Download Gradient-Enhanced Continuum Plasticity Book in PDF, ePub and Kindle
Gradient-Enhanced Continuum Plasticity provides an expansive review of gradient-enhanced continuum plasticity from the initial stage to current research trends in experimental, theoretical, computational and numerical investigations. Starting with an overview of continuum mechanics and classical plasticity, the book then delves into concise lessons covering basic principles and applications, such as outlining the use of the finite element method to solve problems with size effects, mesh sensitivity and high velocity impact loading. All major theories are explored, providing readers with a guide to understanding the various concepts of and differences between an array of gradient-enhanced continuum plasticity models. Outlines the concepts of, and differences between, various gradient-enhanced continuum plasticity models Provides guidance on problem-solving for size effects, mesh-sensitivity tests and thermo-mechanical coupling Reviews experimental, numerical and theoretical issues in gradient-enhanced continuum plasticity Describes micromechanical aspects from experimental observations
| Author | : Albrecht Bertram |
| Publisher | : Springer Nature |
| Total Pages | : 177 |
| Release | : 2020-06-30 |
| Genre | : Science |
| ISBN | : 3030438309 |
Download Mechanics of Strain Gradient Materials Book in PDF, ePub and Kindle
Over the past 50 years, strain gradient material theories have been developed for the continuum modeling of size effects in materials and structures in terms of their elasticity, plasticity and fracturing. This book puts forward a unifying perspective to combine existing theories involving the higher order gradient of the strain tensor, or of plastic strain. It begins by reviewing experimental findings on the existence (or non-existence) of size effects on the mechanics of materials. In turn, the book devises first, second and higher order strain gradient theories from general principles, and presents constitutive frameworks that satisfy thermodynamic requirements. The special case of strain gradient plasticity is then developed and illustrated via computational analyses of size effects on the plasticity of metals at small scales. In closing, the book explains the origin of gradient effects in the case of lattice structures by drawing on homogenization theory.
| Author | : Franz Roters |
| Publisher | : John Wiley & Sons |
| Total Pages | : 188 |
| Release | : 2011-08-04 |
| Genre | : Technology & Engineering |
| ISBN | : 3527642099 |
Download Crystal Plasticity Finite Element Methods Book in PDF, ePub and Kindle
Written by the leading experts in computational materials science, this handy reference concisely reviews the most important aspects of plasticity modeling: constitutive laws, phase transformations, texture methods, continuum approaches and damage mechanisms. As a result, it provides the knowledge needed to avoid failures in critical systems udner mechanical load. With its various application examples to micro- and macrostructure mechanics, this is an invaluable resource for mechanical engineers as well as for researchers wanting to improve on this method and extend its outreach.
| Author | : George Z. Voyiadjis |
| Publisher | : Elsevier |
| Total Pages | : 566 |
| Release | : 1999-11-09 |
| Genre | : Science |
| ISBN | : 9780080436012 |
Download Advances in Damage Mechanics Book in PDF, ePub and Kindle
This text presents advances in continuum damage mechanics for metals and metal matrix composites. Emphasis is placed on the theoretical formulation of the different constitutive models in this area, but sections are added to demonstrate the applications of the theory.
| Author | : Viktor Mechtcherine |
| Publisher | : Springer |
| Total Pages | : 811 |
| Release | : 2017-09-04 |
| Genre | : Technology & Engineering |
| ISBN | : 9402411941 |
Download Strain-Hardening Cement-Based Composites Book in PDF, ePub and Kindle
This is the proceedings of the 4th International Conference on Strain-Hardening Cement-Based Composites (SHCC4), that was held at the Technische Universität Dresden, Germany from 18 to 20 September 2017. The conference focused on advanced fiber-reinforced concrete materials such as strain-hardening cement-based composites (SHCC), textile-reinforced concrete (TRC) and high-performance fiber-reinforced cement-based composites (HPFRCC). All these new materials exhibit pseudo-ductile behavior resulting from the formation of multiple, fine cracks when subject to tensile loading. The use of such types of fiber-reinforced concrete could revolutionize the planning, development, dimensioning, structural and architectural design, construction of new and strengthening and repair of existing buildings and structures in many areas of application. The SHCC4 Conference was the follow-up of three previous successful international events in Stellenbosch, South Africa in 2009, Rio de Janeiro, Brazil in 2011, and Dordrecht, The Netherlands in 2014.
| Author | : Stéphane P. A. Bordas |
| Publisher | : John Wiley & Sons |
| Total Pages | : 373 |
| Release | : 2023-10-19 |
| Genre | : Technology & Engineering |
| ISBN | : 111853588X |
Download Partition of Unity Methods Book in PDF, ePub and Kindle
PARTITION OF UNITY METHODS Master the latest tool in computational mechanics with this brand-new resource from distinguished leaders in the field While it is the number one tool for computer aided design and engineering, the finite element method (FEM) has difficulties with discontinuities, singularities, and moving boundaries. Partition of unity methods addresses these challenges and is now increasingly implemented in commercially available software. Partition of Unity Methods delivers a detailed overview of its fundamentals, in particular the extended finite element method for applications in solving moving boundary problems. The distinguished academics and authors introduce the XFEM as a natural extension of the traditional finite element method (FEM), through straightforward one-dimensional examples which form the basis for the subsequent introduction of higher dimensional problems. This book allows readers to fully understand and utilize XFEM just as it becomes ever more crucial to industry practice. Partition of Unity Methods explores all essential topics on this key new technology, including: Coverage of the difficulties faced by the finite element method and the impetus behind the development of XFEM The basics of the finite element method, with discussions of finite element formulation of linear elasticity and the calculation of the force vector An introduction to the fundamentals of enrichment A revisitation of the partition of unity enrichment A description of the geometry of enrichment features, with discussions of level sets for stationary interfaces Application of XFEM to bio-film, gradient theories, and three dimensional crack propagation Perfect for researchers and postdoctoral candidates working in the field of computational mechanics, Partition of Unity Methods also has a place in the libraries of senior undergraduate and graduate students working in the field. Finite element and CFD analysts and developers in private industry will also greatly benefit from this book.
| Author | : David Edward Lambert |
| Publisher | : John Wiley & Sons |
| Total Pages | : 439 |
| Release | : 2019-01-14 |
| Genre | : Technology & Engineering |
| ISBN | : 1119579341 |
Download Dynamic Damage and Fragmentation Book in PDF, ePub and Kindle
Engineering structures may be subjected to extreme high-rate loading conditions, like those associated with natural disasters (earthquakes, tsunamis, rock falls, etc.) or those of anthropic origin (impacts, fluid–structure interactions, shock wave transmissions, etc.). Characterization and modeling of the mechanical behavior of materials under these environments is important in predicting the response of structures and improving designs. This book gathers contributions by eminent researchers in academia and government research laboratories on the latest advances in the understanding of the dynamic process of damage, cracking and fragmentation. It allows the reader to develop an understanding of the key features of the dynamic mechanical behavior of brittle (e.g. granular and cementitious), heterogeneous (e.g. energetic) and ductile (e.g. metallic) materials.
| Author | : Q.S. Nguyen |
| Publisher | : Springer |
| Total Pages | : 296 |
| Release | : 2014-05-04 |
| Genre | : Science |
| ISBN | : 3709127122 |
Download Bifurcation and Stability of Dissipative Systems Book in PDF, ePub and Kindle
The first theme concerns the plastic buckling of structures in the spirit of Hill’s classical approach. Non-bifurcation and stability criteria are introduced and post-bifurcation analysis performed by asymptotic development method in relation with Hutchinson’s work. Some recent results on the generalized standard model are given and their connection to Hill’s general formulation is presented. Instability phenomena of inelastic flow processes such as strain localization and necking are discussed. The second theme concerns stability and bifurcation problems in internally damaged or cracked colids. In brittle fracture or brittle damage, the evolution law of crack lengths or damage parameters is time-independent like in plasticity and leads to a similar mathematical description of the quasi-static evolution. Stability and non-bifurcation criteria in the sense of Hill can be again obtained from the discussion of the rate response.
