Download or read book Microcrack Damage Model for Brittle Rock written by Sandia national laboratories and published by . This book was released on 1983 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Combined Finite Discrete Element Method written by Antonio A. Munjiza and published by John Wiley & Sons. This book was released on 2004-04-21 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: The combined finite discrete element method is a relatively new computational tool aimed at problems involving static and / or dynamic behaviour of systems involving a large number of solid deformable bodies. Such problems include fragmentation using explosives (e.g rock blasting), impacts, demolition (collapsing buildings), blast loads, digging and loading processes, and powder technology. The combined finite-discrete element method - a natural extension of both discrete and finite element methods - allows researchers to model problems involving the deformability of either one solid body, a large number of bodies, or a solid body which fragments (e.g. in rock blasting applications a more or less intact rock mass is transformed into a pile of solid rock fragments of different sizes, which interact with each other). The topic is gaining in importance, and is at the forefront of some of the current efforts in computational modeling of the failure of solids. * Accompanying source codes plus input and output files available on the Internet * Important applications such as mining engineering, rock blasting and petroleum engineering * Includes practical examples of applications areas Essential reading for postgraduates, researchers and software engineers working in mechanical engineering.
Download or read book Brittle Failure of Rock Materials written by G.E. Andreev and published by CRC Press. This book was released on 1995-01-01 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text comprises different basic aspects of brittle failure for rocks. It considers classical and contemporary models, as well as failure patterns under different loading schemes.
Download or read book Stability of Structures written by Z. P. Ba?ant and published by World Scientific. This book was released on 2010 with total page 1039 pages. Available in PDF, EPUB and Kindle. Book excerpt: A crucial element of structural and continuum mechanics, stability theory has limitless applications in civil, mechanical, aerospace, naval and nuclear engineering. This text of unparalleled scope presents a comprehensive exposition of the principles and applications of stability analysis. It has been proven as a text for introductory courses and various advanced courses for graduate students. It is also prized as an exhaustive reference for engineers and researchers. The authors' focus on understanding of the basic principles rather than excessive detailed solutions, and their treatment of each subject proceed from simple examples to general concepts and rigorous formulations. All the results are derived using as simple mathematics as possible. Numerous examples are given and 700 exercise problems help in attaining a firm grasp of this central aspect of solid mechanics. The book is an unabridged republication of the 1991 edition by Oxford University Press and the 2003 edition by Dover, updated with 18 pages of end notes.
Download or read book Micromechanics and Inhomogeneity written by G.J. Weng and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 647 pages. Available in PDF, EPUB and Kindle. Book excerpt: Toshio Mura has written extensively on micromechanics over the years, and in part due to his writings and many others in the field, micromechanics has gradually emerged as a recognized discipline in the study of mechanics of materials. The idea is to bring both the mechanics and physics on the micro scopic level to the macroscopic scale, so that the deformation and fracture processes of materials can be better understood. While much apparently remains to be done, this approach has already shed new light on certain selected topics and has proved to be fruitful. It is indeed a happy occasion to celebrate both Toshio's upcoming 65th birthday and the emergence of this young science at the same time. The volume contains thirty-seven original articles on the related topics of micromechanics and inhomogeneity; it is presented to Toshio by his friends, colleagues, and admirers as a wish for his good health and continuing pro ductivity. The contributors belong to both the applied mechanics and the materials communities, all with a common belief that micromechanics is an indispensable area of research. It is hoped that this somewhat balanced structure will make the volume more useful to a wider range of readers, and that in the meantime it will still reflect more or less the spectrum of Toshio's lifelong works. As Editors we have at the outset set the highest possible standards for the book, with a keen anticipation that the volume will be widely circulated for many years to come.
Download or read book Mechanism of Brittle Fracture of Rock written by Z. T. Bieniawski and published by . This book was released on 1967 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Micromechanical Damage Theories for Brittle Solids with Interacting Microcracks written by and published by . This book was released on 1993 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two-dimensional and three-dimensional statistical micromechanical damage models with randomly located interacting microcracks are presented to investigate the overall nonlinear mechanical responses of microcrack-weakened brittle solids. The macroscopic stress-strain relations of elastic solids with interacting micro-cracks are micromechanically derived by taking the ensemble average over all possible realizations. Several different approximate analytical solutions of a two-crack interaction model are introduced to account for micro- crack interaction among many randomly oriented and distributed microcracks. The overall elastic damage compliances of microcrack-weakened brittle solids are also derived by further taking the volume average of the ensemble-averaged stress-strain relations over the entire material mesostructural domain. Some special examples are investigated by using the proposed framework. At variance with existing phenomenological damage models, the proposed framework does not employ any fitted 'material parameters'. 'Cleavage 1' microcrack growth and 'evolutionary damage models' within the proposed context are also presented. Micromechanical damage mechanics, Brittle solids, Interact microcracks, Evolutionary damage models, Constitutive modelling.
Download or read book Elementary engineering fracture mechanics written by D. Broek and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: When asked to start teaching a course on engineering fracture mechanics, I realized that a concise textbook, giving a general oversight of the field, did not exist. The explanation is undoubtedly that the subject is still in a stage of early development, and that the methodologies have still a very limited applicability. It is not possible to give rules for general application of fracture mechanics concepts. Yet our comprehension of cracking and fracture beha viour of materials and structures is steadily increasing. Further developments may be expected in the not too distant future, enabling useful prediction of fracture safety and fracture characteristics on the basis of advanced fracture mechanics procedures. The user of such advanced procedures m\lst have a general understanding of the elementary concepts, which are provided by this volume. Emphasis was placed on the practical application of fracture mechanics, but it was aimed to treat the subject in a way that may interest both metallurgists and engineers. For the latter, some general knowledge of fracture mechanisms and fracture criteria is indispensable for an apprecia tion of the limita tions of fracture mechanics. Therefore a general discussion is provided on fracture mechanisms, fracture criteria, and other metal lurgical aspects, without going into much detail. Numerous references are provided to enable a more detailed study of these subjects which are still in a stage of speculative treatment.
Download or read book Rock Failure Mechanisms written by Chun'An Tang and published by CRC Press. This book was released on 2010-08-06 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: When dealing with rock in civil engineering, mining engineering and other engineering, the process by which the rock fails under load should be understood, so that safe structures can be built on and in the rock. However, there are many ways for loading rock and rock can have a variety of idiosyncracies. This reference book provides engineers and researchers with the essential knowledge for a clear understanding of the process of rock failure under different conditions. It contains an introductory chapter explaining the role of rock failure in engineering projects plus a summary of the theories governing rock failure and an explanation of the computer simulation method. It subsquently deals in detail with explaining, simulating and illustrating rock failure in laboratory and field. The concluding chapter discusses coupled modelling and the anticipated future directions for this type of computer simulation. An appendix describing the RFPA numerical model (Rock Failure Process Analysis program) is also included. About the Authors Chun'an Tang has a PhD in Mining Engineering and is a Professor at the School of Civil & Hydraulic Engineering at Dalian University of Technology in China. He is an advisor for design and stablity problem modelling in mining and civil rock engineeringand and Chairman of the China National Group of the International Society for Rock Mechanics. John Hudson is emeritus professor at Imperial College, London and is active as an independant consultant for Rock Engineering Consultants. He has a PhD in Rock Mechanics and completed over a 130 rock engineering consulting assignments in mining and civil engineering. He is a fellow at the Royal Academy of Engineering in the UK and President of the International Society for Rock Mechanics.
Download or read book The Damage Mechanics of Brittle Solids in Compression written by C. G. Sammis and published by . This book was released on 1988 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of microcrack damage in brittle in solids in compression is analyzed, using a simple model. The model is developed from recent detailed analysis of the initiation, propagation and linkage of microfractures from pre-existing cracks, voids, or other in-homogeneities. It describes the evolution of damage with strain and from it the stress-strain response, and criteria for failure, can be established. The results are used to construct failure surfaces in stress space which combine information about brittle failure with data describing the onset of plastic yielding. Such failure surfaces are constructed for a number of rocks and are compared with previously published experimental data. Brittle failure, Damage mechanics, Microfractures, Compressive failure. (JES).
Download or read book Fracture of Brittle Disordered Materials Concrete Rock and Ceramics written by G. Baker and published by CRC Press. This book was released on 2004-01-14 with total page 593 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book derives from the invited IUTAM Symposium in September 1993. The contributions discuss recent advances in fracture mechanics studies of concrete, rock, ceramics and other brittle disordered materials at micro and structural levels. It draws together research and new applications in continuum, damage and fracture mechanics approaches.
Download or read book Physical and Mechanical Properties of Rocks written by Institut geologii rudnykh mestorozhdeniĭ, petrografii, mineralogii i geokhimii (Akademii︠a︡ nauk SSSR) and published by . This book was released on 1967 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rock Dynamics and Applications 3 written by Charlie C. Li and published by CRC Press. This book was released on 2018-06-18 with total page 1146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rock Dynamics – Experiments, Theories and Applications is a collection of scientific and technical papers presented at the Third International Conference on Rock Dynamics and Applications (RocDyn-3, Trondheim, Norway, 26-27 June 2018). The papers in the book reflect the recent developments in experiment and theory as well as engineering applications of rock dynamics. Rock dynamics studies the response of rock and rock masses under dynamic loading and during the state transition from static loading to kinetic movement. It also includes the study of engineering countermeasures to dynamic instability of rock and rock masses. The topics in the book include: - Dynamic theories - Numerical simulation - Propagation of stress waves - Dynamic tests of rock - Stability of underground openings under dynamic loading - Rockburst - Seismic monitoring - Dynamic rock support - Blasting - Earthquake-related rock structure damage, etc. Applications, such as rockburst, dynamic rock support, seismic monitoring, blasting and earthquake-related rock structure damage, are paid special attention in Rock Dynamics – Experiments, Theories and Applications. The papers, from specialists both from mining and tunnelling branches, discuss commonly interested dynamic issues. Their experience and knowledge in the application of rock dynamics are extremely valuable for all academics, engineers and professionals who work with rock dynamics.
Download or read book Quasibrittle Fracture Mechanics and Size Effect written by Jia-Liang Le and published by Oxford University Press. This book was released on 2021-11-19 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many modern engineering structures are composed of brittle heterogenous, or quasibrittle, materials. These include concrete, composites, tough ceramics, rocks, cold asphalt mixtures, and many brittle materials at the microscale. Understanding the failure behavior of these materials is of paramount importance for improving the resilience and sustainability of various engineering structures including civil infrastructure, aircraft, ships, military armors, and microelectronic devices. Designed for graduate and upper-level undergraduate university courses, this textbook provides a comprehensive treatment of quasibrittle fracture mechanics. It includes a concise but rigorous examination of linear elastic fracture mechanics, which is the foundation of all fracture mechanics. It also covers the fundamental concepts of nonlinear fracture mechanics, and introduces more advanced concepts such as triaxial stress state in the fracture process zone, nonlocal continuum models, and discrete computational models. Finally, the book features extensive discussion of the various practical applications of quasibrittle fracture mechanics across different structures and engineering disciplines, and throughout includes exercises and problems for students to test their understanding.
Download or read book Characterization of Brittle Damage in Rock from the Micro to Macro Scale written by Pooya Hamdi and published by . This book was released on 2015 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: An Increasing need for mining and constructing underground facilities at a greater depth and under high in-situ stresses have introduced new challenges in the form of brittle rock fracture. Brittle fracture is a complex mechanism comprising different stages of failure including initiation, propagation and coalescence. Brittle fracture studies in rock can be undertaken at a wide range of scales from the micro scale i.e. microcrack/grain scale in laboratory samples through the meso scale (underground excavations) to the macro scale such as in-situ engineered/natural rock slopes or block cave mines. At all these scales the rock/rock mass is subjected to "damage" which influences the engineering performance. Improved understanding of brittle damage at various scales requires development of damage intensity measures to quantify brittle fracture for both pre-existing and stress-induced fractures and the use of advanced numerical modelling approach. In this study, a state-of-the-art numerical modelling approach based on the combined finite/discrete element method (FDEM) is integrated with discrete fracture network engineering, DFNE, in order to evaluate brittle damage at varied scales. The influence of micro-heterogeneity is studied at the laboratory scale by incorporating a micro discrete fracture network (μDFN). A wide range of laboratory testing including Brazilian, uniaxial, biaxial and triaxial compression tests are modeled to investigated the complete 3D fracture process. At the meso scale, mechanisms leading to strain bursting and spalling damage around underground openings are studied focusing on the influence of pre-existing cracks in a massive rock mass. Finally at the macro scale, a finite/discrete element modelling approach coupled with a discrete fracture network (FDEM-DFN) is utilized to analyze the hanging wall surface subsidence associated with sub-level caving. A suite of model data interpretation methods including time-displacement hanging wall deformation characterization, numerical inverse velocity analysis and virtual hanging wall inclinometers is adopted to improve our understanding of the extent and mechanism of hanging wall failure with mine advance.
Download or read book Geologic Fracture Mechanics written by Richard A. Schultz and published by Cambridge University Press. This book was released on 2019-08-08 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to geologic fracture mechanics covering geologic structural discontinuities from theoretical and field-based perspectives.
Download or read book Microcrack Characterization and the Fracture Mechanism of Damaged Rock written by Chee-Nan Chen and published by . This book was released on 1992 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
