Continuum Fracture and Fragmentation of Rock
Author: Frank M. Bacon
Publisher:
Published: 1978
Total Pages: 48
ISBN-13:
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Author: Frank M. Bacon
Publisher:
Published: 1978
Total Pages: 48
ISBN-13:
DOWNLOAD EBOOKAuthor: Barry Kean Atkinson
Publisher: Elsevier
Published: 2015-05-11
Total Pages: 547
ISBN-13: 1483292746
DOWNLOAD EBOOKThe 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.
Author: J. C. S. Long
Publisher:
Published: 1985
Total Pages: 260
ISBN-13:
DOWNLOAD EBOOKAuthor: Lee Davison
Publisher: Springer Science & Business Media
Published: 2012-12-06
Total Pages: 496
ISBN-13: 1461223202
DOWNLOAD EBOOKThis volume concerns the fracture and fragmentation of solid materials that occurs when they are subjected to extremes of stress applied at the highest possible rates. The plan for the volume is to address experimental, theoretical, and com putational aspects of high-rate dynamic fracture and fragmentation, with emphasis on recent work. We begin with several chapters in which the emphasis falls on experimental methods and observations. These chapters address both macroscopic responses and the microscopic cause of these re sponses. This is followed by several chapters emphasizing modeling-the physical explanation and mathematical representation of the observations. Some of the models are deterministic, while others focus on the stochastic aspects of the observations. Often, the ov\!rall objective of investigation of dynamic fracture and fragmentation phenomena is provision of a means for predicting the entire course of an event that begins with a stimulus such as an impact and proceeds through a complicated deformation and fracture pro cess that results in disintegration of the body and formation of a rapidly expanding cloud of debris fragments. Analysis of this event usually involves development of a continuum theory and computer code that captures the experimental observations by incorporating models of the important pheno mena into a comprehensive description of the deformation and fracture pro cess. It is to this task that the work of the last few chapters is devoted.
Author:
Publisher:
Published: 1987
Total Pages: 644
ISBN-13:
DOWNLOAD EBOOKAuthor: M. B. Rubin
Publisher:
Published: 2005
Total Pages: 22
ISBN-13:
DOWNLOAD EBOOKResults are presented from a study investigating the effect of explosive and impact loading on geological media using the Livermore Distinct Element Code (LDEC). LDEC was initially developed to simulate tunnels and other structures in jointed rock masses with large numbers of intact polyhedral blocks. However, underground structures in jointed rock subjected to explosive loading can fail due to both rock motion along preexisting interfaces and fracture of the intact rock mass itself. Many geophysical applications, such as projectile penetration into rock, concrete targets, and boulder fields, require a combination of continuum and discrete methods in order to predict the formation and interaction of the fragments produced. In an effort to model these types of problems, we have implemented Cosserat point theory and cohesive element formulations into the current version of LDEC, thereby allowing for dynamic fracture and combined finite element/discrete element simulations. Results of a large-scale LLNL simulation of an explosive shock wave impacting an elaborate underground facility are also discussed. It is confirmed that persistent joints lead to an underestimation of the impact energy needed to fill the tunnel systems with rubble. Non-persistent joint patterns, which are typical of real geologies, inhibit shear within the surrounding rock mass and significantly increase the load required to collapse a tunnel.
Author: Finn Ouchterlony
Publisher:
Published: 1978
Total Pages: 52
ISBN-13:
DOWNLOAD EBOOKAuthor: Yingxin Zhou
Publisher: CRC Press
Published: 2011-05-25
Total Pages: 524
ISBN-13: 0203093208
DOWNLOAD EBOOKThe study of rock dynamics is important because many rock mechanics and rock engineering problems involve dynamic loading ranging from earthquakes to vibrations and explosions. The subject deals with the distribution and propagation of loads, dynamic responses, and processes of rocks and rate-dependent properties, coupled with the physical environm
Author: Jianchun Li
Publisher: CRC Press
Published: 2023-05-28
Total Pages: 784
ISBN-13: 1000883248
DOWNLOAD EBOOKRock Dynamics: Progress and Prospect contains 153 scientific and technical papers presented at the Fourth International Conference on Rock Dynamics and Applications (RocDyn-4, Xuzhou, China, 17-19 August 2022). The two-volume set has 7 sections. Volume 1 includes the first four sections with 6 keynotes and 5 young scholar plenary session papers, and contributions on analysis and theoretical development, and experimental testing and techniques. Volume 2 contains the remaining three sections with 74 papers on numerical modelling and methods, seismic and earthquake engineering, and rock excavation and engineering. Rock Dynamics: Progress and Prospect will serve as a reference on developments in rock dynamics scientific research and on rock dynamics engineering applications. The previous volumes in this series (RocDyn-1, RocDyn-2, and RocDyn-3) are also available via CRC Press.
Author: M. H. Aliabadi
Publisher: Computational Mechanics
Published: 1999
Total Pages: 450
ISBN-13:
DOWNLOAD EBOOKThere has been a significant increase in research activity in the area of crack growth in rocks. This book contains papers which represent recent theoretical, computational and experimental research in the field.