Chapter 2 Failure mechanics

Publisher Summary This chapter discusses failure mechanics. This chapter discusses the most elementary and well known models for rock failure. It is important to note, that these are only simplified descriptions of real rock behavior. This chapter illustrates that rock failure is a complex process, which is still not fully understood. Moreover, much of the framework used to handle rock failure is therefore based on convenient mathematical descriptions of observed behavior, rather than derivations from basic laws of physics. The chapter assumes that rocks are homogeneous and isotropic. This chapter discusses anisotropy, while some consequences of inhomogeneities are briefly addresses in the chapter. It also takes a look at a couple of the most important tests used to measure rock strength, the uniaxial and triaxial tests, in order to illustrate the complexity of rock failure, and to introduce some basic concepts.

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