In Chapter 7 we took it on faith that the stress vectors at a point in two dimensions define an ellipse. In this chapter we calculate the stress vector on a plane from given boundary stresses on a block of rock. We do this first for a specific numerical example, and second for a more general case that demonstrates the reality of the stress ellipse.
KeywordsPrincipal Stress Force Vector Triaxial Stress Direction Cosine Stress Vector
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