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  1. Jan 2017
    1. Anderson's theory of Faulting explains some of the faults found in nature but fails to find all types of fault and fault system.

      Parabolic failure envelope again as it gets into negative stresses.

      At high stresses( opposite of tensile stresses) plastic deformation occurs at high normal stress, shear stress would be independent here. if the differential stress is known you can start to form a composite failure envelope in which the 5 fault types occur at different differential stresses