Abstract
A hydrostatic stress modified maximum tensile strain theory of fracture previously shown to be in good agreement with results on tungsten carbide specimens loaded to fracture under a variety of complex states of stress is discussed. This theory is applied to tests on marble involving two states of complex stress. The results suggest that the size effect in brittle fracture is smaller than usually assumed. The theory explains the difference in maximum tensile stress at fracture for torsion and uniaxial tensile tests.
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