ELASTIC-PLASTIC BOUNDARIES IN PLANE AND CYLINDRICAL WAVE PROPAGATION OF COMBINED STRESSES
Interim technical rept.
STANFORD UNIV CA DEPT OF APPLIED MECHANICS
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A general study is given of plane and cylindrical wave propagation of combined stresses in an elastic-plastic medium. The coefficients of the governing differential equations, when written in matrix notation, are symmetric matrices and can be divided into sub-matrices each of which has a special form. The relations between the stresses on both sides of an elastic-plastic boundary are derived. Also presented are the restrictions on the speed of an elastic- plastic boundary.