Applicability of Stress-Strain Laws to Dynamic Problems.
Final rept. 21 Jan 66-15 Jun 70,
WASHINGTON UNIV SEATTLE DEPT OF AERONAUTICS AND ASTRONAUTICS
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An important problem in the dynamic response of solids is the establishment of the range and general applicability of proposed theories. An investigation of this problem can best be carried out with the introduction of a set of experiments that differ from those used to develop the theories originally. The experiments used in this study applied an exploding wire system as the loading mechanism to produce plane strain cylindrical stress wave propagation. The loading rates exceeded the classical bar experiments by approximately an order of magnitude, but were in themselves approximately an order of magnitude lower than the light gas gun experiments. To solve the appropriate initial value problem associated with the exploding wire loading, the method of characteristics was employed. Carrying out the analysis with different forms of possible stress-strain laws, it is possible to compare the results with the experimentally observed values. Author