An Analytical and Numerical Investigation of Failure Waves
Final technical rept. 15 Jul 1996-30 Sep 99
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Based on the proposed plane, an analytical and numerical investigation has been performed on the failure wave phenomenon. It appears that progressive percolation of microfissures into the material bulk governs the failure wave mechanisms. A three-dimensional damage diffusion model has been developed based on the assumption of shear-induced dilatancy. Because of the termination of the Shock Physics Program, no consistent experimental data could be obtained from other researchers supported under this program to explore the failure waves in geologic materials. Hence, the shock experiments on glass specimens have been considered to verify the proposed modeling and simulation approaches. The constitutive model has been implemented into the computer programs by using both the finite element and material point methods. The numerical solutions obtained by different methods are consistent, and the comparisons with experimental data are reasonable.