Effect of Spall on the Characteristics of Explosive Ground Motion.
Final rept. 1 May 81-30 Apr 82,
APPLIED RESEARCH ASSOCIATES INC ALBUQUERQUE NM
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An empirical technique is developed for predicting the vertical and horizontal extent of spall in soil or rock due to near-surface chemical or nuclear explosions. One-dimensional numerical analyses are presented describing multiple spalls in a tensilely weak, hysteretic material with a free surface. Theoretical analyses of the pore air effect are presented. They show that a fundamental understanding of soil spall requires an effective stress approach. Author