Constitutive Modeling of Air and Water Saturated Sand for Shock PropagationModeling. Workshop Summary and Recommendations

摘要

The mine countermeasure research program is an Office of Naval Research programthat addresses the physical characterization and modeling of the surf zone environment, explosive shock propagation and mitigation in this environment, and the means to improve the performance prediction of mine countermeasure efforts in the surf zone. This report summarizes the results of the Workshop on Constitutive Modeling of Air and Water Saturated Sand for Shock Propagation Modeling sponsored by the Naval Research Laboratory. The objectives of this workshop were to appraise the present state of knowledge with respect to the characterization of the air and water saturated sandy medium, the experimental evidence for shock mitigation and propagation in this medium, the present constitutive modeling capabilities, and to develop a focused research effort to address the complex physics issues related to this task. Participants discussed issues associated with mine countermeasure systems including shock wave propagation in sandy sediments with water and free-air pore fluid, measurement of the mechanical properties of both dry and partially saturated sand, hydrodynamic modeling of this environment, and continuum and micromechanical aspects of constitutive models. (MM).