Development of Geomaterial Parameters for Numerical Simulations Using the Holmquist-Johnson-Cook Constitutive Model for Concrete

摘要

Numerical simulation of brick and mortar masonry in the literature has been performed using homogenized material properties; however, heterogeneous material properties for brick and mortar for a constitutive model built into hydrocodes have been unavailable. The Holmquist-Johnson-Cook (HJC) constitutive model for concrete captures pressure and strain-rate-dependent strength behavior and void crushing damage behavior of porous materials reasonably well, is readily available in many hydrocodes, and is commonly used to simulate high-velocity penetration of concrete. This report describes the development of the brick and mortar material parameters for the HJC material model-including exploration of the materials, strength, damage, and pressure behavior-from available static and dynamic test data for brick, two types of mortar, and adobe. The report also presents sample numerical simulations, using the material parameters developed, and compares the resulting material behavior to mechanical test data.