Development of brick and mortar material parameters for numerical simulations

Abstract

Numerical simulation of brick and mortar masonry in the literature has been performed using homogenized material properties; however, discrete 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 brittle solids reasonably well, is readily available in many hydrocodes, and is commonly used to simulate high-velocity penetration of concrete. Due to these considerations and the similarity of concrete to brick and mortar materials, the HJC constitutive model was selected for material parameterization of brick and mortar characterization data. This paper will describe the development of the brick and mortar material parameters - including exploration of the materials' strength, damage, and pressure behavior - from available static and dynamic test data, and the paper will provide the HJC constitutive model material parameters for brick and mortar. The paper will also present sample numerical simulations, using the material parameters developed, and comparing the resulting material behavior with mechanical test data.