DEVELOPMENT OF BRICK AND MORTAR MATERIAL 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 beenperformed using homogenized material properties; however, heterogeneousmaterial properties for brick and mortar for a constitutive model built intohydrocodes have been unavailable. The Holmquist-Johnson-Cook (HJC)constitutive model for concrete captures pressure and strain-rate dependentstrength behavior and void crushing damage behavior of porous materialsreasonably well, is readily available in many hydrocodes, and is commonlyused to simulate high-velocity penetration of concrete. This paper describesthe development of the brick and mortar material parameters for the HJCmaterial model-including exploration of the materials’ strength, damage,and pressure behavior-from available static and dynamic test data, and thepaper provides the HJC model material parameters for brick and mortar.The paper also presents sample numerical simulations, using the materialparameters developed, and compares the resulting material behavior tomechanical test data.