Progressive Composite Damage Modeling in LS-DYNA Using MAT162: Part B—Model Validating Experiments

Abstract

Rate dependent progressive composite damage model MAT162 in LS-DYNA is the state-of-the-art in composite damage modeling in 3D. Two progressive damage modules for Uni-directional (UD) and woven fabric composites (FABRIC) are available in MAT162. These two damage models have been used to develop mesomechanical RVE of 3D woven composites and very thick composite structures in modeling damage at both meso- and macro-mechanical RVE levels. While the fundamental elastic and strength parameters can be determined via standard and nonstandard mechanical testing, in modeling the semi-empirical erosion of finite volume elements to allow penetration, model validating experiments need to be simulated to determine the necessary modeling parameters required for MAT162. Low velocity impact (LVI), ballistic 􀜸􀬹􀬴 testing, and depth of penetration (DOP) experiments have been proven sufficient in determining the modeling parameters. This two part paper will present the methodology of determining the MAT162 properties and parameters by simulating LVI, 􀜸􀬹􀬴, and DOP experiments. Part A will focus on describing the properties & parameters needed for MAT162, and Part B will focus on parametric determination of modeling parameters simulating model validating experiments.