DAMAGE AND IMPACT SIMULATION OF TEXTILE REINFORCED COMPOSITES USING FEA

摘要

Several studies have pointed out the numerous advantages of using composite materials for impact loaded structures. With carefully tailoring, the composite structures provide a much better response to impact loads than metal components and bring additional advances concerning weight savings and structural stiffness. Unfortunately, one of the greatest challenges still facing optimised usage of composite materials in impact loaded structures are related to insufficient simulation capabilities. Most of the optimisation performed so far were achieved via expensive and difficult to evaluate experimental tests. To overcome those difficulties for available commercial explicit FEM codes, new material models have been developed in the last years that account for many of the failure and post-failure behaviour of composite structures under impact loading. These models are mostly based on non-local damage description. The present paper deals with the study and verification of a non-local damage model, which has recently been implemented in LS-DYNA for solid elements and of its capabilities to predict plate bending impact in composite laminates.