Characterization of Damage Resistance and Damage Tolerance of Composite Materials

摘要

A lot of experimental data showed that CAI was an ambiguous physical quantity, and could not to guide development of material systems and selection of materials during structural design. The research by authors showed that the damage resistance behavior and damage tolerance behavior of composite systems are corresponding to the design requirements of durability (against impact) and damage tolerance of composite structures, respectively. They can be characterized using the maximum contact force of the static contact force ～ dent depth curve, F_(max) and the threshold of the dent depth ～ compression failure strain curve, CAIT (Compression failure strain After Impact Threshold), respectively.