The use of composites in vehicle structures has been limited by the matrix response to cyclic and/or impact loading. Both of these loading cases, while different in their methods of application elicit similar debilitating response in the composite, I.e. matrix cracking and delamination. This paper will outline the approach taken to improve the matrix response, nominally called toughness. This improvement will lead to laminates and parts with longer life after hit or improved response to hit after life which for the purpose of this paper is here named Durability. The approach consists of an appraisal of existing tests/ test specimen to measure the appropriate properties; and an appraisal of existing models to assess their ability to predict improvements. A new test method is being assessed using the same methodology. Finally new materials/ material concepts are being studied to move toward improving the matrix response to cyclic/ impact loading.
展开▼
