Impact Damage in Curved Laminated Composites

将进行分析和实验研究， 纤维增强层合复合材料的冲击损伤和 曲率和铺层方向对损伤的影响。 的 分析将能够预测损害的程度和类型， 平的和弯曲的复合结构由于瞬态动态冲击。 层合板中的应力和应变将由一个建议的 有限元法是基于瞬态动力分析， 材料和几何非线性的考虑。 失败 将被预测和损害的进展将被模拟， 提出失效分析。 故障分析将包括 面内损伤和动态断裂的连续介质力学方法 分层增长和停止模型。 用户友好的计算机代码 在此过程中，将根据分析结果制定 调查 该代码可以作为一个设计工具来评估 给定复合材料结构抗冲击性，并选择最佳 用于给定应用的复合结构的配置。 平面和曲面复合结构的实验测试也将在 进行评估模型和计算机的有效性 模拟

An analytical and experimental investigation will be performed to study the impact damage in fiber-reinforced laminated composites and the effects of their curvature and ply orientation on the damage. The analysis will be able to predict the extent and the types of damage in flat and curved composite structures due to transient dynamic impact. Stresses and strains in laminates will be calculated by a proposed finite element method which is based on transient dynamic analysis with the consideration of material and geometric nonlinearities. Failure will be predicted and damage progression will be simulated by the proposed failure analysis. The failure analysis will include a continuum mechanics approach for in-plane damage and a dynamic fracture model for delamination growth and arrest. A user friendly computer code based on the analysis will be developed during the course of this investigation. The code could serve as a design tool to evaluate the impact resistance of given composite structures and to select optimal configurations of composite structures for a given application. Experimental tests of flat and curved composite structures will also be performed to assess the validity of the model and the computer simulations.