含损缝合复合材料加筋壁板后屈曲分析方法研究及优化设计

项目名称： 含损缝合复合材料加筋壁板后屈曲分析方法研究及优化设计

项目编号： No.51305351

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 机械、仪表工业

项目作者： 王佩艳

作者单位： 西北工业大学

项目金额： 26万元

中文摘要： 复合材料加筋壁板表现出优异的后屈曲性能，设计中考虑后屈曲承载能力，可以提高结构的使用效率。复合材料在加工、运输、使用和维护过程中会产生各种损伤，研究含损复合材料的性能是损伤容限设计的关键。本项目以含损缝合复合材料加筋壁板为对象，研究在压缩载荷作用下加筋壁板后屈曲阶段损伤扩展和破坏的机理，根据后屈曲过程中发生的各种损伤形式，设计细观试验，建立损伤产生和扩展的失效模型；考虑缝线的断裂、蒙皮-筋条的脱粘、纤维基体损伤和分层等多种损伤类型，研究含损缝合复合材料加筋壁板后屈曲承载能力的整体-局部分析方法；根据制造缺陷、许用损伤限制、临界损伤门槛和离散源损伤等状态下的设计要求，在考虑后屈曲承载能力的基础上，研究含损缝合复合材料加筋壁板的损伤容限设计方法。本项目的研究将开发含损缝合复合材料加筋壁板优化设计系统，为复合材料损伤容限设计提供快速可靠的设计方法，从而加快设计流程，降低设计成本。

中文关键词： 缝合复合材料加筋壁板；后屈曲承载能力；断裂能量释放率；优化设计；

英文摘要： Stiffened composite panels have a high post-buckling strength capacity, and it is needed for a reasonable use in composite structure design. In the process of manufacture, transport, use, and maintenance, various damages may be occurred in composite materials, and the performance of composite structure containing damage is the key point of damage tolerance design. The damage propagation and failure mechanism of stitched composite stiffened panels containing damage (SCSPD) in the stage of post-buckling will be investigated in this project. Microscopic tests are designed according to different damage modes in the process of post-buckling, and the failure model of damage initiation and propagation is built. Considering multiple damage modes, such as the fracture of stitches, debonding between skin and ribs, the damage of fibre and matrix, the global-local methods of analyzing post-buckling load-carrying capacities of SCSPD will be studied. Based on the design requirements of different damage modes and post-buckling load-carrying capacity, the fast optimal design method of SSCPD is investigated. The project will develop an optimal design system of SCSPD to provide fast and reliable methods for damage tolerance design of composite structures, which will save design time and reduce design cost.

英文关键词： Stitching composite stiffed panel；Post buckling load capacity；Fracture energy release rate；Optimization and design；