含分层损伤的船舶复合材料层合板可靠性研究

项目名称： 含分层损伤的船舶复合材料层合板可靠性研究

项目编号： No.51309065

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 水利工程

项目作者： 杨娜娜

作者单位： 哈尔滨工程大学

项目金额： 25万元

中文摘要： 复合材料的力学性能与加工制作过程密切相关，加工缺陷的存在和加工过程中的其他变化都会引起材料力学性能的分散性和随机性。这些缺陷在使用过程中会诱发裂纹产生，导致纤维断裂、基体开裂以及分层裂纹扩展。而且复合材料各向异性强，失效形式多且相互联系的特点使得精确预测复合材料层合板的失效强度非常困难。为此，本文提出的失效模型综合考虑了层合板的面内失效和层间应力引起的分层失效和横向基体开裂，在此基础上采用逐步失效的分析方法对层合板的失效行为进行了数值分析。并建立基于极限承载能力的可靠性分析方法，揭示分层对复合材料层合板结构的可靠性的影响。这将会进一步提高先进复合材料船舶的理论和应用研究水平。这既顺应了现代船舶结构材料的新需求，亦是我国在船舶领域所需面对的关键问题。

中文关键词： 极限强度；可靠性；分层；试验；

英文摘要： The mechanical properties of composite materials are closely related to the production processes. Production defects may cause the dispersion and randomness of the mechanical properties. These defects may induce cracks in service and result in fiber breakage, matrix cracking and delamination. Moreover, it is difficult to accurately predict the failure strength of laminated plates due to their anisotropic properties and various failure modes.The in-plane failure, delamination and out-plane matrix cracking induced by the interlaminar stress, are considered in this project. Progressive failure analysis is used to predict the ultimate strength and reliability analysis is performed based on the ultimate limit state. The method presented in this project investigates the influence of delamination on the strength and reliability of composite structures. The study enhances the theory and practice of composites in ships. This is not only the new demand of modern ships but also key scientific problems faced with the marine industry.

英文关键词： Ultimate strength；Reliability；Delamination；Experiment；