The testing on the bearing strength of single-shear bolt jointed composite laminates structure is done.And the effect of the fixture on the testing results is analyzed. Then a macro-micro multi-scale analytical model ...The testing on the bearing strength of single-shear bolt jointed composite laminates structure is done.And the effect of the fixture on the testing results is analyzed. Then a macro-micro multi-scale analytical model combined with the improved"Generalized Method of Cells( GMC) "is developed,which is used to predict the macro bearing strength and to characterize the micro constitute material failure of the bolt jointed composite laminates structure. Both the contact conditions at the bolt/hole boundary and the contact conditions at the specimen/fixture boundary,progressive damage,and the material properties degradation are all taken account into the analytical model. Thus,the numerical simulation results agree well with the experimental results.Finally,the effect of the fixture on the testing results is characterized. The results show that the incomplete contaction between the fixture and the specimen or the lack of the lateral constraint on the specimen will affect the limited bearing strength and the offset bearing strength of the bolt jointed composite laminates structure. In addition,the lower support rigid of the fixture will affect the rigid of the bolt jointed composite laminates structure.展开更多
纤维增强树脂基复合材料层压板的压缩强度和压缩模量是复合材料结构设计、制造和使用维护的基本力学性能参数,为新材料研发、质量控制和结构设计提供重要依据。而不同压缩性能测试方法对其最终性能指标有重要的影响,甚至得出截然不同的...纤维增强树脂基复合材料层压板的压缩强度和压缩模量是复合材料结构设计、制造和使用维护的基本力学性能参数,为新材料研发、质量控制和结构设计提供重要依据。而不同压缩性能测试方法对其最终性能指标有重要的影响,甚至得出截然不同的结果。针对以上问题,通过对现有不同复合材料压缩性能测试方法的系统分析与讨论,结合相关测试经验,通过改进ASTM D 6641和GB/T 5258中组合式加载(CLC)测试夹具,优化了CLC加载测试复合材料的压缩性能的方法,提高了复合材料压缩性能测试方法的准确性、有效性和操作简便性,对纤维增强树脂基复合材料的开发与结构设计等具有重要的现实意义。展开更多
The composite researchers are paying more attention to in situ reacted composites owing to their achievements, such as simpler fabrication process, lower cost of fabrication, and more excellent and controllable mechan...The composite researchers are paying more attention to in situ reacted composites owing to their achievements, such as simpler fabrication process, lower cost of fabrication, and more excellent and controllable mechanical properties. Recently, in situ MMCs studies are concentrated on making full use of dispersion strengthening of in展开更多
基金Sponsored by the National Natural Science Foundation of China(Grant No.11272105)the Heilongjiang Province Science Foundation for Youths(Grant No.QC2015003)the Harbin Science and Technology Bureau Young Talent Reserve Project(Grant No.RC2016QN001011,RC2016QN017023)
文摘The testing on the bearing strength of single-shear bolt jointed composite laminates structure is done.And the effect of the fixture on the testing results is analyzed. Then a macro-micro multi-scale analytical model combined with the improved"Generalized Method of Cells( GMC) "is developed,which is used to predict the macro bearing strength and to characterize the micro constitute material failure of the bolt jointed composite laminates structure. Both the contact conditions at the bolt/hole boundary and the contact conditions at the specimen/fixture boundary,progressive damage,and the material properties degradation are all taken account into the analytical model. Thus,the numerical simulation results agree well with the experimental results.Finally,the effect of the fixture on the testing results is characterized. The results show that the incomplete contaction between the fixture and the specimen or the lack of the lateral constraint on the specimen will affect the limited bearing strength and the offset bearing strength of the bolt jointed composite laminates structure. In addition,the lower support rigid of the fixture will affect the rigid of the bolt jointed composite laminates structure.
文摘纤维增强树脂基复合材料层压板的压缩强度和压缩模量是复合材料结构设计、制造和使用维护的基本力学性能参数,为新材料研发、质量控制和结构设计提供重要依据。而不同压缩性能测试方法对其最终性能指标有重要的影响,甚至得出截然不同的结果。针对以上问题,通过对现有不同复合材料压缩性能测试方法的系统分析与讨论,结合相关测试经验,通过改进ASTM D 6641和GB/T 5258中组合式加载(CLC)测试夹具,优化了CLC加载测试复合材料的压缩性能的方法,提高了复合材料压缩性能测试方法的准确性、有效性和操作简便性,对纤维增强树脂基复合材料的开发与结构设计等具有重要的现实意义。
基金State Key Laboratory of Metal Matrix Composites of shanghai Jiaotong University Laboratory of Solid State Microstructures of Nanjing University.
文摘The composite researchers are paying more attention to in situ reacted composites owing to their achievements, such as simpler fabrication process, lower cost of fabrication, and more excellent and controllable mechanical properties. Recently, in situ MMCs studies are concentrated on making full use of dispersion strengthening of in
