摘要
基于整体中空夹层复合材料的织物结构特点以及对经纬向弯曲变形现象的分析,建立两种夹层梁模型,分别推导了经向与纬向弯曲刚度的解析表达式。通过理论解、有限元解以及试验值的对比,验证了模型的合理性和准确性。在此基础上,运用本文理论方法探讨了纱线密度对整体中空夹层复合材料弯曲刚度的影响。研究表明,随着纱线密度的增加,整体中空夹层复合材料经纬向弯曲刚度均呈线性增加;经向弯曲刚度的影响因素按影响程度从大到小依次为经纱、绒经、纬纱;纬向弯曲刚度的影响因素按影响程度从大到小依次为纬纱、经纱、绒经;和纬向弯曲相比,绒经对经向弯曲刚度的影响更大。
Based on the structure characteristics of the hollow integrated sandwich composites and the analysis of warp and weft bending deformation,two kinds of sandwich beam models were established and the analytical expressions of warp and weft bending stiffness were derived,respectively. By comparing the theoretical solution,the results of FEM and experimental results,the accuracy and rationality of the models were verified. On this basis,influence of yarn density on bending stiffness was discussed by using this paper＇s theoretical method. The results show that the warp and weft bending stiffness of the hollow integrated sandwich composites increase linearly with the increase of the yarn density. The influence factors of the warp bending stiffness from large to small is as follows： warp,pile and weft. The influence factors of the weft bending stiffness from large to small is as follows： weft,warp and pile. The influence of pile on warp stiffness is greater than that on the weft bending.
出处
《玻璃钢／复合材料》
CAS
CSCD
北大核心
2016年第9期70-74,共5页
Fiber Reinforced Plastics/Composites
基金
江苏省高校优势学科建设工程项目资助(PAPD)
南京航空航天大学研究生创新基地(实验室)开放基金(kfjj20160111)
中央高校基本科研业务费专项资金
关键词
整体中空
弯曲刚度
理论方法
hollow integrated
bending stiffness
theoretical solution
