摘要
针对玻璃纤维泡沫夹芯结构关于维修结构性能研究的缺失,本研究完成了玻纤泡沫夹芯板的维修和弯曲性能测试,并在试验基础上建立了结构有限元模型,进行了强度与刚度的试验数据验证。得到结论如下:通过试验结果,简化了有限元分析模型中的胶层设置;将泡沫芯体和玻纤面板的破坏载荷作为结构的初始与最终破坏载荷,仿真计算的破坏载荷较试验平均载荷超出18.92%,较最大试验破坏载荷超出7.14%;应用线性阶梯载荷步表征模型的应变趋势,在线性变形区域与试验符合较好,在受压面板,最大偏差为11.2%,在受拉面板,最大偏差为24.3%。表明该玻璃纤维泡沫夹芯修补结构的有限元模型分析精度较高,具有较强的工程实用性。
For the lack of study on adhesively repaired foam core sandwich composite,a three-dimensional finite element analysis model and corresponding bending experiments verification were developed for the adhesively repaired foam core sandwich composite.The setting of adhesive in finite element model is simplified by test results.The failure load of foam and panel is taken as the initial and ultimate failure load of the repaired structure.The simulated failure load is 18.92%higher than the average test load and 7.14%higher than the maximum test failure load.The strain trend characterization of the model was established by linear loading step,the maximum deviation is 11.2%in the compression laminate and 24.3%in the tension laminate.The conclusion shows that the finite element model of adhesively repaired foam core sandwich composite is feasible and available.
作者
刘国春
庞杰
杨文锋
孙婷
LIU Guo-chun;PANG Jie;YANG Wen-feng;SUN Ting(Civil Aviation Flight University of China,Guanghan 618307,China)
出处
《复合材料科学与工程》
CAS
北大核心
2020年第2期76-80,共5页
Composites Science and Engineering
基金
四川省教育厅项目(18ZB0689)
四川省科技厅军民融合重点研发项目(2018GZ0497)
关键词
胶接修补
泡沫夹芯结构
弯曲性能
有限元分析
adhesively repaired
foam core sandwich composite
bending performance
finite element analysis
