摘要
与层合结构相比,蜂窝夹层结构的材料构成、结构形式和力学行为更复杂。为了提高对蜂窝夹层结构力学性能预测的准确性,分析了共固化蜂窝夹层结构的面板形貌和力学性能,并以此为基础建立长梁弯曲有限元渐进失效分析模型,实现对长梁弯曲载荷、变形以及破坏模式的预测。结果表明,共固化蜂窝夹层结构的面板与采用相同预浸料、铺层数量和固化工艺单独成型的层压板相比,单层厚度更薄,压缩强度更低。以此为基础确定了模型的几何结构和材料参数,保证了对长梁弯曲性能预测的准确性,弯曲极限载荷及445 N时变形的预测值与试验结果误差在±11%范围内,破坏位置与试验结果较为吻合。
The material composition,structural form,and mechanical behavior of honeycomb sandwich structures are more complex compared to laminated structures.In order to improve the accuracy of predicting the mechanical performance for honeycomb sandwich structures,the microscopic structure and mechanical properties of the panels of co-cured honeycomb sandwich structure were analyzed.On this basis,the finite element progressive failure analysis model of long beam bending was established to predict the bending load,deformation,and failure mode.The results show that,compared to the laminate molded separately using the same prepreg,number of plies and curing process,the panels of co-cured honeycomb sandwich structure have a thinner single layer thickness and lower compression strength.The geometric structure and material parameters of the model are determined on this basis,thus ensuring the accuracy of the prediction.Comparison of predicted values with test results for ultimate bending load and the deformation at 445 N,the error values are within±11%,and the failure location is in good agreement with the experiment.
作者
牛芳旭
孙超明
贺靖
尹航
NIU Fangxu;SUN Chaoming;HE Jing;YIN Hang(Beijing Composite Materials Co.,Ltd.,Beijing 102101,China)
出处
《复合材料科学与工程》
北大核心
2025年第2期34-39,128,共7页
Composites Science and Engineering
基金
中国建材集团攻关专项资助(2021YCJS02)。
关键词
蜂窝夹层结构
共固化
长梁弯曲
渐进失效分析
有限元
性能预测
复合材料
honeycomb sandwich structure
co-curing
long beam bending
progressive failure analysis
finite element
performance prediction
composites
