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复合材料波纹夹层结构的弯曲性能研究
Research on flexural properties of composite corrugated sandwich structures
- DOI:
- 作者:
- 陈剑波, 刘敬喜, 刘加一
CHEN Jian-bo, LIU Jing-xi, LIU Jia-yi
- 作者单位:
- 华中科技大学 船舶与海洋工程学院, 湖北 武汉 430074
School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
- 关键词:
- 复合材料;波纹夹层;失效模式
composite material; corrugated sandwich; failure mode
- 摘要:
- 采用单向碳纤维预浸料制备复合材料波纹夹层结构，对其开展三点弯曲试验与有限元仿真计算。试验结果表明，复合材料波纹夹层结构在三点弯曲载荷作用下依次出现了局部损伤、分层失效和纤维断裂3种失效模式。复合材料波纹夹层结构层数越多，相对密度越大，其失效载荷就越大，抗弯曲性能越好。当相对密度从9.55%增加至15.34%时，极限载荷增加了1035.7 N；当相对密度从15.34%增加至20.72%时，极限载荷增加了1070.2 N。同时借助有限元软件进行数值计算，并将数值计算结果与试验结果进行对比，二者吻合较好，引申探讨了不同芯层几何构型对弯曲性能的影响。
A series of composite corrugated sandwich structures were prepared with unidirectional carbon fiber prepreg, and three point bending tests and finite element simulation were carried out.The experimental results show that there are three failure modes of corrugated sandwich composite structure under three-point bending load: local damage, delamination failure and fiber fracture.The more layers the composite corrugated sandwich structure has, the greater its relative density, the greater its failure load and the better its bending resistance.When the relative density increases from 9.55% to 15.34%, the ultimate load increases by 1035.7 N, and when the relative density increases from 15.34% to 20.72%, the ultimate load increases by 1070.2 N.At the same time, the finite element software is used to carry out numerical calculation, and the numerical calculation results are compared with the experimental results, the two are in good agreement, and the influence of different core layer geometry on bending properties is further discussed.
2023,45(9): 41-46 收稿日期：2022-06-08
DOI：10.3404/j.issn.1672-7649.2023.09.009
分类号：U663.9
作者简介：陈剑波(1998-),男,硕士,研究方向为结构设计
