北京航空航天大学学报

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剪切载荷下带口盖加筋复合材料壁板设计分析

郭俊1,关志东2,邱诚1,孙伟1   

  1. 1. 北京航空航天大学
    2. 北京航空航天大学航空科学与工程学院
  • 收稿日期:2015-07-15 修回日期:2015-09-18 发布日期:2015-10-09
  • 通讯作者: 关志东

Analysis and design of composite stiffened panel with cover under shear load

  • Received:2015-07-15 Revised:2015-09-18 Published:2015-10-09

摘要: 采用试验和有限元方法研究了带口盖加筋复合材料壁板的剪切性能。试验和数值计算研究结果表明:当达到屈曲载荷时,结构各个区域同步发生屈曲,最终破坏位置位于加强筋条以外的复合材料壁板区域。在带口盖加筋复合材料壁板有限元模型的基础上,改变补强区域铺层层数以及口框厚度,然后对由此得到的有限元模型进行了有限元模拟分析,以此来研究补强区域铺层层数和口框厚度对于带口盖加筋复合材料壁板的影响。计算结果表明:随着补强区域铺层层数以及口框厚度的增加,结构的承载能力随之提高,但是结构破坏时的屈曲模态有所变化。并且,虽然增加口框厚度加工较易,但会使得结构重量有较大程度的提高,所以在考虑结构重量的前提下优先选用增加补强区域铺层层数的方法。

关键词: 口盖, 加筋, 复合材料, 剪切试验, 有限元分析

Abstract: The shear properties of composite stiffened panel with cover were investigated through experiments and FEM methods. Experimental and numerical results reflect that the buckling loads of different regions of the specimen are almost the same and the final failure occurs at the composite skin outside the stiffeners. Based on the model of composite stiffened panel with cover, the simulation of the models with different reinforcement plies and different frame thicknesses were conducted to investigate the effects of the reinforcement plies and frame thickness on composite stiffened panel with cover. The numerical results show that with the increase of the reinforcement plies and frame thickness, the load-carrying capacity of the structure get increased. Meanwhile, some changes happen to the buckling modes. In addition, the increase of the frame thickness can bring about more weight penalty, so to increase the reinforcement plies is preferable when considering the structural weight.

Key words: cover, stiffener, composite panel, shear experiment, finite element method

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