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复合材料加筋壁板装配应力对结构失效影响的试验与数值分析 被引量:3

EXPERIMENTAL AND NUMERICAL ANALYSIS OF THE EFFECT OF ASSEMBLY STRESS ON THE COMPOSITE STIFFENED PANEL FAILURE
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摘要 复合材料层压板由于各向异性及沿厚度方向的不连续性的特点,在承受面外载荷作用下,会产生层间应力。层间应力值超过层压板层间开裂强度时,层压板会发生层间分层现象。为了研究装配应力对加筋壁板破坏行为的影响,本文进行了相应的试验和数值分析。首先对加筋壁板结构进行静力加载试验,得到了试验件的破坏载荷和破坏模式。其次通过螺栓加载至工况载荷并保载一定时间,实现了保载试验。最后利用有限元分析了结构的应力分布规律。结果显示,试验件在静力载荷的作用下会发生共胶接区脱粘破坏并伴随缘条分层破坏,在保载作用下长桁下缘条产生了微分层现象,数值分析获取的应力分布规律与试验结果吻合良好。研究结果可为复合材料壁板的装配作业规范和铺层方案设计验证提供参考。 Composite laminates are anisotropic and discontinuous along the thickness.Interlaminar stress exists in the composite laminate under out-plane loading.Delamination would happen where the out-plane stress is over interlaminate strength.In order to study the effect of out-of-plane compression load on the failure behavior of stiffened wall structure,corresponding experimental and numerical analyses were performed.Firstly,the failure load and failure mode of the specimens were obtained by the static loading test for the stiffened wall structure.Secondly,the structures were loaded to the working load through the bolts and maintained for a certain period of time.Finally,the finite element method was utilized to analyze the stress distribution of the structures.The results show that co-bonded area debonding and edge strip delamination would occur under the static load,slightly delamination was detected in the lower edge strip of the truss under the working load,and the qualitative agreement between the experimental and the numerical results was reasonably good.The research results provided references for the assembly operation specification and laminate design verification of composite structure.
作者 王世杰 陈振 徐鹏 刘小林 汪海 WANG Shi-jie;CHEN Zhen;XU Peng;LIU Xiao-lin;WANG Hai(Shanghai Aircraft Manufacturing Co.,Ltd.,Shanghai 200436,China;Shanghai Aeronautical Materials and Structures Testing Co.,Ltd.,Shanghai 201318,China)
出处 《复合材料科学与工程》 CAS 北大核心 2021年第4期96-101,共6页 Composites Science and Engineering
基金 国家商用飞机制造工程技术研究中心创新基金(COMAC-SFGS-2017-36738)。
关键词 复合材料 加筋壁板 装配应力 缘条分层 试验 数值分析 composite stiffened panel assembly stress chord delamination experiment numerical analysis
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