论文

变厚度复合材料加筋板轴压试验及分析方法

  • 高伟 ,
  • 刘存 ,
  • 陈顺强
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  • 航空工业第一飞机设计研究院, 西安 710089

收稿日期: 2021-12-07

  修回日期: 2021-12-24

  网络出版日期: 2022-04-06

Axial compression test and analysis method of composite stiffened plates with variable thickness

  • GAO Wei ,
  • LIU Cun ,
  • CHEN Shunqiang
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  • AVIC The First Aircraft Institute, Xi'an 710089, China

Received date: 2021-12-07

  Revised date: 2021-12-24

  Online published: 2022-04-06

摘要

针对变厚度复合材料加筋板轴压屈曲及后屈曲特性进行试验研究,并采取工程分析法、特征值屈曲法、分段处理后屈曲法和渐进损伤失效法对其进行承载能力计算分析,进而将计算结果与试验结果进行对比。研究结果表明:变厚度复合材料加筋板长桁对蒙皮的支持简化成固支较简支更为合理,采用两加载边简支、两侧边固支正交各向异性矩形层压板理论求解的计算值与试验值误差为-13.9%;引入折减宽度概念,可以有效考虑加筋板变厚度区域刚度对蒙皮屈曲特性的影响,变厚度加筋板工程分析法求解精度得到进一步提高;分段处理后屈曲法和考虑就地效应及横向应力分量构造的仿真失效模型能准确预测变厚度加筋板后屈曲承载能力,误差分别为7.1%和5.9%,后屈曲承载能力约为初始屈曲载荷的1.27倍,说明变厚度加筋板屈曲后仍然具有一定的后屈曲承载能力。

本文引用格式

高伟 , 刘存 , 陈顺强 . 变厚度复合材料加筋板轴压试验及分析方法[J]. 航空学报, 2022 , 43(11) : 526764 -526764 . DOI: 10.7527/S1000-6893.2022.26764

Abstract

The axial compression buckling and post buckling characteristics of variable thickness composite stiffened plates are experimentally studied. The bearing capacity of the plate is calculated and analyzed by the engineering analysis method, eigenvalue buckling method, piecewise post buckling method and progressive damage failure method, and then the calculation results are compared with the test results. The results show that it is more reasonable to simplify the support of variable thickness composite stiffened plate stringer to fixed support than to simple support. The error between the calculated value and the experimental value is -13.9%. By introducing the concept of reduced width, the influence of the stiffness of the variable thickness region of the stiffened plate on the buckling characteristics of the skin can be effectively considered, and the accuracy of the engineering analysis method of the variable thickness stiffened plate can be further improved. The piecewise post buckling method and the simulation failure model considering the local effect and transverse stress component can accurately predict the post buckling capacity of variable thickness stiffened plates, with errors of 7.1% and 5.9%, respectively. The post buckling capacity is about 1.27 times of the initial buckling load, indicating that the variable thickness stiffened plate still has a certain post buckling capacity after buckling.

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