基于不同失效准则的复合材料层合板螺栓接头的极限强度研究
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武汉理工大学交通学院

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Research on ultimate strength of bolted joints of composite laminates based on different failure criteria
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Wuhan university of technology, Institute of transportation

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    摘要:

    研究了基于不同渐进失效准则计算复合材料层合板螺栓连接接头极限承载力的高精确度预报方法。基于ABAQUS有限元软件,采用USDFLD子程序对接头进行渐进失效分析,分别采用了最大应力准则、蔡-希尔准则、霍夫曼准则、蔡-吴准则、哈辛准则五种失效准则进行数值计算,通过建立不同的场变量来表征纤维、基体、界面的损伤状态,进而研究层合板螺栓连接接头在拉伸载荷作用下的损伤发展过程。研究表明,基于这五种失效准则计算下的有限元仿真结果均与实验值均较为接近,其中采用纤维失效和基体失效分开考虑的哈辛准则计算的螺栓连接层合板的极限强度与试验结果的准确度最高,较适用于复合材料螺栓连接结构的有限元仿真。

    Abstract:

    A high-precision prediction method for calculating the ultimate bearing capacity of bolted joints of composite laminates based on different progressive failure criteria is studied. Based on the ABAQUS finite element software, the USDFLD subroutine is used for progressive failure analysis of the joints. Five failure criteria, namely the maximum stress criterion, Tsai-Hill criterion, Hoffman criterion, Tsai-Wu criterion, and Hasin criterion, are used for numerical calculation. Through the establishment of different field variables to characterize the damage state of the fiber, matrix, and interface, and then study the damage development process of the laminate bolted joint under tensile load, and verify the accuracy of the method by comparing with the test results. It is shown that the finite element simulation results calculated based on these five failure criteria are all close to the experimental values. Among them, the ultimate strength of the bolted laminates calculated by the Hasin criterion, which considers fiber failure and matrix failure separately, is the highest accuracy and most suitable for finite element simulation of composite bolted structure.

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  • 收稿日期:2020-12-26
  • 最后修改日期:2020-12-26
  • 录用日期:2021-01-20
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