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本文提供一种对于含有加捻纤维束的复合材料由于固化而产生的热残余应力的分析研究.纤维束中的纤维经过加捻产生了一种螺旋形状,这种形状所产生的三维热弹性力学问题可以利用能量法获得解答.这个问题的热残余应力场可以表示为纤维、基体材料的性质以及纤维束几何参数的函数.纤维/基体界面上的残余应力(包括环向和径向的应力)都可以从这些分析中得到.本文分析的结果表明:加捻纤维束构成的复合材料,由于纤维的适当加捻,可以减弱由于纤维与基体各具不同的热膨胀系数而产生的热固化残余应力.
This paper presents an analytical study of the thermal residual stresses caused by the solidification of composites containing twisted fiber bundles. The fibers in the fiber bundles are twisted to produce a helical shape. The resulting three-dimensional thermoelasticity The problem can be solved using the energy method The thermal residual stress field for this problem can be expressed as a function of the fiber, the properties of the matrix material and the geometry of the fiber bundle Residual stresses (including hoop and radial stresses) at the fiber / Can be obtained from these analyzes.The results of this paper show that the composites composed of twisted fiber bundles can reduce the thermosetting residual stress due to the different thermal expansion coefficients between fiber and matrix due to proper twisting of the fibers.