首页> 外文期刊>Journal of Thermoplastic Composite Materials >Creep Analysis of an Isotropic Rotating Al-SiC Composite Disc taking into Account the Phase-specific Thermal Residual Stress
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Creep Analysis of an Isotropic Rotating Al-SiC Composite Disc taking into Account the Phase-specific Thermal Residual Stress

机译:考虑各相热残余应力的各向同性旋转Al-SiC复合材料圆盘的蠕变分析

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摘要

Analysis of steady-state creep in a rotating disc made of Al-SiC_p composite has been carried out using isotropic Hoffman yield criterion and the results obtained are compared with those using von Mises yield criterion ignoring difference in yield stresses. The material parameters characterizing difference in yield stresses have been used from experimental results of other studies. The stress and strain rate distributions developed due to rotation have been calculated and compared for both the criteria. It is observed that the stress distribution is not too much affected due to presence of phase specific thermal residual stress. The presence of residual stress has contributed to an increase in the tangential strain rate particularly in the region near the outer radius of the disc, as compared to the tangential strain rate in the disc without residual stress. The radial strain rate, which is compressive, changes significantly due to the presence of residual stress and even becomes tensile in the middle of the disc. It is thus concluded that the presence of residual stress significantly affects the creep in an isotropic rotating disc.
机译:已经使用各向同性霍夫曼屈服准则对由Al-SiC_p复合材料制成的旋转盘进行了稳态蠕变分析,并将所得结果与使用冯·米塞斯屈服准则的结果进行了比较,忽略了屈服应力的差异。根据其他研究的实验结果,已使用表征屈服应力差异的材料参数。已经计算了由于旋转而产生的应力和应变率分布,并针对这两个标准进行了比较。可以看出,由于存在相特定的热残余应力,应力分布不会受到太大影响。与没有残余应力的圆盘中的切向应变率相比,残余应力的存在尤其是在圆盘外半径附近的区域中引起切向应变率的增加。由于残余应力的存在,压缩的径向应变率发生了显着变化,甚至在圆盘的中间变得张紧。因此得出结论,残余应力的存在会显着影响各向同性旋转圆盘的蠕变。

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