【摘要】 本文(2)首先应用拉普拉斯变换和留数定理对薄塞圆管在由横截面扭矩引起的剪切应变和继而由内压的加载、卸载、重新加载引起的周向应变的多轴应变路径下的塑性响应进行了分析,并给出了响应曲线。尔后基于文(1)和前述结果,应用内时疲劳能量原理,得到了疲劳寿命的计算公式,并给出了数值例子。所得结果是令人满意的。更多还原

【Abstract】 First, the plastic response of thin circular tube under prestrainin shear caused by torsional moment in cross section and followed by circumferentialstrain caused by loading, Uuloading and reloading of internal pressure are analysedby Laplace transformation and residue theorem.The response curves are illustrated.Based on paper (1) and Previous results, then, the aanalytical expressions used forestimating fatigue life are obtained by using the energy principle of endochronicfatigue, and the numerical examples are given. The resulls obtained are satisfactory.更多还原