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一、前言承受内压作用的厚壁圆筒,若内压在0-p的范围内发生周期性的变化,厚壁圆筒可能产生塑性累积破坏或塑性循环破坏。所谓塑性累积破坏是指在载荷的每一次循环(即由加载到卸载)过程中,厚壁圆筒的某些部位将产生相同符号的塑性变形,经过每次加载与卸载的循环,塑性变形将不断累积,最后达到不允许的程度,导致结构失去承载能力。在以应力分析为基础的工程设计中,将这种塑性变形的不断
I. INTRODUCTION The thick-walled cylinder subjected to the internal pressure, if the internal pressure changes cyclically within the range of 0-p, the thick-walled cylinder may produce plastic cumulative damage or plastic cyclic destruction. The so-called plastic cumulative damage refers to each cycle of the load (that is, from loading to unloading), some parts of the thick-walled cylinder will produce the same symbol of plastic deformation, after each loading and unloading cycle, plastic deformation will Continue to accumulate, and finally reach the level of impermissibility, resulting in the loss of carrying capacity of the structure. In the stress analysis based on the engineering design, the plastic deformation will continue