【自增强圆筒残余应力在温度场中变化规律的试验研究】吴旭.pdf
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temperature o inner is higher than that outer watt,his paper made the experiments on thick-.walled cylinders with the inner diameter of and thedi-ameter ratiOf 1-8.The naterial oftie experimentat cylinders isOrNiMoVA cyhinders took the Same autofrettagecverstrain then being neated in the
一摘 要 圆筒经过自增强(Autorettage)处理后沿壁厚产生一 这是自增強处理方法最为突出的优点。然而,对于长期处于高温或 中温操作的容器)自增強残余应力在温度场的作用下会随时间发生 或多或少的衰减因此容器在温度环境中操作一段时间后,残余 应力究竟还剩余多少？自增強的永久收盆能有多大？这显然是自增 強理论中急需解决的问题之一.本文利用金属材科在高温下的松弛和蠕变特生:结合自增强圆 筒的实际情况,提出了一个半经验公式:Gx- 式中 2(1+μ) 2(1+)丑 利用该公式可较准确地估计自增强圆筒在温度场(沿壁厚有径向温