张一峰,李德君,熊毅,任凤章

• 1:河南科技大学材料科学与工程学院
• 2:中国石油集团石油管工程技术研究院
• 3:石油管材及装备材料服役行为与结构安全国家重点实验室

摘要(Abstract)：

20G钢和TRIP钢两种材质膨胀管胀后挤毁强度存在差异，本文主要从两种管材的包申格效应和膨胀后的残余应力来分析两种膨胀管胀后挤毁强度的差异。拉伸压缩试验表明，两种管材大变形后仍具有明显的包申格效应，包申格效应明显降低膨胀管的挤毁强度，但包申格效应不是TRIP钢挤毁强度低于20G钢的原因。环切法测得20G钢膨胀管胀后的环向残余压应力小于TRIP钢，因环向残余压应力会降低挤毁强度，所以胀后20G钢的挤毁强度高于TRIP钢。有限元仿真结果显示胀后20G的环向残余压应力小于TRIP钢，与环切法试验的结果一致，测试与仿真结果得到相互印证。

关键词(KeyWords)： 挤毁强度;包申格效应;残余应力;有限元仿真

Abstract:

Keywords:

基金项目(Foundation): 国家重点研究计划(2020YFB1713500)

作者(Author): 张一峰,李德君,熊毅,任凤章

DOI: 10.13289/j.issn.1009-6264.2022-0179

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