Effects of Uneven Wall-Thickness on Creep Lifetime of P92 Steel Pipe Bend Subjected to In-plane Bending

LAN Xiang; XU Hong; YANG Le; NI Yongzhong

doi:10.11973/jxgccl201801016

Materials and Mechanical Engineering > 2018 > 42(1): 78-83,88. > DOI: 10.11973/jxgccl201801016

LAN Xiang, XU Hong, YANG Le, NI Yongzhong. Effects of Uneven Wall-Thickness on Creep Lifetime of P92 Steel Pipe Bend Subjected to In-plane Bending[J]. Materials and Mechanical Engineering, 2018, 42(1): 78-83,88. DOI: 10.11973/jxgccl201801016

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Effects of Uneven Wall-Thickness on Creep Lifetime of P92 Steel Pipe Bend Subjected to In-plane Bending

Ministry of Education Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University, Beijing 102206, China

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Received Date: August 27, 2017
Revised Date: December 03, 2017

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Abstract

Based on high temperature creep test of P92 steel pipe bend subjected to in-plane bending the high temperature creep process of the pipe bend with different eccentricity subjected to in-plane bending was simulated by finite element method. The stress and damage at different positions of the bend were analyzed. The relationship model between the eccentricity of pipe bend and the creep lifetime was established and verified by the experimental results. The results show that the creep life of the pipe bend with extrados reduction increased with the increase of eccentricity and had a linear relationship. The creep life of the pipe bend with flank reduction decreased with the increase of eccentricity and showed a slowing trend. The experimental results verified the accuracy of the relationship model and the relationship model could be used to estimate the creep life of pipe bends with uneven wall-thickness subjected to plane bending accurately.
- uneven wall-thickness,
- bend,
- creep lifetime,
- finite element analysis

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