RESEARCH ON STRAIGHTENING METHOD OF STEPPED PIPE

GAO Feng; ZHOU ZeWei; WANG Long; GUO ZhengLu; LI Yan

doi:10.16579/j.issn.1001.9669.2021.04.031

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RESEARCH ON STRAIGHTENING METHOD OF STEPPED PIPE

更新时间：2022-09-22

- RESEARCH ON STRAIGHTENING METHOD OF STEPPED PIPE
- Journal of Mechanical Strength Vol. 43, Issue 4, Pages: 982-987(2021)
- 作者机构：
  
  1. 西安理工大学机械与精密仪器工程学院陕西省机械制造装备重点实验室
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2021.04.031
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GAO Feng, ZHOU ZeWei, WANG Long, et al. RESEARCH ON STRAIGHTENING METHOD OF STEPPED PIPE. [J]. 43(4):982-987(2021)
DOI：

GAO Feng, ZHOU ZeWei, WANG Long, et al. RESEARCH ON STRAIGHTENING METHOD OF STEPPED PIPE. [J]. 43(4):982-987(2021) DOI： 10.16579/j.issn.1001.9669.2021.04.031.

摘要

针对单弧度弯曲阶梯管件,采用三点过弯压力矫直的修正方式,根据材料弹塑性力学理论,基于双线性强化弹塑性材料本构关系,解析了考虑变截面处应力集中因素的阶梯管件变形过程,推导了矫直行程计算公式。利用有限元软件显示动力学分析的阶梯管件矫直模拟过程以及相应的矫直实验对模型的正确性进行了验证,仿真和实验结果表明,矫直后的阶梯管件具有直线度高,矫直效果好的特点。

Abstract

The three-point bending pressure straightening method is employed to deal with the problem of single curvature bent stepped pipe. Based on the theory of elastoplastic mechanics the analysis of deformation process for the stepped pipe with bilinear strengthening elastoplastic material is performed,in which the effect of stress concentration at the changed cross-section place is considered. Therefore,the calculation formula of straightness stroke is deduced. The correction of the mathematical model is verified by the straightening process simulation based FEM analysis of explicit dynamics in Workbench LS-Dyna software and the corresponding experiment. The simulation and experiment results show that stepped pipe rectified by the proposed method has high straightness,meaning a good straightening affect.

关键词

阶梯管件应力集中矫直行程有限元仿真

Keywords

Stepped pipeStress concentrationStraightening strokeFME simulation

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