仝伟，李泽远，常国，陈林

( 内蒙古科技大学材料与冶金学院，内蒙古包头014010)

关键词: 重轨; 矫直; 残余应力; 数值模拟

中图分类号: U213. 4 文献标识码: A

摘要: 应用有限元模拟软件ABAQUS 对材料为U75V、弦高为80 mm 的重轨，在标准规程20． 9-13． 2-5． 6-5． 4 下进行矫直数值模拟，分别分析了重轨在整个矫直过程的内部应力形成机理及变化规律．结果表明: 在各个矫直变形区内，轨头和轨底受到的应力较大，轨腰处的应力较小，且矫后钢轨内部残余应力在轨底为最大是242 MPa．

The numerical simulation and analysis of residual stress evolution in the heavy rail straightening process

TONG Wei，LI Ze-yuan，CHANG Guo，CHEN Lin

( Materials and Metallurgy School，Inner Mongolia University of Science and Technology，Baotou 014010，China)

Key words: heavy rail; straightening; residual stress; the numerical simulation

Abstract: The straightening process of Heavy rail of U75V and 80 mm of chord height was simulated under standard press down procedures 20． 9-13． 2-5． 6-5． 4 by using the finite element simulation software ABAQUS． The internal residual stress formation mechanism and change rule in the heavy rail straightening process were studied． The results indicate that the stress at the rail head and bottom is large，in the waist place of the rail the stress is small，and on the surface of the rail bottom the maximum residual stress after strengthening is 242 Mpa．