一种新的机械自紧厚壁圆筒塑性半径计算方法

兵工学报 ›› 2011, Vol. 32 ›› Issue (11): 1405-1410.

一种新的机械自紧厚壁圆筒塑性半径计算方法

常列珍¹，潘玉田²，马新谋²

(1.中北大学力学系，山西太原 030051;2.中北大学动力机械系，山西太原 030051)

收稿日期:2010-11-11 修回日期:2010-11-11 上线日期:2014-05-04
通讯作者: 常列珍 E-mail:clzmxm@163.com
作者简介:常列珍(1978—)女，讲师

A New Method for Calculating Plastic Radius of Swage Autofrettage Thick-walled Cylinder

CHANG Lie-zhen¹， PAN Yu-tian²， MA Xin-mou²

(1.Department of Mechanics, North University of China, Taiyuan 030051, Shanxi，China;2.Department of Power Mechanical Engineering, North University of China, Taiyuan 030051, Shanxi，China)

Received:2010-11-11 Revised:2010-11-11 Online:2014-05-04
Contact: CHANG Lie-zhen E-mail:clzmxm@163.com

摘要/Abstract

摘要： 为推导一种新的机械自紧厚壁圆筒塑性半径的计算公式，首先采用ANSYS对不同摩擦系数的机械自紧进行数值模拟，发现摩擦系数对残余应力和塑性半径无影响，因此在推导塑性半径计算公式时可不考虑摩擦系数的影响；其次根据机械自紧过程中冲头圆柱段和厚壁圆筒接触处径向应力相等推导出了塑性半径的计算公式。利用该公式计算了9个不同模拟管的塑性半径，结果表明理论值与实验值吻合良好。该公式可根据过盈量求出塑性半径和自紧度，或者在已知自紧度的情况下确定过盈量。

关键词: 固体力学, 机械自紧, 厚壁圆筒, 过盈量, 塑性半径

Abstract: To derive a new formula to calculate the plastic radius of autofrettaged thick-walled cylinder, some simulations were run for different friction coefficients. It was found that the friction coefficient did not influence the residual stress and plastic radius. Thus, it is unnecessary to consider the effect of the friction coefficient in deriving the new formula of plastic radius. Also, considered that the radial stress in contact section of swage and thick-walled cylinder are equal during the swage procedure, the formula of plastic radius was derived. By using the formula, the plastic radius of nine different tubes were calculated. It is shown that the theoretical values of plastic radius coincide with the experiment results better. This formula can be used to calculate the plastic radius and over strain according to the excess, or determine the excess according to the overstrain.

Key words: solid mechanics, swage autofrettage, thick-walled cylinder, excess, plastic radius

中图分类号:

TB125

常列珍，潘玉田，马新谋. 一种新的机械自紧厚壁圆筒塑性半径计算方法[J]. 兵工学报, 2011, 32(11): 1405-1410.

CHANG Lie-zhen， PAN Yu-tian， MA Xin-mou. A New Method for Calculating Plastic Radius of Swage Autofrettage Thick-walled Cylinder[J]. Acta Armamentarii, 2011, 32(11): 1405-1410.

参考文献

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