| 残余应力场对焊接动态变形的影响 |
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| 引用本文： | 马杭,高玉阳.残余应力场对焊接动态变形的影响[J].兰州理工大学学报,1988(3). |
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| 作者姓名： | 马杭 高玉阳 |
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| 作者单位： | 甘肃工业大学机械工程一系
(马杭)，甘肃工业大学机械工程一系(高玉阳) |
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| 摘 要： | 通过一组窄板小型焊接变形试验,证明了残余应力场对焊接构件的动态变形过程,因而也对焊件最终的残余变形有着不可忽视的影响。其机理为:焊接过程中力学熔池的运动干扰了焊件中原有残余应力场的平衡,引起焊件的附加变形。附加变形既改变了焊件高温区的压缩塑性变形,又改变了焊件冷却阶段的变形。
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| 关 键 词： | 残余应力场 焊接变形 内应力平衡 力学熔池 附加变形 挠度 |
The Effect of Residual Stress Fields on the Dynamic Distortion of Weldments |
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| Ma Hang,Gao Yuyang First Mechanical Engineering.The Effect of Residual Stress Fields on the Dynamic Distortion of Weldments[J].Journal of Lanzhou University of Technology,1988(3). |
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| Authors: | Ma Hang Gao Yuyang First Mechanical Engineering |
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| Abstract: | It was verified by a set of welding distortion tests with narrow plates that the effect of residual stress field existed previously in the weldments on the dynamic distortion and, consequently, on the residual distortion of weldments cannot be neglected. The mechanism of this effect could be expressed as follows: the movement of the mechanical melting pool during welding process makes a significant influence on the balance of the original interior stress field in weldments, which brings about an additional distortion of the weldments. Thus both the compressive plastic strain at the high temperature zone and the contraction of weldments during cooling are changed. |
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| Keywords: | residual stress field welding distortion interior stress balance mechanical melting pool additional distortion deflection |
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