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长脉冲激光作用下铝合金板材温度和热应力分析

Temperature and Thermal Stress Analysis of Aluminium Alloy Plate Irradiated by Long Pulsed Laser

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摘要

基于冯·米塞斯屈服准则和弹塑性本构关系,建立了长脉冲激光辐照7A04铝合金的空间轴对称有限元模型,并利用有限元有限差分混合算法计算了光强为高斯分布的激光光束加热铝合金板时的温度场和热应力场。研究发现目标上表面米塞斯应力主要分布在中心点周围,离中心点相对较远位置处的米塞斯应力很小,对目标几乎不起破坏作用,并且米塞斯等效应力远小于铝合金目标的屈服强度。仿真计算结果与实验结果的一致性证实了该模型的有效性。

Abstract

Based on the von Mises yield criterion and the elastoplastic constitutive relation, a spatial axisymmetric finite element model is established for long pulsed laser irradiating 7A04 aluminium alloys, and the temperature field and the thermal stress field are calculated by the finite-element/finite-difference hybrid algorithm when the laser beam with a Gaussian intensity profile heating the aluminium alloy plate. It is found that the Mises stress on the target surface distributes mainly within a certain scope around the center. At a position far from the center, the Mises stress is very small which barely affects the target and the Mises equivalent stress is far less than the yield strength of the aluminum alloy target. The consistency between the simulation and experimental results confirms the validity of the model.

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中图分类号:O437

DOI:10.3788/cjl201643.0802006

所属栏目:激光制造

收稿日期:2015-12-18

修改稿日期:2016-04-12

网络出版日期:--

作者单位    点击查看

王翼彬:长春理工大学理学院, 吉林 长春 130022
金光勇:长春理工大学理学院, 吉林 长春 130022
张巍:长春理工大学理学院, 吉林 长春 130022

联系人作者:王翼彬(1226203534@qq.com)

备注:王翼彬(1989—),男,硕士研究生,主要从事激光与物质相互作用方面的研究。

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引用该论文

Wang Yibin,Jin Guangyong,Zhang Wei. Temperature and Thermal Stress Analysis of Aluminium Alloy Plate Irradiated by Long Pulsed Laser[J]. Chinese Journal of Lasers, 2016, 43(8): 0802006

王翼彬,金光勇,张巍. 长脉冲激光作用下铝合金板材温度和热应力分析[J]. 中国激光, 2016, 43(8): 0802006

被引情况

【1】张鹏飞,乔春红,冯晓星,李 南,黄 童,范承玉,王英俭. 序列长脉冲激光热晕效应的定标规律. 光学学报, 2017, 37(10): 1001001--1

【2】任晓东,雷武虎,曾凌清,王勇. 激光斜入射窄带滤光片的热力效应. 光子学报, 2018, 47(11): 1114001--1

【3】任晓东,雷武虎,曾凌清,王勇. 基于相对运动的脉冲激光辐照探测器热效应数值分析. 光子学报, 2019, 48(1): 114001--1

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