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电阻加热金属丝材塑性变形电-热-机械响应分析

苑城玮, 陈树君, 蒋凡, 杨福前

苑城玮, 陈树君, 蒋凡, 杨福前. 电阻加热金属丝材塑性变形电-热-机械响应分析[J]. 焊接学报, 2020, 41(12): 1-6. DOI: 10.12073/j.hjxb.20200921001
引用本文: 苑城玮, 陈树君, 蒋凡, 杨福前. 电阻加热金属丝材塑性变形电-热-机械响应分析[J]. 焊接学报, 2020, 41(12): 1-6. DOI: 10.12073/j.hjxb.20200921001
YUAN Chengwei, CHEN Shujun, JIANG Fan, YANG Fuqian. Electro-thermal-mechanical response analysis of plastic deformation of resistance heating metal wire[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(12): 1-6. DOI: 10.12073/j.hjxb.20200921001
Citation: YUAN Chengwei, CHEN Shujun, JIANG Fan, YANG Fuqian. Electro-thermal-mechanical response analysis of plastic deformation of resistance heating metal wire[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(12): 1-6. DOI: 10.12073/j.hjxb.20200921001

电阻加热金属丝材塑性变形电-热-机械响应分析

基金项目: 国家自然科学基金资助项目(51875004);北京市自然科学基金资助项目(3172004).
详细信息
    作者简介:

    苑城玮,1992年出生,博士,讲师;主要从事金属增材制造技术和机器人工程方向的科研和教学工作;Email:bj_ycw@126.com.

    通讯作者:

    陈树君,博士,教授,博士研究生导师;Email:sjchen@bjut.edu.cn.

  • 中图分类号: TG 142

Electro-thermal-mechanical response analysis of plastic deformation of resistance heating metal wire

  • 摘要: 电阻加热金属丝材增材制造技术对空间设备的修复和制造具有重要意义,在电阻加热金属丝材熔化沉积成形过程中,金属熔体的塑性变形影响金属零件的成形形貌. 为了精确探究金属熔体的塑性变形,将不同的电流密度通过短路的金属丝材,通过高速摄像机观测金属丝材塑性变化,采用热像仪和电压电流采集系统分别采集了金属丝材熔化过程的温度变化和电信号变化. 数值分析金属丝材塑性变形的机电热响应状态. 结果表明,数值计算得出最大挠度是电流密度的线性函数,与试验结果一致,通过高密度电流的金属丝材会发生显着的塑性变形. 在高电流密度的电流的作用下,释放出大量的焦耳热会引起局部温度的显着升高,从而导致屈服应力的降低,由于电-热-机械相互作用的原因,容易在电子互连中引起塑性变形.
    Abstract: Resistance heating metal wire additive manufacturing technology is of great significance to the repair and manufacturing of space equipment. During the melting and deposition forming process of resistance heating metal wire, the plastic deformation of the metal melt affects the forming morphology of metal parts. In order to accurately explore the plastic deformation of the metal melt, the plastic change of the metal wire was observed through a high-speed camera when passing different current densities through the short-circuited metal wire. The changes of temperature and electricity signal were collected by using a thermal imager and a voltage and current acquisition system during the melting process. The electromechanical and thermal response states of metal wire plastic deformation were analyzed numerically. The results showed that the maximum deflection obtained by numerical calculation was a linear function of current density, which was consistent with the experimental results. Metal wire passing through high-density current of metal wire occurred significant plastic deformation. Under the action of a high current density current, releasing a large amount of Joule heat caused a significant increase in local temperature and a decrease in yield stress. Due to the electro-thermal-mechanical interaction, it was easy to cause plastic deformation in electronic interconnection.
  • 图  1   电阻加热金属丝材试验系统

    Figure  1.   Experimental system of resistance heating wire

    图  2   电阻加热金属丝材温度分布

    Figure  2.   Temperature distribution of resistance heating wire

    图  3   电阻加热金属丝材熔化过程随时间变化的挠度

    Figure  3.   Time-dependent deflection of resistance heated wire during melting. (a) w = 0.8 mm; (b) w = 1.2 mm; (c) w = 1.6 mm

    图  4   电阻加热金属丝材最大挠度随时间变化趋势

    Figure  4.   Variation trend of maximum deflection of resistance heating wire with time

    图  5   金属丝材在准稳态周期中的最大挠度随电流密度变化

    Figure  5.   Maximum deflection of a metal wire in a quasi-steady-state period varies with current density

    表  1   电阻加热金属丝材试验方案

    Table  1   Experimental scheme of resistance heating wire

    试验方案电流值I/A电流波形电极距离d/mm丝材直径w/mm
    1-1 60 恒流电流 6.0 1.2
    1-2 80 恒流电流 6.0 1.2
    1-3 100 恒流电流 6.0 1.2
    1-4 120 恒流电流 6.0 1.2
    2-1 80 恒流电流 6.0 0.8
    2-2 80 恒流电流 6.0 1.2
    2-3 80 恒流电流 6.0 1.6
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出版历程
  • 收稿日期:  2020-09-20
  • 网络出版日期:  2021-01-08
  • 刊出日期:  2021-02-01

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