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Plastic Deformation of Metal Tubes Subjected to Lateral Blast Loads

机译：横向爆破载荷作用下金属管的塑性变形

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摘要

When subjected to the dynamic load, the behavior of the structures is complex and makes it difficult to describe the process of the deformation. In the paper, an analytical model is presented to analyze the plastic deformation of the steel circular tubes. The aim of the research is to calculate the deflection and the deformation angle of the tubes. A series of assumptions are made to achieve the objective. During the research, we build a mathematical model for simply supported thin-walled metal tubes with finite length. At a specified distance above the tube, a TNT charge explodes and generates a plastic shock wave. The wave can be seen as uniformly distributed over the upper semicircle of the cross-section. The simplified Tresca yield domain can be used to describe the plastic flow of the circular tube. The yield domain together with the plastic flow law and other assumptions can finally lead to the solving of the deflection. In the end, tubes with different dimensions subjected to blast wave induced by the TNT charge are observed in experiments. Comparison shows that the numerical results agree well with experiment observations.
机译：当承受动态载荷时，结构的行为很复杂，难以描述变形过程。本文提出了一种分析模型来分析圆形钢管的塑性变形。研究的目的是计算管的挠度和变形角。为实现该目标进行了一系列假设。在研究过程中，我们为有限长度的简单支撑薄壁金属管建立了数学模型。在管子上方的指定距离处，TNT电荷爆炸并产生塑性冲击波。可以将波视为均匀分布在横截面的上半圆上。简化的Tresca屈服域可用于描述圆形管的塑性流动。屈服域连同塑性流动定律和其他假设最终可以导致挠度的求解。最后，在实验中观察到不同尺寸的管子受到TNT电荷诱发的爆炸波。比较表明，数值结果与实验结果吻合良好。

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  • 来源
    《Mathematical Problems in Engineering》 |2014年第21期|250379.1-250379.10|共10页
  • 作者

    Song Kejian; Long Yuan; Ji Chong; Gao Fuyin;

  • 作者单位

    PLA Univ Sci & Technol, Coll Field Engn, Nanjing 210007, Jiangsu, Peoples R China.;

    PLA Univ Sci & Technol, Coll Field Engn, Nanjing 210007, Jiangsu, Peoples R China.;

    Beijing Inst Technol, Natl Key Lab Explos Sci & Technol, Beijing 10081, Peoples R China.;

    PLA Univ Sci & Technol, Coll Field Engn, Nanjing 210007, Jiangsu, Peoples R China.;

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