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Effect of High Voltage Pulse Current on Crack Arrest
Authors
吴杰
李晓惠
白象忠
Publication date
1 January 2006
Publisher
Abstract
如何产生高强度脉冲电流是应用电磁热效应遏制金属裂纹扩展的一个关键问题。介绍了高压脉冲放电装置的工作原理,从理论、数值模拟、实验三个方面,通过对不同尺寸的裂纹试件导入强脉冲电流而产生的电磁热效应的止裂效果进行了分析和研究,研究结果表明:强脉冲电流产生的电磁热效应,能够使裂纹尖端处熔化形成微小的焊口,遏制了裂纹的扩展。试件的通流尺寸、电阻率、导入电流密度是影响裂纹尖端温度场和温度梯度场的主要因素
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Institute Of Mechanics,Chinese Academy of Sciences
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Last time updated on 12/02/2018