Fracture mechanism of steel plate loaded by explosive-induced shock waves
作者： Jianqiao Li , Xiangzhao Xu , Yan Duan , Huilan Ren
DOI: 10.1016/J.ENGFAILANAL.2019.03.025
关键词:
摘要: Abstract The fracture mechanism of in-plane notched steel plate were experimentally investigated under the loading triangle shock waves. A series 20 mm thick plates loaded by explosive charges with different weights and in load surface free surface. explosives cut central part along notches recovered specimens processed analyzed scanning electron microscope (SEM). It was found that notch properties had a significant effect on spall observed experiments. Thick charge generated deeper, smaller more dimples which means ductile increased crack extension resistibility strengthened. This led to step-like morphology Moreover, fractures two sides different. shear emerged side tensile appeared side. However, when there no surface, extended At same time, interrelated near notch. Based experimental results, new damage level function proposed considering statistic length instead void volume. theoretical analyses spalls all six loadings performed compared results. comparison showed good agreement reliability model verified. behavior obtained from experiments provided foundation for further investigations improved applicable engineering analysis.
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