壁厚对HR2钢柱壳爆轰加载下膨胀断裂行为的影响

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	壁厚对HR2钢柱壳爆轰加载下膨胀断裂行为的影响
其他题名	Effect of Shell Thickness on Expanding Fracture Behavior of HR2 Steel Cylinders under Explosive Loading
	卢秋虹 1; 王宁 2; 范诚 3; 申勇峰 2; 刘明涛 3; 汤铁钢 3; 胡海波 3
	2020
发表期刊	材料研究学报
ISSN	1005-3093
卷号	34.0 期号:004 页码:241-246
摘要	通过对6、12 mm两种不同壁厚的HR2钢柱壳进行爆轰加载实验,对其断裂碎片的宏观形貌、断口的微观形貌以及横截面的变形微观结构进行系统表征,研究了金属柱壳在爆轰加载下的膨胀断裂机理。结果表明,在膨胀断裂过程中壳壁厚度的增大导致HR2钢柱壳由纯剪切断裂变为拉剪混合的断裂模式。断裂碎片的微观结构分析结果表明,柱壳的断裂实际上是剪切裂纹从样品内部剪切带形核并扩展、和拉伸裂纹沿柱壳外表面的形核扩展的共同作用及竞争的结果。薄壁柱壳断裂由样品内裂纹沿剪切带的形核和扩展主导发生剪切断裂,而厚壁柱壳中内侧的裂纹沿剪切带的形核和扩展,但是最外侧则为环向拉应力主导发生拉伸断裂,因此表现出拉剪结合的断裂模式。
其他摘要	To clarify the fracture mechanism of metal cylinder under explosive loading, HR2 steel cylinders with shell of 6 and 12 mm in thickness respectively were subjected to explosive loading. The fracture fragments were collected after explosion, and then systematically investigated in terms of macroscopic morphology, fracture morphology and deformation microstructure. It is found that when the shell thickness increases, the fracture mode of HR2 cylinder changed from shearing fracture to the mixture of shearing fracture and tensile fracture. The deformation microstructure observation indicates that the failure and fracture of cylinder shell are the result of the combination and competition of cracks-nucleating and-expanding from the shear band and from the outer surface. The fracture of thin cylinder is dominant by the cracks nucleating and expanding from the shear band, presenting shearing fracture mode. The fracture of thick cylinder is the combined action of cracks-nucleating and-expanding from the shear band and from the outer surface, presenting a mode of mixture of shear-and tensile-fracture.
关键词	金属材料 HR2钢爆轰加载膨胀断裂微观结构剪切带断裂机理
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:6686034
引用统计	被引频次：4[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/144987
专题	中国科学院金属研究所
作者单位	1.中国科学院金属研究所 2.东北大学 3.中国工程物理研究院
推荐引用方式 GB/T 7714	卢秋虹,王宁,范诚,等. 壁厚对HR2钢柱壳爆轰加载下膨胀断裂行为的影响[J]. 材料研究学报,2020,34.0(004):241-246.
APA	卢秋虹.,王宁.,范诚.,申勇峰.,刘明涛.,...&胡海波.(2020).壁厚对HR2钢柱壳爆轰加载下膨胀断裂行为的影响.材料研究学报,34.0(004),241-246.
MLA	卢秋虹,et al."壁厚对HR2钢柱壳爆轰加载下膨胀断裂行为的影响".材料研究学报 34.0.004(2020):241-246.