Catastrophic rupture of heterogeneous brittle materials under impact loading

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	Catastrophic rupture of heterogeneous brittle materials under impact loading
	Wang HY(汪海英); Shu J; Bai YL(白以龙); Xia MF(夏蒙棼); Ke FJ(柯孚久); Wang HY
会议录名称	DYMAT 2009: 9TH INTERNATIONAL CONFERENCE ON THE MECHANICAL AND PHYSICAL BEHAVIOUR OF MATERIALS UNDER DYNAMIC LOADING, VOL 2
	2009
页码	941-946
会议名称	9th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading
会议日期	SEP 07-11, 2009
会议地点	Brussels, BELGIUM
摘要	The catastrophic failure of heterogeneous brittle materials under impact loading is not fully understood. To describe the catastrophic failure behavior of heterogeneous brittle materials under impact loading, an elasto-statistical-brittle (ESB) model is proposed in this paper. The ESB model characterizes the disordered inhomogeneity of material at mesoscopic scale with the statistical description of the shear strength of mesoscopic units. If the applied shear stress reaches the strength, the mesoscopic unit fails, which causes degradation in the shear modulus of the material. With a simplified ESB model, the failure wave in brittle material under uni-axial compression is analyzed. It is shown that the failure wave is a wave of strain or particle velocity resulted from the catastrophic fracture in an elastically stressed brittle media when the impact velocity reaches a critical value. In addition, the failure wave causes an increase in the rear surface velocity, which agrees well with experimental observations. The critical condition to generate failure wave and the speed of failure wave are also obtained.
关键词	Failure Model Compression Evolution Behavior
ISBN号	978-2-7598-0473-3
URL	查看原文
语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/44344
专题	非线性力学国家重点实验室
通讯作者	Wang HY
推荐引用方式 GB/T 7714	Wang HY,Shu J,Bai YL,et al. Catastrophic rupture of heterogeneous brittle materials under impact loading[C]DYMAT 2009: 9TH INTERNATIONAL CONFERENCE ON THE MECHANICAL AND PHYSICAL BEHAVIOUR OF MATERIALS UNDER DYNAMIC LOADING, VOL 2,2009:941-946.

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