| 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
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| Source Publication | DYMAT 2009: 9TH INTERNATIONAL CONFERENCE ON THE MECHANICAL AND PHYSICAL BEHAVIOUR OF MATERIALS UNDER DYNAMIC LOADING, VOL 2 |
| 2009 | |
| Pages | 941-946 |
| Conference Name | 9th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading |
| Conference Date | SEP 07-11, 2009 |
| Conference Place | Brussels, BELGIUM |
| Abstract | 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. |
| Keyword | Failure Model Compression Evolution Behavior |
| ISBN | 978-2-7598-0473-3 |
| URL | 查看原文 |
| Language | 英语 |
| Document Type | 会议论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/44344 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Wang HY |
| Recommended Citation 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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