Progressive Fragment Modeling of the Failure Wave in Ceramics Under Planar Impact Loading

YAO Guo-wen; LIU Zhan-fang; HUANG Pei-yan

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YAO Guo-wen, LIU Zhan-fang, HUANG Pei-yan. Progressive Fragment Modeling of the Failure Wave in Ceramics Under Planar Impact Loading[J]. Applied Mathematics and Mechanics, 2006, 27(2): 193-198.

Citation:

YAO Guo-wen, LIU Zhan-fang, HUANG Pei-yan. Progressive Fragment Modeling of the Failure Wave in Ceramics Under Planar Impact Loading[J]. Applied Mathematics and Mechanics, 2006, 27(2): 193-198.

Citation:

YAO Guo-wen, LIU Zhan-fang, HUANG Pei-yan. Progressive Fragment Modeling of the Failure Wave in Ceramics Under Planar Impact Loading[J]. Applied Mathematics and Mechanics, 2006, 27(2): 193-198.

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Progressive Fragment Modeling of the Failure Wave in Ceramics Under Planar Impact Loading

1.
School of Civil Engineering and Architecture, Chongqing Jiaotong University, Chongqing 400074, P. R. China;

Received Date: 2004-05-18
Rev Recd Date: 2005-10-31
Publish Date: 2006-02-15

Abstract

Abstract

Polycrystalline ceramics have heterogeneous meso-structures which result in high singularity in stress distribution. Based on this, a progressive fragment model was proposed which describes the failure wave formation and propagation in shocked ceramics. The governing equation of the failure wave is characterized by inelastic bulk strain with material damage and fracture. And the inelastic bulk strain consists of dilatant strain from nucleation and expansion of microcracks and condensed strain from collapse of original pores. Numerical simulation of the free surface velocity was performed in good agreement with planar impact experiments on 92.93% aluminas at China Academy of Engineering Physics. And the longitudinal, lateral and shear stress histories upon the arrival of the failure wave were predicted, which present the diminished shear strength and lost spall strength in the failed layer.
- failure wave,
- progressive fragment model,
- alumina ceramics,
- heterogeneous meso-structure,
- plate impact experiment

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References(14)

References

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