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Progressive fragment modeling of failure wave in ceramics under planar impact loading

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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 was 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.

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Authors and Affiliations

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

    Yao Guo-wen  (姚国文) (Associate Professor, Doctor)

  2. Department of Engineering Mechanics, Chongqing University, Chongqing, 400044, P. R. China

    Liu Zhan-fang  (刘占芳)

  3. College of Traffic and Communications, South China University of Technology, Guangzhou, 510640, P. R. China

    Huang Pei-yan  (黄培彦)

Authors
  1. Yao Guo-wen  (姚国文)
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  2. Liu Zhan-fang  (刘占芳)
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  3. Huang Pei-yan  (黄培彦)
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Corresponding author

Correspondence to Yao Guo-wen  (姚国文).

Additional information

Project supported by the National Natural Science Foundation of China (Nos. 10376046, 10272047) and the Defense Science Technology Key Lab Foundation of China (Nos. 99JS75, 22JN2001)

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Yao, Gw., Liu, Zf. & Huang, Py. Progressive fragment modeling of failure wave in ceramics under planar impact loading. Appl Math Mech 27, 215–220 (2006). https://doi.org/10.1007/s10483-006-0209-z

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  • DOI: https://doi.org/10.1007/s10483-006-0209-z

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