<p>Aiming at the key issues of the SiC/UHMWPE composite ballistic plates, such as the unclear cross-scale damage coupling mechanism under impact loading and the inaccurate prediction of inter-block cracks, this study conducted systematic numerical simulation and experimental research. By establishing a finite element model based on Peridynamics, and combining multi-scale characterization methods including 3D Digital Image Correlation, X-ray Digital Radiography, and Scanning Electron Microscopy/Energy Dispersive Spectroscopy, this study explored the material’s damage evolution process in depth. This study summarized the three-stage law of damage propagation between ceramic blocks, in which the concentration of tensile waves induces transverse cracks. This study clarified the ceramic cross-scale damage mechanism and revealed the essence of ceramic crack formation: inherent pores trigger microcracks, and the propagation of microcracks leads to mixed fracture. These achievements provide solid theoretical support and data support for the optimal design of composite ballistic plates, and help promote the development of a new generation of high-performance personal protective systems.</p>

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Multi-Scale Damage Analysis of SiC/UHWMPE Composite Ballistic Plates Under Penetrating Impacts

  • Y. Du,
  • Y. Wen,
  • H. Wang,
  • Z. Shen,
  • W. Nie,
  • X. Wang,
  • B. Qin

摘要

Aiming at the key issues of the SiC/UHMWPE composite ballistic plates, such as the unclear cross-scale damage coupling mechanism under impact loading and the inaccurate prediction of inter-block cracks, this study conducted systematic numerical simulation and experimental research. By establishing a finite element model based on Peridynamics, and combining multi-scale characterization methods including 3D Digital Image Correlation, X-ray Digital Radiography, and Scanning Electron Microscopy/Energy Dispersive Spectroscopy, this study explored the material’s damage evolution process in depth. This study summarized the three-stage law of damage propagation between ceramic blocks, in which the concentration of tensile waves induces transverse cracks. This study clarified the ceramic cross-scale damage mechanism and revealed the essence of ceramic crack formation: inherent pores trigger microcracks, and the propagation of microcracks leads to mixed fracture. These achievements provide solid theoretical support and data support for the optimal design of composite ballistic plates, and help promote the development of a new generation of high-performance personal protective systems.