Tensile damage evolution of unidirectional ceramic matrix composites under thermal stress

Jintao Li, Jun Liu, Bo Wang, Yifan Yue, Chengyu Zhang, Tao Suo

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Ceramic matrix composites (CMCs) have been widely used in aerospace thermal-structures due to their excellent high-temperature performance. It is essential to understand the damage evolution of CMCs. However, in previous research work, the effect of thermal stress induced damage during CMCs fabrication on tensile response was often ignored. A damage evolution model that considers axial and radial thermal stresses to predict tensile response of unidirectional ceramic matrix composites was proposed in this study. The average relative errors between the current prediction and experimental data in the literature were calculated as 1.64 % and 1.91 %, validating this approach. Meantime, the damage evolution laws of interface debonding and the critical stress of matrix cracking in the Budiansky–Hutchinson–Evans (BHE) model were corrected to satisfy the discontinuous interfacial shear stress. According to the experimental data, the current model predicted critical stresses of matrix cracking better than the BHE model, with error rate reductions of 6.52 % and 15.38 %.

Original languageEnglish
Pages (from-to)43500-43512
Number of pages13
JournalCeramics International
Volume50
Issue number21
DOIs
StatePublished - 1 Nov 2024

Keywords

  • Damage evolution
  • Thermal stress
  • Unidirectional ceramic matrix composites

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