Prediction of thermal shock induced cracking in multi-material ceramics using a stress-energy criterion

被引：1

作者：

Paps, Roman ^{[1
]}

Sevecek, Oldrich ^{[2
]}

Schlacher, Josef ^{[1
]}

Bermejo, Raill ^{[1
]}

机构：

[1] Univ Leoben, Dept Mat Sci, Franz Josef Str 18, A-8700 Leoben, Austria

[2] Brno Univ Technol, Inst Solid Mech Mechatron & Biomech, Fac Mech Engn, Tech 2, Brno 61669, Czech Republic

来源：

ENGINEERING FRACTURE MECHANICS | 2024年 / 303卷

基金：

欧洲研究理事会;

关键词：

Thermal shock; Ceramics; Alumina; Multi-material; Coupled criterion; Finite fracture mechanics; HEAT-TRANSFER COEFFICIENT; COUPLED STRESS; NUMERICAL SIMULATIONS; TENSION; APPLICATION; FRACTURE-BEHAVIOR; RESIDUAL-STRESSES; MULTI-CRACKING; STRENGTH; PROPAGATION; ONSET;

D O I：

10.1016/j.engfracmech.2024.110121

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Impact of residual stresses on the thermal shock resistance of alumina-zirconia multi-layer ceramics is investigated within the framework of finite fracture mechanics, using a stress-energy criterion. The critical temperature difference (Delta T-c) for crack formation is strongly dependent on the magnitude of residual stress and the material's strength. The predicted minimal spacing between cracks, critical time for crack initiation, and initial depth of the induced cracks are compared and discussed for different designs. An increase of up to similar to 40 % in Delta T-c is predicted for multi-material ceramics with a thin alumina surface layer with compressive stresses, compared to bulk reference alumina.

引用

页数：11

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