Numerical simulation of EBPVD thermal barrier coatings spallation

被引：40

作者：

Caliez, M

Chaboche, JL

Feyel, F

Kruch, S

机构：

[1] LMR Tours, Ecole Ingn Val Loire, Lab Mecan & Rheol, F-41034 Blois, France

[2] Off Natl Etud & Rech Aerosp, F-92322 Chatillon, France

来源：

ACTA MATERIALIA | 2003年 / 51卷 / 04期

关键词：

thermal barrier coating; interface toughness; damage mechanics; cohesive zone model; spallation;

D O I：

10.1016/S1359-6454(02)00518-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An elastoviscoplastic finite element model is proposed to assess the bond-coat/oxide interface critical energy release rate in an EBPVD thermal barrier coating (TBC). The local stress fields responsible for the crack initiations are analyzed at the interfacial roughness scale. The TBC bond strength is identified from experimental results of spallation tests. The local spallation of the topcoat is modeled by the insertion of cohesive zone models, based on the continuum damage mechanics framework. The bond-coat/oxide interface strength evolution shows a continuous decline as a function of the oxidation time. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

引用

页码：1133 / 1141

页数：9

共 21 条

[1] A mechanistic study of oxidation-induced degradation in a plasma-sprayed thermal barrier coating system. Part I: Model formulation [J].