Numerical Simulation of Surface Crack Propagation in Thermal Barrier Coatings Under Thermal Mismatch Stress

被引：0

作者：

Yu Qingmin ^{[1
]}

Shi Yongzhi ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Xian 710072, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2018年 / 47卷 / 10期

关键词：

thermal barrier coating; thermal mismatch stress; surface crack; extended finite element method; INTERFACIAL DELAMINATION; FAILURE MECHANISMS; PERIODIC CRACKING; GROWN OXIDE; SYSTEM; MORPHOLOGY; PROGRESS;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of thermal mismatch stress on the surface crack propagation in thermal barrier coatings was investigated by extended finite element method (XFEM). The results show that the location, slope angle and length of the crack have a significant effect on the crack propagation length, energy release rate and stress level of crack tip under the thermal mismatch stress. Among the cracks with the same initial length, the one at the valley has the longest extension length and the highest energy release rate. The larger the slope angle, the shorter the length of crack expansion but the larger the strain energy. The larger the initial crack length, the longer the crack propagation length and the faster the expansion rate, and the greater the energy release rate. The crack propagation affects each other under the condition of multiple cracks.

引用

页码：3052 / 3057

页数：6

共 22 条

[11]

Qi Shasha, 2015, DIMENSIONAL ANAL FIN

[12] Failure mechanisms associated with the thermally grown oxide in plasma-sprayed thermal barrier coatings [J].

Rabiei, A ;

Evans, AG .

ACTA MATERIALIA, 2000, 48 (15) :3963-3976

[13] Impact of the non-homogenous temperature distribution and the coatings process modeling on the thermal barrier coatings system [J].

Ranjbar-Far, M. ;

Absi, J. ;

Shahidi, S. ;

Mariaux, G. .

MATERIALS & DESIGN, 2011, 32 (02) :728-735

[14] Simulation of the effect of material properties and interface roughness on the stress distribution in thermal barrier coatings using finite element method [J].

Ranjbar-Far, M. ;

Absi, J. ;

Mariaux, G. ;

Dubois, F. .

MATERIALS & DESIGN, 2010, 31 (02) :772-781

[15] Periodic cracking of elastic coatings [J].

Schulze, GW ;

Erdogan, F .

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 1998, 35 (28-29) :3615-3634

[16] Finite element simulation of stress distribution and development in 8YSZ and double-ceramic-layer La2Zr2O7/8YSZ thermal barrier coatings during thermal shock [J].

Wang, L. ;

Wang, Y. ;

Zhang, W. Q. ;

Sun, X. G. ;

He, J. Q. ;

Pan, Z. Y. ;

Wang, C. H. .

APPLIED SURFACE SCIENCE, 2012, 258 (08) :3540-3551

[17] Residual stress distribution along interfaces in thermal barrier coating system under thermal cycles [J].

Yu, Q. M. ;

Cen, L. .

CERAMICS INTERNATIONAL, 2017, 43 (03) :3089-3100

[18] Influences of interface morphology and thermally grown oxide thickness on residual stress distribution in thermal barrier coating system [J].

Yu, Q. M. ;

Zhou, H. L. ;

Wang, L. B. .

CERAMICS INTERNATIONAL, 2016, 42 (07) :8338-8350

[19] The surface cracking behavior in air plasma sprayed thermal barrier coating system incorporating interface roughness effect [J].

Zhang, W. X. ;

Fan, X. L. ;

Wang, T. J. .

APPLIED SURFACE SCIENCE, 2011, 258 (02) :811-817

[20] Effect of pre-existing surface crack morphology on the interfacial thermal fracture of thermal barrier coatings: a numerical study [J].

Zhou, B ;

Kokini, K .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 348 (1-2) :271-279

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