A numerical method for the thermal-shock crack problems of nonhomogeneous materials with inclusions based on an interaction energy integral method

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	A numerical method for the thermal-shock crack problems of nonhomogeneous materials with inclusions based on an interaction energy integral method
	Zhang, YY; Guo, LC; Huang, K; Bai, XM; Pang, JC; Zhang, ZF; Guo, LC (reprint author), Harbin Inst Technol, Dept Astronaut Sci & Mech, Harbin 150001, Heilongjiang, Peoples R China.
刊名	ENGINEERING FRACTURE MECHANICS
	2018-03-01
卷号	190 页码:159-174
关键词	Functionally Graded Materials Stress Intensity Factors Hyperbolic Heat-conduction Finite-element Method Fracture-analysis Divertor Plate Behavior Interfaces Resistance Strip
ISSN号	0013-7944
英文摘要	Nonhomogeneous materials, especially for particulate composites, usually contain defects such as voids and debonding introduced during manufacturing process. Due to existence of defects, nonhomogeneous materials are prone to fracture failure under thermal shock loading. This paper aims to develop a set of methods for analysing the thermal-shock crack problems of nonhomogeneous material plates (NMPs) with inclusions. A modified domain-independent interaction energy integral method (IEIM) is developed to obtain the mixed-mode transient thermal stress intensity factors (TSIFs). Then the IEIM, the extended finite element method (XFEM) and the finite difference method (FDM) are combined together to address a thermal-shock crack problem of a NMP with an inclusion. With the methods, the influences of the inclusion on the transient mixed-mode TSIFs are investigated. The results show that the present method can be applied to solve the thermal shock crack problem effectively. Furthermore, the relations between the mixed-mode TSIFs and model parameters including material constants as well as locations of the inclusion are established. It is found that the thermal expansion coefficient and Young's modulus of the inclusion affect the mixed-mode TSIFs in a dominant manner in comparison with other factors such as the specific heat, heat conductivity and density of the inclusion affect the TSIFs slightly. Specifically, the critical normalized distance, beyond which the influence of the inclusion on the mixed-mode TSIFs is negligible, is revealed. The present work will be significant for fracture mechanics analysis and design of nonhomogeneous materials with inclusions. (C) 2017 Elsevier Ltd. All rights reserved.; Nonhomogeneous materials, especially for particulate composites, usually contain defects such as voids and debonding introduced during manufacturing process. Due to existence of defects, nonhomogeneous materials are prone to fracture failure under thermal shock loading. This paper aims to develop a set of methods for analysing the thermal-shock crack problems of nonhomogeneous material plates (NMPs) with inclusions. A modified domain-independent interaction energy integral method (IEIM) is developed to obtain the mixed-mode transient thermal stress intensity factors (TSIFs). Then the IEIM, the extended finite element method (XFEM) and the finite difference method (FDM) are combined together to address a thermal-shock crack problem of a NMP with an inclusion. With the methods, the influences of the inclusion on the transient mixed-mode TSIFs are investigated. The results show that the present method can be applied to solve the thermal shock crack problem effectively. Furthermore, the relations between the mixed-mode TSIFs and model parameters including material constants as well as locations of the inclusion are established. It is found that the thermal expansion coefficient and Young's modulus of the inclusion affect the mixed-mode TSIFs in a dominant manner in comparison with other factors such as the specific heat, heat conductivity and density of the inclusion affect the TSIFs slightly. Specifically, the critical normalized distance, beyond which the influence of the inclusion on the mixed-mode TSIFs is negligible, is revealed. The present work will be significant for fracture mechanics analysis and design of nonhomogeneous materials with inclusions. (C) 2017 Elsevier Ltd. All rights reserved.
学科主题	Mechanics
语种	英语
资助机构	NSFC [11322217, 11432005]; General Project for Department of Liaoning Education [L2015364]; Natural Science Foundation of Liaoning [20170520346]
公开日期	2018-06-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79468]
专题	金属研究所_中国科学院金属研究所
通讯作者	Guo, LC (reprint author), Harbin Inst Technol, Dept Astronaut Sci & Mech, Harbin 150001, Heilongjiang, Peoples R China.
推荐引用方式 GB/T 7714	Zhang, YY,Guo, LC,Huang, K,et al. A numerical method for the thermal-shock crack problems of nonhomogeneous materials with inclusions based on an interaction energy integral method[J]. ENGINEERING FRACTURE MECHANICS,2018,190:159-174.
APA	Zhang, YY.,Guo, LC.,Huang, K.,Bai, XM.,Pang, JC.,...&Guo, LC .(2018).A numerical method for the thermal-shock crack problems of nonhomogeneous materials with inclusions based on an interaction energy integral method.ENGINEERING FRACTURE MECHANICS,190,159-174.
MLA	Zhang, YY,et al."A numerical method for the thermal-shock crack problems of nonhomogeneous materials with inclusions based on an interaction energy integral method".ENGINEERING FRACTURE MECHANICS 190(2018):159-174.