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Failure characterization of solid structures based on an equivalence of cohesive zone model
Long H(龙浩); Liang LH(梁立红); Wei YG(魏悦广)
Source PublicationINTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
2019-05
Volume163Pages:194-210
ISSN0020-7683
AbstractCohesive zone models have been widely used to model interface crack initiation and propagation both in single-material media and bi-material systems. For single-material media with cohesive elements inserted into interface among segments, in order to ensure that the introduction of interface cohesive zone models does not affect the mechanical properties of single-material media before the softening stage of cohesive zone models, a selection criterion of stiffness of cohesive elements is proposed theoretically firstly based on the properties' equivalence. Taking the softening stage into account, the mechanical responses of the overall stress-strain relationship of single-material media, for the cases of stable increase of strain and snap-back instability of strain, are both obtained, and the related energy mechanism are investigated. For bi-material systems with cohesive elements at interface between two materials, the thickness-dependent failure characteristics of systems in uniaxial tension are found, which is attributed to the difference of the releasing rate of elastic strain energy in the materials with different thicknesses. Furthermore, as a more complex application of cohesive elements, based on the selection criterion proposed, failure behaviors of the ceramic coating/substrate systems under three-point bending are modeled by finite element method and inserting cohesive elements into the coating segments and the coating/substrate interface simultaneously. The simulation results indicate the transition of dominated failure mode from coating cracking to interface delamination with increasing coating thickness, and show faster damage of thick coating systems, agreeing with experimental results. The effects of interface strength and toughness of cohesive elements on failure are also revealed. These results can provide guidance for the application of cohesive elements, and help us better understand the overall failure behaviors of interface systems. (C) 2019 Elsevier Ltd. All rights reserved.
KeywordInterface cohesive elements Stiffness Failure Thickness effect
DOI10.1016/j.ijsolstr.2019.01.008
Indexed BySCI ; EI
Language英语
WOS IDWOS:000461535100015
WOS KeywordTHERMAL BARRIER COATINGS ; VISCOUS REGULARIZATION ; NUMERICAL-SIMULATION ; INTERFACIAL DELAMINATION ; FRACTURE CHARACTERISTICS ; CRACK-PROPAGATION ; ELEMENT APPROACH ; GROWN OXIDE ; DAMAGE ; LAW
WOS Research AreaMechanics
WOS SubjectMechanics
Funding OrganizationNational Natural Science Foundation of ChinaNational Natural Science Foundation of China [11672296, 91860102, 11372318, 11432014, 11672301, 11890681, 11521202] ; Strategic Priority Research Program of the Chinese Academy of SciencesChinese Academy of Sciences [XDB22040501]
Classification一类/力学重要期刊
Ranking1
ContributorLiang, LH
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81447
Collection非线性力学国家重点实验室
Recommended Citation
GB/T 7714
Long H,Liang LH,Wei YG. Failure characterization of solid structures based on an equivalence of cohesive zone model[J]. INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,2019,163:194-210.
APA 龙浩,梁立红,&魏悦广.(2019).Failure characterization of solid structures based on an equivalence of cohesive zone model.INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,163,194-210.
MLA 龙浩,et al."Failure characterization of solid structures based on an equivalence of cohesive zone model".INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES 163(2019):194-210.
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