NDLI: Rate-Dependent Cohesive Models for Dynamic Mode I Interfacial Propagation and Failure of Unidirectional Composite Laminates

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Rate-Dependent Cohesive Models for Dynamic Mode I Interfacial Propagation and Failure of Unidirectional Composite Laminates

Content Provider	MDPI
Author	Zhang, Chenxu Liu, Huifang Cao, Junchao Zhang, Chao
Copyright Year	2021
Description	With the increasing application of composite materials in anti-impact structure, the development of reliable rate-dependent interlaminar constitutive model becomes necessary. This study aims to assess and evaluate the applicability of three types of rate-dependent cohesive models (logarithmic, exponential and power) in numerical delamination simulation, through comparison with dynamic test results of double cantilever beam (DCB) specimens made from T700/MTM28-1 composite laminate. Crack propagation length history profiles are extracted to calibrate the numerical models. Crack propagation contours and fracture toughness data are predicted, extracted and compared to investigate the difference of the three different rate-dependent cohesive models. The variation of cohesive zone length and force profiles with the implemented models is also investigated. The results suggest that the crack propagation length can be better predicted by logarithmic and power models. Although crack propagation length profiles are well predicted, the numerical calculated dynamic fracture toughness tends to be higher than that of experimental measured results. The three models also show differences in the prediction of maximum loading forces. The results of this work provide useful guidance for the development of more efficient cohesive models and more reliable interface failure simulation of impact problems.
Starting Page	191
e-ISSN	20796412
DOI	10.3390/coatings11020191
Journal	Coatings
Issue Number	2
Volume Number	11
Language	English
Publisher	MDPI
Publisher Date	2021-02-07
Access Restriction	Open
Subject Keyword	Coatings Mechanical Engineering Composite Laminates Cohesive Zone Modeling Rate Dependency Finite Element Analysis (fea) Delamination Crack Propagation
Content Type	Text
Resource Type	Article

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