A New Stress-Based Formulation for Modeling Notched Fiber-Reinforced Laminates.

Liu, X; Wang, L; Luo, Q; Bai, Z; Li, Q; Hu, J

A New Stress-Based Formulation for Modeling Notched Fiber-Reinforced Laminates.

Liu, X Wang, L Luo, Q

Bai, Z Li, Q Hu, J

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Publisher:: MDPI
Publication Type:: Journal Article
Citation:: Polymers (Basel), 2022, 14, (24), pp. 5552
Issue Date:: 2022-12-19

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Field	Value	Language
dc.contributor.author	Liu, X
dc.contributor.author	Wang, L
dc.contributor.author	Luo, Q https://orcid.org/0000-0001-5727-9290
dc.contributor.author	Bai, Z
dc.contributor.author	Li, Q
dc.contributor.author	Hu, J
dc.date.accessioned	2023-03-12T22:59:23Z
dc.date.available	2022-12-15
dc.date.available	2023-03-12T22:59:23Z
dc.date.issued	2022-12-19
dc.identifier.citation	Polymers (Basel), 2022, 14, (24), pp. 5552
dc.identifier.issn	2073-4360
dc.identifier.issn	2073-4360
dc.identifier.uri	http://hdl.handle.net/10453/167087
dc.description.abstract	Laminated plates are often modeled with infinite dimensions in terms of the so-called Whitney-Nuismer (WN) stress criteria, which form a theoretical basis for predicting the residual properties of open-hole structures. Based upon the WN stress criteria, this study derived a new formulation involving finite width; the effects of notch shape and size on the applicability of new formulae and the tensile properties of carbon-fiber-reinforced plastic (CFRP) laminates were investigated via experimental and theoretical analyses. The specimens were prepared by using laminates reinforced by plain woven carbon fiber fabrics and machined with or without an open circular hole or a straight notch. Standard tensile tests were performed and measured using the digital image correlation (DIC) technique, aiming to characterize the full-field surface strain. Continuum damage mechanics (CDMs)-based finite element models were developed to predict the stress concentration factors and failure processes of notched specimens. The characteristic distances in the stress criterion models were calibrated using the experimental results of un-notched and notched specimens, such that the failure of carbon fiber laminates with or without straight notches could be analytically predicted. The experimental results demonstrated well the effectiveness of the present formulations. The new formula provides an effective approach to implementing a finite-width stress criterion for evaluating the tensile properties of notched fiber-reinforced laminates. In addition, the notch size has a great effect on strength prediction while the fiber direction has a great influence on the fracture mode.
dc.format	Electronic
dc.language	eng
dc.publisher	MDPI
dc.relation.ispartof	Polymers (Basel)
dc.relation.isbasedon	10.3390/polym14245552
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	03 Chemical Sciences, 09 Engineering
dc.title	A New Stress-Based Formulation for Modeling Notched Fiber-Reinforced Laminates.
dc.type	Journal Article
utslib.citation.volume	14
utslib.location.activity	Switzerland
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	open_access	*
dc.date.updated	2023-03-12T22:59:15Z
pubs.issue	24
pubs.publication-status	Published online
pubs.volume	14
utslib.citation.issue	24

Abstract:

Laminated plates are often modeled with infinite dimensions in terms of the so-called Whitney-Nuismer (WN) stress criteria, which form a theoretical basis for predicting the residual properties of open-hole structures. Based upon the WN stress criteria, this study derived a new formulation involving finite width; the effects of notch shape and size on the applicability of new formulae and the tensile properties of carbon-fiber-reinforced plastic (CFRP) laminates were investigated via experimental and theoretical analyses. The specimens were prepared by using laminates reinforced by plain woven carbon fiber fabrics and machined with or without an open circular hole or a straight notch. Standard tensile tests were performed and measured using the digital image correlation (DIC) technique, aiming to characterize the full-field surface strain. Continuum damage mechanics (CDMs)-based finite element models were developed to predict the stress concentration factors and failure processes of notched specimens. The characteristic distances in the stress criterion models were calibrated using the experimental results of un-notched and notched specimens, such that the failure of carbon fiber laminates with or without straight notches could be analytically predicted. The experimental results demonstrated well the effectiveness of the present formulations. The new formula provides an effective approach to implementing a finite-width stress criterion for evaluating the tensile properties of notched fiber-reinforced laminates. In addition, the notch size has a great effect on strength prediction while the fiber direction has a great influence on the fracture mode.

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http://hdl.handle.net/10453/167087