Local Failure Modes and Critical Buckling Loads of a Meta-Functional Auxetic Sandwich Core for Composite Bridge Bearing Applications

This paper presents a novel meta-functional auxetic unit (MFAU) cell designed to improve performance and weight ratio for structural bridge bearing applications. Numerical investigations were conducted using three-dimensional finite element models validated by experimental results. The validated mod...

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Autores principales:	Pasakorn Sengsri, Sakdirat Kaewunruen
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	meta-functional auxetic unit (MFAU) cell local failure modes auxetic behaviour Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/5fad349646214e858cd605c1f12c94d0
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spelling	oai:doaj.org-article:5fad349646214e858cd605c1f12c94d02021-11-25T16:39:14ZLocal Failure Modes and Critical Buckling Loads of a Meta-Functional Auxetic Sandwich Core for Composite Bridge Bearing Applications10.3390/app1122108442076-3417https://doaj.org/article/5fad349646214e858cd605c1f12c94d02021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/10844https://doaj.org/toc/2076-3417This paper presents a novel meta-functional auxetic unit (MFAU) cell designed to improve performance and weight ratio for structural bridge bearing applications. Numerical investigations were conducted using three-dimensional finite element models validated by experimental results. The validated models were exposed to compression and buckling actions to identify structural failure modes, with special attention placed on the global behaviours of the meta-functional auxetic (MFA) composite bridge bearing. This bearing uses an unprecedented auxetic sandwich core design consisting of multiple MFAU cells. Numerical predictions of the elastic local critical buckling loads of the MFAU cell were in excellent agreement with both the analytical and experimental results, with an observed discrepancy of less than 1%. These results demonstrate that local buckling failures of MFAU cells can potentially be incurred prior to yielding under compression due to their slenderness ratios. Surprisingly, the designed sandwich core used in the MFA composite bridge bearing model can mimic an auxetic structure with significant crashworthiness, implying that this novel core composite structure can be tailored for structural bridge bearing applications. Parametric studies were thus carried out in order to enrich our insight into the MFA composite elements. These insights, stemming from both experimental and numerical studies, enable a novel design paradigm for MFAU that can significantly enhance the structural performance of MFA composite bridge bearings in practice.Pasakorn SengsriSakdirat KaewunruenMDPI AGarticlemeta-functional auxetic unit (MFAU) celllocal failure modesauxetic behaviourTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10844, p 10844 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	meta-functional auxetic unit (MFAU) cell local failure modes auxetic behaviour Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	meta-functional auxetic unit (MFAU) cell local failure modes auxetic behaviour Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Pasakorn Sengsri Sakdirat Kaewunruen Local Failure Modes and Critical Buckling Loads of a Meta-Functional Auxetic Sandwich Core for Composite Bridge Bearing Applications
description	This paper presents a novel meta-functional auxetic unit (MFAU) cell designed to improve performance and weight ratio for structural bridge bearing applications. Numerical investigations were conducted using three-dimensional finite element models validated by experimental results. The validated models were exposed to compression and buckling actions to identify structural failure modes, with special attention placed on the global behaviours of the meta-functional auxetic (MFA) composite bridge bearing. This bearing uses an unprecedented auxetic sandwich core design consisting of multiple MFAU cells. Numerical predictions of the elastic local critical buckling loads of the MFAU cell were in excellent agreement with both the analytical and experimental results, with an observed discrepancy of less than 1%. These results demonstrate that local buckling failures of MFAU cells can potentially be incurred prior to yielding under compression due to their slenderness ratios. Surprisingly, the designed sandwich core used in the MFA composite bridge bearing model can mimic an auxetic structure with significant crashworthiness, implying that this novel core composite structure can be tailored for structural bridge bearing applications. Parametric studies were thus carried out in order to enrich our insight into the MFA composite elements. These insights, stemming from both experimental and numerical studies, enable a novel design paradigm for MFAU that can significantly enhance the structural performance of MFA composite bridge bearings in practice.
format	article
author	Pasakorn Sengsri Sakdirat Kaewunruen
author_facet	Pasakorn Sengsri Sakdirat Kaewunruen
author_sort	Pasakorn Sengsri
title	Local Failure Modes and Critical Buckling Loads of a Meta-Functional Auxetic Sandwich Core for Composite Bridge Bearing Applications
title_short	Local Failure Modes and Critical Buckling Loads of a Meta-Functional Auxetic Sandwich Core for Composite Bridge Bearing Applications
title_full	Local Failure Modes and Critical Buckling Loads of a Meta-Functional Auxetic Sandwich Core for Composite Bridge Bearing Applications
title_fullStr	Local Failure Modes and Critical Buckling Loads of a Meta-Functional Auxetic Sandwich Core for Composite Bridge Bearing Applications
title_full_unstemmed	Local Failure Modes and Critical Buckling Loads of a Meta-Functional Auxetic Sandwich Core for Composite Bridge Bearing Applications
title_sort	local failure modes and critical buckling loads of a meta-functional auxetic sandwich core for composite bridge bearing applications
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5fad349646214e858cd605c1f12c94d0
work_keys_str_mv	AT pasakornsengsri localfailuremodesandcriticalbucklingloadsofametafunctionalauxeticsandwichcoreforcompositebridgebearingapplications AT sakdiratkaewunruen localfailuremodesandcriticalbucklingloadsofametafunctionalauxeticsandwichcoreforcompositebridgebearingapplications
_version_	1718413079907139584

Local Failure Modes and Critical Buckling Loads of a Meta-Functional Auxetic Sandwich Core for Composite Bridge Bearing Applications

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