Multi-scale modelling of moisture diffusion coupled with stress distribution in CFRP laminated composites

Hdl Handle:
http://hdl.handle.net/10545/620592
Title:
Multi-scale modelling of moisture diffusion coupled with stress distribution in CFRP laminated composites
Authors:
Meng, Maozhou; Rizvi, Jahir; Le, Huirong ( 0000-0002-6368-7466 ) ; Grove, Stephen
Abstract:
Laminated composite structures operating in a marine environment are subject to moisture ingress. Due to the slow diffusion process of moisture, the distribution of moisture is not uniform so that the laminates can develop hygrothermal stresses. An accurate prediction of the moisture concentration and the associated hygrothermal stress is vital to the understanding of the effect of marine environment on failure initiation. The present paper investigates the time-dependent moisture diffusion and the stress distribution in carbon fibre reinforced polymeric (CFRP) composites by means of experimental study and Finite Element Analysis (FEA). Samples were made from CFRP pre-preg autoclave-cured, and then immersed in fresh water and sea water at a constant 50 °C for accelerated moisture diffusion. Laminates with [0]16, [90]16, [±45]4s lay-up sequences were investigated. A multiscale 3D FEA model was developed to evaluate the interfacial stresses between polymer matrix and carbon fibre and the stress distribution in the composite laminates. The analysis revealed that both the stress distribution and stress level are time-dependent due to moisture diffusion, and the interphase between fibres and matrix plays an important role in both the process of moisture diffusion and the stress/strain transfer. The interlaminar shear stresses of the laminates induced by hygrothermal expansion exhibited a significant specimen edge effect. This is correlated with the experimental observations of the flexural failure of laminates.
Affiliation:
University of Derby; University of Plymouth
Citation:
Meng, et al (2016) 'Multi-scale modelling of moisture diffusion coupled with stress distribution in CFRP laminated composites,' Composite Structures, 138:295, DOI 10.1016/j.compstruct.2015.11.028
Journal:
Composite Structures
Issue Date:
15-Mar-2016
URI:
http://hdl.handle.net/10545/620592
DOI:
10.1016/j.compstruct.2015.11.028
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S0263822315010314
Type:
Article
Language:
en
ISSN:
2638223
Appears in Collections:
Department of Mechanical Engineering & the Built Environment

Full metadata record

DC FieldValue Language
dc.contributor.authorMeng, Maozhouen
dc.contributor.authorRizvi, Jahiren
dc.contributor.authorLe, Huirongen
dc.contributor.authorGrove, Stephenen
dc.date.accessioned2016-10-17T12:05:57Z-
dc.date.available2016-10-17T12:05:57Z-
dc.date.issued2016-03-15-
dc.identifier.citationMeng, et al (2016) 'Multi-scale modelling of moisture diffusion coupled with stress distribution in CFRP laminated composites,' Composite Structures, 138:295, DOI 10.1016/j.compstruct.2015.11.028en
dc.identifier.issn2638223-
dc.identifier.doi10.1016/j.compstruct.2015.11.028-
dc.identifier.urihttp://hdl.handle.net/10545/620592-
dc.description.abstractLaminated composite structures operating in a marine environment are subject to moisture ingress. Due to the slow diffusion process of moisture, the distribution of moisture is not uniform so that the laminates can develop hygrothermal stresses. An accurate prediction of the moisture concentration and the associated hygrothermal stress is vital to the understanding of the effect of marine environment on failure initiation. The present paper investigates the time-dependent moisture diffusion and the stress distribution in carbon fibre reinforced polymeric (CFRP) composites by means of experimental study and Finite Element Analysis (FEA). Samples were made from CFRP pre-preg autoclave-cured, and then immersed in fresh water and sea water at a constant 50 °C for accelerated moisture diffusion. Laminates with [0]16, [90]16, [±45]4s lay-up sequences were investigated. A multiscale 3D FEA model was developed to evaluate the interfacial stresses between polymer matrix and carbon fibre and the stress distribution in the composite laminates. The analysis revealed that both the stress distribution and stress level are time-dependent due to moisture diffusion, and the interphase between fibres and matrix plays an important role in both the process of moisture diffusion and the stress/strain transfer. The interlaminar shear stresses of the laminates induced by hygrothermal expansion exhibited a significant specimen edge effect. This is correlated with the experimental observations of the flexural failure of laminates.en
dc.language.isoenen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0263822315010314en
dc.rightsArchived with thanks to Composite Structuresen
dc.subjectFibre reinforced compositesen
dc.subjectMechanics of compositesen
dc.subjectMultiscale modellingen
dc.subjectDiffusionen
dc.titleMulti-scale modelling of moisture diffusion coupled with stress distribution in CFRP laminated compositesen
dc.typeArticleen
dc.contributor.departmentUniversity of Derbyen
dc.contributor.departmentUniversity of Plymouthen
dc.identifier.journalComposite Structuresen
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