Process-Induced Residual Stress Analysis of As4/3501-6 Composite Material

White, Scott R.; Kim, Yeong K.

doi:10.1080/10759419808945897

Cited by 156 publications

(111 citation statements)

References 34 publications

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“…To avoid this issue, prediction of the dimensional changes has been of interest to many investigators who tried to address the issue by developing simple equations [53,54] as well as analytical and numerical models [6,12,25,26,30,32,[55][56][57][58][59][60]. The model that incorporates more phenomena can provide more accurate predictions.…”

Section: Numerical Modelsmentioning

confidence: 99%

Experimental and numerical study of distortion in flat, L‐shaped, and U‐shaped carbon fiber–epoxy composite parts

Roozbehjavan

Tavakol

Ahmed

et al. 2014

J of Applied Polymer Sci

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In this study, flat composite panels were fabricated to find the effect of different manufacturing parameters, including stacking sequence, part thickness, and tooling material, on distortion of carbon fiber‐epoxy composite parts. L‐shaped and U‐shaped panels were also made to investigate the effect of stacking sequence on spring‐in angle and warpage of the curved panels. Results showed that distortion of the flat panels caused by asymmetry in the stacking sequence was an order of magnitude greater than distortion of the panels with an unbalanced stacking sequence; whereas in the curved panels, the panel with an asymmetric stacking sequence showed the least spring‐in angle, and the largest angle was observed in the symmetric panel. MSC Marc was used to predict distortion of the panels, and the simulation results were compared with the experimental results for several stacking sequences of the flat and the L‐shaped panels. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40439.

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Section: Numerical Modelsmentioning

confidence: 99%

Experimental and numerical study of distortion in flat, L‐shaped, and U‐shaped carbon fiber–epoxy composite parts

Roozbehjavan

Tavakol

Ahmed

et al. 2014

J of Applied Polymer Sci

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“…They validated their model through the intermittent cure of non-symmetric cross-ply laminates and measuring process induced residual curvatures. White and Kim [3] introduced a thermo-viscoelastic constitutive equation that depended on the degree of cure and temperature. They then investigated the formation of residual stresses in Hercules AS4/3501-6 composite during an entire cure cycle using a 2D finite element model.…”

Section: Introductionmentioning

confidence: 99%

“…These traditional elastic models omit the effects of chemical shrinkage, the development of residual stress before cool-down and stress relaxation during the cooling process. These factors are known to have significant effects on the final residual stresses in PMCs [3,4]. To capture the influence of these factors, a variety of revised cure-dependent elastic models have been proposed [4][5][6][7], such as a path dependent constitutive model [4,5] and the cure-hardening, instantaneous linear elastic (CHILE) model [7].…”

Section: Introductionmentioning

confidence: 99%

“…Some of the earliest work on the residual stresses in composite materials using a viscoelastic approach was performed by Weitsman [10], although focusing only on the cooling process. White and Hahn [11,3 12] developed a process-dependent viscoelastic model to investigate the formation of residual stress in composite laminates during the entire cure cycle. They validated their model through the intermittent cure of non-symmetric cross-ply laminates and measuring process induced residual curvatures.…”

Section: Introductionmentioning

confidence: 99%

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Residual stresses created during curing of a polymer matrix composite using a viscoelastic model

Zhang

et al. 2016

Composites Science and Technology

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. limited ranges of the Deborah number. By considering the evolution of the Deborah number during curing of the AS4/3501-6 composite, the composite is in a fully relaxed state when it is cured at high temperature and the degree of cure is lower than 0.73, and no further changes in the viscoelastic characteristics when the degree of cure is higher than 0.8. A 3D simulation of a composite laminate plate is used to predict the evolution of the residual stresses. The analysis reveals that the accurate simulation on the cure-induced residual stress should include the last two states of the entire cure process, and consider the stress relaxation, thermal deformation and chemical shrinkage.

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“…Although much effort has been spent in order to model internal stress, by taking into account complex material behaviour [1], by considering in great detail the actual service life of structural parts put into service [2,3], still a great challenge is to measure such stresses, adequately.…”

Section: Introductionmentioning

confidence: 99%

On the nonlinear deformations of thin unsymmetric 0/90 composite plates under hygrothermal loads

Gigliottia

Molimard

Jacquemin

et al. 2006

Composites Part A: Applied Science and Manufacturing

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Erreur dans le nom d'auteur (Gigliotti au lieu de Gigliottia) voir corrigendum doi:10.1016/j.compositesa.2006.12.001International audienceThe present paper introduces a new method to characterise internal stresses induced by hygrothermal loads on composite laminated plates. The method consists in measuring by the fringe projection technique the full displacement field induced by temperature or moisture absorption on plates with tension-bending coupling, 0/90 unsymmetric plates for instance: internal stresses, whatever the plate typology, can be inferred by such measurements by using a classical theory of plates. When 0/90 plates are very thin, the behaviour can be rather complex, as deformations occur to behave nonlinearly with temperature or absorbed moisture, due to the presence of large displacements. We show the ability of the method to catch experimentally such a nonlinear behaviour and we compare results with a model which takes into account the effect of large displacements

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Process-Induced Residual Stress Analysis of As4/3501-6 Composite Material

Cited by 156 publications

References 34 publications

Experimental and numerical study of distortion in flat, L‐shaped, and U‐shaped carbon fiber–epoxy composite parts

Experimental and numerical study of distortion in flat, L‐shaped, and U‐shaped carbon fiber–epoxy composite parts

Residual stresses created during curing of a polymer matrix composite using a viscoelastic model

On the nonlinear deformations of thin unsymmetric 0/90 composite plates under hygrothermal loads

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