Tool–part interaction in composites processing. Part I: experimental investigation and analytical model

Twigg, Graham; Poursartip, Anoush; Fernlund, G.

doi:10.1016/s1359-835x(03)00131-3

Cited by 155 publications

(70 citation statements)

References 7 publications

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“…Furthermore, it was evident that the thinner panels showed more distortion than the thicker panels while an identical stacking sequence was applied due to reduced stiffness of the thinner panels. The results showed satisfactory agreement with previous studies [9,10]. Figure 32.…”

Section: Effect Of Part Thicknesssupporting

confidence: 91%

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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: Effect Of Part Thicknesssupporting

confidence: 91%

“…Most previous studies have reported the 2D distortion of panels which were narrow on one side and sufficiently long on the other side only to eliminate the 3D nature of distortions [9,10]. However, the distortions that occur in cured panels are often 3D and the assumption of simple 2D distortions is far from the truth.…”

Section: Thesis Overviewmentioning

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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“…By prepreg-autoclave processes the warpage is considering to be induced by the tool-part interaction [1]. Stresses are transferred during the curing due to the differential coefficients of thermal expansion between the mould and the part and induce after demoulding warpage.…”

Section: Introductionmentioning

confidence: 99%

Warpage of Flat Composite Part Induced by Liquid Resin Infusion (LRI) Processes

2010

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Composite materials manufacturing of high performance part require high cure temperature in a multimaterial environment. It results multi-scale product-process-resources interactions, which are responsible for low dimensional fidelity between the mould and the part shape. Because of the different implementation by LRI processes, warpage cannot be account only for tool-part interaction like by prepreg-autoclave processes. An interaction between the part and the moulding resources are characterized, which is in majority responsible of the part warpage. Experimental setups were developed to investigate the main mechanisms of deformation present by LRI processes. The deformations due to the part-moulding resources interaction have been experimentally isolated and the influences of main driver parameters have been quantified. A simple mechanical model based on the thermal and cure behaviours of the part and the resources are proposed to predict the warpage. The model correlates with an acceptable accuracy the experimental warpage of different part lengths and part thick.

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“…Interply tool/ply friction influences the stress-build up, which, if remaining after curing, results in residual stresses influencing the shape distortions [2,3,19]. The importance of taking the interply friction into account is stated by for example Gorczyca-Cole et al [20], Vanclooster et al [21] and ten Thije et al [22], all studying thermoplastic composites.…”

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confidence: 99%

In-plane deformation of multi-layered unidirectional thermoset prepreg – Modelling and experimental verification

Larberg

Åkermo

2014

Composites Part A: Applied Science and Manufacturing

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Sheet forming of unidirectional prepregs is gaining increased interest as a cost efficient alternative manufacturing method. Its potential lies within the use of automatically and efficiently stacked flat prepregs, which in a second step can be formed. A successful forming requires understanding of the properties of the uncured material. Here, the in-plane deformation behaviour of two different unidirectional thermoset prepregs is investigated. Experimental measurements are performed, showing the importance of stacking sequence and its effect on the forming behaviour of stacked prepreg. Finite element models are developed, using material models calibrated from bias extension tests and interlaminar friction tests. The method developed can be used to predict the reaction force and fibre reorientation during in-plane forming of thermoset prepreg, for one of the considered material systems. Further, it enables prediction of the effect of stacking sequence, which is promising for future full-scale forming simulations.

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Tool–part interaction in composites processing. Part I: experimental investigation and analytical model

Cited by 155 publications

References 7 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

Warpage of Flat Composite Part Induced by Liquid Resin Infusion (LRI) Processes

In-plane deformation of multi-layered unidirectional thermoset prepreg – Modelling and experimental verification

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