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Optimisation of local in-plane constraining forces in double diaphragm forming

Chen, S.; McGregor, O.P.L.; Harper, L.T.; Endruweit, A.; Warrior, N.A.

Authors

S. Chen

O.P.L. McGregor

LEE HARPER LEE.HARPER@NOTTINGHAM.AC.UK
Associate Professor - Composites Manufacturing

NICHOLAS WARRIOR nick.warrior@nottingham.ac.uk
Professor of Mechanical Engineering & Head of Research Division



Abstract

Rigid blocks (risers) were introduced in the double diaphragm forming (DDF) process to change the local in-plane strain distribution in the diaphragms, aimed at reducing wrinkling defects in the production of fabric preforms. A two-step optimisation method was developed to determine the position and dimension of each riser. In Step I, optimisation of the riser position was conducted using a simplified finite element (FE) model coupled with a genetic algorithm (GA). The height of each riser was optimised in Step II using a detailed FE model with the optimised riser positions from Step I. For demonstration, a hemisphere preform was manufactured by DDF using the optimum riser arrangement established by the optimisation routine. Results indicate that the optimum riser pattern (shape and position relative to the component boundary) can dramatically improve the preform quality through reduction of out-of-plane wrinkles, validating the feasibility of the two-step routine.

Citation

Chen, S., McGregor, O., Harper, L., Endruweit, A., & Warrior, N. (in press). Optimisation of local in-plane constraining forces in double diaphragm forming. Composite Structures, https://doi.org/10.1016/j.compstruct.2018.06.062

Journal Article Type Article
Acceptance Date Jun 16, 2018
Online Publication Date Jun 18, 2018
Deposit Date Jun 19, 2018
Publicly Available Date Jun 19, 2019
Journal Composite Structures
Print ISSN 0263-8223
Electronic ISSN 0263-8223
Publisher Elsevier
Peer Reviewed Peer Reviewed
DOI https://doi.org/10.1016/j.compstruct.2018.06.062
Public URL http://eprints.nottingham.ac.uk/id/eprint/52507
Publisher URL https://www.sciencedirect.com/science/article/pii/S0263822318304239
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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1-s2.0-S0263822318304239-main.pdf (7.1 Mb)
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf


1-s2.0-S0263822318304239-main.pdf (8.4 Mb)
PDF

Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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