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.

Abstract

© 2018 Elsevier Ltd 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. P., Harper, L. T., Endruweit, A., & Warrior, N. A. (2018). Optimisation of local in-plane constraining forces in double diaphragm forming. Composite Structures, 201, 570-581. 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
• Publication Date: Oct 1, 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
• Volume: 201
• Pages: 570-581
• DOI: https://doi.org/10.1016/j.compstruct.2018.06.062
• Public URL: https://nottingham-repository.worktribe.com/output/939466
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0263822318304239
• Additional Information: This article is maintained by: Elsevier; Article Title: Optimisation of local in-plane constraining forces in double diaphragm forming; Journal Title: Composite Structures; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.compstruct.2018.06.062; Content Type: article; Copyright: © 2018 Elsevier Ltd. All rights reserved.