Optimisation of local in-plane constraining forces in double diaphragm forming
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...
| Main Authors: | , , , , |
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| Format: | Article |
| Published: |
Elsevier
2018
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| Online Access: | https://eprints.nottingham.ac.uk/52507/ |
| _version_ | 1848798742283550720 |
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| author | Chen, S. McGregor, O.P.L. Harper, L.T. Endruweit, A. Warrior, N.A. |
| author_facet | Chen, S. McGregor, O.P.L. Harper, L.T. Endruweit, A. Warrior, N.A. |
| author_sort | Chen, S. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-14T20:24:36Z |
| format | Article |
| id | nottingham-52507 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:24:36Z |
| publishDate | 2018 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-525072020-05-04T19:41:26Z https://eprints.nottingham.ac.uk/52507/ 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. 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. Elsevier 2018-06-18 Article PeerReviewed Chen, S., McGregor, O.P.L., Harper, L.T., Endruweit, A. and Warrior, N.A. (2018) Optimisation of local in-plane constraining forces in double diaphragm forming. Composite Structures . ISSN 0263-8223 https://www.sciencedirect.com/science/article/pii/S0263822318304239 doi:10.1016/j.compstruct.2018.06.062 doi:10.1016/j.compstruct.2018.06.062 |
| spellingShingle | Chen, S. McGregor, O.P.L. Harper, L.T. Endruweit, A. Warrior, N.A. Optimisation of local in-plane constraining forces in double diaphragm forming |
| title | Optimisation of local in-plane constraining forces in double diaphragm forming |
| title_full | Optimisation of local in-plane constraining forces in double diaphragm forming |
| title_fullStr | Optimisation of local in-plane constraining forces in double diaphragm forming |
| title_full_unstemmed | Optimisation of local in-plane constraining forces in double diaphragm forming |
| title_short | Optimisation of local in-plane constraining forces in double diaphragm forming |
| title_sort | optimisation of local in-plane constraining forces in double diaphragm forming |
| url | https://eprints.nottingham.ac.uk/52507/ https://eprints.nottingham.ac.uk/52507/ https://eprints.nottingham.ac.uk/52507/ |