Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 76, Issue -, Pages 10-19Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2015.05.006
Keywords
Fabrics/textiles; Finite element analysis (FEA); Forming
Funding
- Technology Strategy Board
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A genetic algorithm is coupled with a finite element model to optimise the arrangement of constraints for a composite press-forming study. A series of springs are used to locally apply in-plane tension through clamps to the fibre preform to control material draw-in. The optimisation procedure seeks to minimise local in-plane shear angles by determining the optimum location and size of constraining clamps, and the stiffness of connected springs. Results are presented for a double-dome geometry, which are validated against data from the literature. Controlling material draw-in using in-plane constraints around the blank perimeter is an effective way of homogenising the global shear angle distribution and minimising the maximum value. The peak shear angle in the double-dome example was successfully reduced from 48.2 degrees to 37.2 degrees following a two-stage optimisation process. (C) 2015 Elsevier Ltd. All rights reserved.
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