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Structural Engineering and Mechanics Volume 5, Number 5, September 1997 , pages 609-624 DOI: https://doi.org/10.12989/sem.1997.5.5.609 |
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Multiple cutout optimization in composite plates using evolutionary structural optimization |
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Falzon BG, Steven GP, Xie MY
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| Abstract | ||
| The optimization of cutouts in composite plates was investigated by implementing a procedure known as Evolutionary Structural Optimization. Perforations were introduced into a finite element mesh of the plate from which one or more cutouts of a predetermined size were evolved. In the examples presented, plates were rejected from around each evolving cutout based on a predefined rejection criterion. The Limiting ply within each plate element around the cutout was determined based on the Tsai-Hill failure criterion. Finite element plates with values below the product of the average Tsai-Hill number and a rejection criterion were subsequently removed. This process was iterated until a steady state was reached and the rejection criterion was then incremented by an evolutionary rate and the above steps repeated until the desired cutout area was achieved. Various plates with differing lay-up and loading parameters were investigated to demonstrate the generality and robustness of this optimization procedure. | ||
| Key Words | ||
| composite plates, optimization, evolutionary structural optimization, cutouts, failure criterion, biaxial, shear | ||
| Address | ||
| Falzon BG, UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,DEPT AERONAUT,PRINCE CONSORT RD,LONDON SW7 2BY,ENGLAND UNIV SYDNEY,DEPT AERONAUT ENGN,SYDNEY,NSW 2006,AUSTRALIA VICTORIA UNIV TECHNOL,DEPT CIVIL & BLDG ENGN,MELBOURNE,VIC 8001,AUSTRALIA | ||