Formability optimisation of fabric preforms by controlling material draw-in through in-plane constraints
Formability optimisation of fabric preforms by controlling material draw-in through in-plane constraints
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DOI：
10.1016/j.compositesa.2015.05.006
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发表时间：
2015-09-01
影响因子：
8.7
通讯作者：
Warrior, N. A.
中科院分区：
文献类型：
--
作者：
Chen, S.;Harper, L. T.;Warrior, N. A.
采用遗传算法和有限元模型相结合的方法对复合材料冲压成形的约束条件进行优化。使用一系列弹簧，通过夹紧纤维预制件局部施加平面内张力，以控制材料拉伸。优化过程旨在通过确定约束夹的最佳位置和尺寸以及连接弹簧的刚度来最小化局部平面内剪切角。结果提出了一个双圆顶几何，这是验证了从文献数据。利用围绕毛坯周长的面内约束控制材料拉深是均匀化整体剪切角分布和最小化最大值的有效方法。通过两阶段的优化过程，双穹顶的峰值剪切角成功地从48.2度降低到37.2度。(C) 2015 Elsevier Ltd.版权所有。
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.