Formability analyses of uni-directional and textile reinforced thermoplastics
Formability analyses of uni-directional and textile reinforced thermoplastics
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DOI：
10.1016/j.compositesa.2013.09.009
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发表时间：
2014-01-01
影响因子：
8.7
通讯作者：
Akkerman, R.
中科院分区：
文献类型：
--
作者：
Haanappel, S. P.;ten Thije, R. H. W.;Akkerman, R.
对航空航天工业中两种不同复合材料的成形性能进行了研究。分析了准各向同性铺层的碳UD/PEEK和玻璃8HS/ PPS坯料在成形过程中的变形。UD/PEEK产品在双弯曲区域表现出严重的起皱，而8HS/PPS产品在这些区域表现出更好的成形性。这可以用UD/PEEK材料相对较高的抗层内剪切阻力来解释。此外，还展示了基于有限元的仿真工具的预测能力。对于这两种材料，层内剪切和大褶皱的预测与实际产品中观察到的结果一致。产品中较小的皱纹不能用所使用的元件尺寸准确地表示。然而，在相应位置预测的波浪度可以指示产品的关键区域。所提出的建模方法在复合材料产品设计过程中具有很大的应用潜力。(C) 2013 Elsevier Ltd.版权所有。
The formability of two different composite materials used in aerospace industry has been investigated for a representative product geometry. The deformations during forming of carbon UD/PEEK and glass 8HS/ PPS blanks with a quasi-isotropic lay-up were analysed. The UD/PEEK product showed severe wrinkling in doubly curved areas, whereas the 8HS/PPS product showed better formability in those areas. This can be explained by the relatively high resistance against intra-ply shear for the UD/PEEK material. Moreover, the predictive capability of a finite element based simulation tool was shown. For both materials, the prediction of intra-ply shear and large wrinkles showed good agreement with those observed in the actual product. The smaller wrinkles in the products cannot be accurately represented with the element size used. However, predicted waviness at the corresponding locations could indicate critical areas in the product. The presented modelling approach shows great potential for application in the composite product design process. (C) 2013 Elsevier Ltd. All rights reserved.