Characterising the variability in wrinkling during the preforming of non-crimp fabrics
Characterising the variability in wrinkling during the preforming of non-crimp fabrics
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DOI：
10.1016/j.compositesa.2021.106536
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发表时间：
2021-07-10
影响因子：
8.7
通讯作者：
Sutcliffe, M. P. F.
中科院分区：
文献类型：
--
作者：
Viisainen, J. V.;Sutcliffe, M. P. F.
在复合材料制造过程中，纺织增强材料的预成型受到显著的变异性的影响，这影响了关键缺陷的可预测性，例如部件中的褶皱。因此，需要量化起皱的可变性，以便在生产和工艺模拟过程中能够考虑到它。这项研究描述了在不同条件下，双轴向无卷曲织物在半球形预成形过程中起皱行为的变异性。提出了一种变异性表征方法，对褶皱幅度和褶皱位置的变异性进行解耦和量化。结果表明，织物结构和成形层数对起皱幅度和位置变异性均有显著影响，其中位置变异性对成形过程中的变化比振幅变异性更为敏感。该方法可用于表征各种表面缺陷或变量的可变性，从而作为预成形工艺的基准工具。
The preforming of textile reinforcements during composite manufacturing is subject to significant variability, which affects the predictability of critical defects such as wrinkles in the component. Therefore, wrinkling variability needs to be quantified so that it can be accounted for during production and in process simulations. This study characterises the variability in the wrinkling behaviour of a biaxial non-crimp fabric during hemispherical preforming under various conditions. A variability characterisation method is developed that decouples and quantifies the variability in wrinkle amplitude and wrinkle location. The results show that the fabric architecture and the specific forming layup have a significant influence on both the wrinkle amplitude and location variability, with the location variability being more sensitive to changes in the forming process than the amplitude variability. The method can be applied to characterise the variability for various surface defects or variables and thus used as a benchmarking tool for preforming processes.