In Situ Investigation of the Kinematics of Ply Interfaces During Composite Manufacturing
In Situ Investigation of the Kinematics of Ply Interfaces During Composite Manufacturing
复制标题
复合材料制造过程中层界面运动学的现场研究
DOI：
10.1115/1.4047740
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发表时间：
2021
影响因子：
4
通讯作者：
S. Namilae
中科院分区：
文献类型：
--
作者：
S. Chava;S. Namilae
复合材料层界面的运动学严重影响制造工艺和变形机制，并且通常是形成皱纹和分层等缺陷的原因。在目前的工作中，通过设计一种新颖的原位实验方法来评估碳纤维预浸料复合材料中加工引起的缺陷。碳纤维预浸料层压板在专门设计的带有视口的高压釜中固化，层板铺放在模具上，并设置圆柱形工具以最大限度地提高层板运动。参数研究使用 [90/90]、[90/0]、[90/45] 和 [90/−45] 的四层铺层方向以及具有直径为 9.5 毫米（3/8 英寸）、12.7 毫米（1/2 英寸）和 15.9 毫米（5/8 英寸）的圆柱形工具的三模具配置。在高压釜固化周期期间，通过视口使用数字图像相关 (DIC) 现场观察应变、层板移动和缺陷形成。通过 X 射线微计算机断层扫描 (micro-CT) 进一步表征复合材料中加工引起的缺陷。我们观察到，曲率半径较大的模具（15.9 毫米圆柱体）会导致面内方向上的应变更高，面外方向上的位移更高。对于具有最高曲率半径的模具上的[90/−45]s铺层，观察到最大平均平面外层运动以及最大的皱纹。
The kinematics of composite ply interfaces critically affects both the manufacturing processes and deformation mechanisms and is often responsible for the formation of defects such as wrinkles and delamination. In the present work, processing-induced defects in a carbon fiber prepreg composite are evaluated by devising a novel in situ experimental approach. Carbon fiber prepreg laminates are cured in a specially designed autoclave with viewports with plies laid up on a mold with cylindrical tooling set up to maximize the ply-movement. Four-ply layup orientations of [90/90]s, [90/0]s, [90/45]s, and [90/−45]s and three-mold configurations with cylindrical tools of diameter 9.5 mm (3/8 in.), 12.7 mm (1/2 in.), and 15.9 mm (5/8 in.) are used for the parametric study. Strains, ply-movement, and formation of defects are observed in situ using digital image correlation (DIC) during the autoclave cure cycle, through the viewports. The processing-induced defects in the composite are further characterized by X-ray micro-computed tomography (micro-CT). We observed that the mold with the larger radius of curvature (15.9 mm cylinder) leads to higher strains in both in-plane directions and higher displacement in out of plane directions. The maximum average out-of-plane ply movement, as well as the largest wrinkle, are observed for [90/−45]s layup on the mold with the highest radius of curvature.
影响因子：
9.1
作者：
Sutcliffe, M. P. F.;Lemanski, S. L.;Scott, A. E.
通讯作者：
Scott, A. E.
DOI：
10.1016/j.compositesa.2013.03.002
发表时间：
2013-06-01
影响因子：
8.7
作者：
Lightfoot, James S.;Wisnom, Michael R.;Potter, Kevin
通讯作者：
Potter, Kevin