Formability evaluation of carbon fiber NCF by a non-contact 3D strain measurement system and the effects of blank folder force on its formability

机译：通过非接触式3D应变测量系统评估碳纤维NCF的可成形性，以及毛坯折叠力对其可成形性的影响

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Non-Crimp Fabric (NCF) consists of unidirectional plies, which are kept together by stitching yarns arranged in a number of different orientations relative to the fabric production direction. Since NCF has no crimp, NCF can take full advantage of the continuous carbon fibers. As NCF is deformed mainly due to shear deformation, it is difficult to form 3D shapes from it. Therefore, formability improvement of NCF by slitting a textile preform has been attempted; however, problems such as strength degradation at a notch and cost increase due to the increase of working process have occurred. So, it is necessary to improve formability of NCF without slitting. One of the methods of formability improvement is to use blank holder force. In previous studies, though the influence of blank holder force on formability of woven fabrics has been clarified, that on formability of NCF is uncertain. In this study, the hemisphere geometry punch drape test was conducted to evaluate the influence of blank holder force on the formability of NCF. Meanwhile, deformation of NCF during the drape test was measured by a non-contact 3D strain measurement system.

机译：非卷曲织物（NCF）由单向帘布层组成，这些单向帘布层是通过沿相对于织物生产方向的许多不同方向排列的缝合纱线缝合在一起的。由于NCF没有卷曲，因此NCF可以充分利用连续碳纤维。由于NCF主要由于剪切变形而变形，因此很难从中形成3D形状。因此，已经尝试通过切开织物预型件来改善NCF的可成形性；但是，这种方法不适合于传统的NCF。但是，由于加工工序的增加，出现了缺口强度降低，成本增加等问题。因此，有必要提高NCF的可成形性而不进行纵切。改善可成形性的方法之一是使用毛坯夹持器力。在先前的研究中，尽管已经弄清了坯料夹持力对机织织物可成形性的影响，但是对NCF成形性的影响尚不确定。在这项研究中，进行了半球几何冲头悬垂试验，以评估坯料夹持器力对NCF成形性的影响。同时，通过非接触式3D应变测量系统测量了悬垂测试中NCF的变形。

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《High performance and optimum design of structures and materials》|2014年|317-326|共10页
会议地点 Ostend(BE)
作者
K. Tanaka; R. Ushiyama; T. Katayama; S. Enoki; H. Sakamoto;
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作者单位

Department of Biomedical Engineering, Doshisha University, Japan;

Department of Biomedical Engineering, Doshisha University, Japan;

Department of Biomedical Engineering, Doshisha University, Japan;

Nara National College of Technology, Japan;

Graduate School of Science and Technology, Kumamoto University, Japan;

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正文语种 eng
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关键词
carbon fibers; non-crimp fabric (NCF); blank holder force; non-contact 3D strain measurement system; drape test;

机译：碳纤维非压接面料（NCF）;坯料夹持力；非接触式3D应变测量系统；悬垂测试;

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Formability evaluation of carbon fiber NCF by a non-contact 3D strain measurement system and the effects of blank folder force on its formability

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