Characterization and Analysis of In-Plane Shear Behavior of Glass Warp-Knitted Non-Crimp Fabrics Based on Picture Frame Method.
Characterization and Analysis of In-Plane Shear Behavior of Glass Warp-Knitted Non-Crimp Fabrics Based on Picture Frame Method.
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基于画框法的玻璃经编无屈曲织物面内剪切行为表征与分析
DOI：
10.3390/ma11091550
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发表时间：
2018-08-28
期刊：
影响因子：
--
通讯作者：
Chen N
中科院分区：
文献类型：
--
作者：
Habboush A;Sanbhal N;Shao H;Jiang J;Chen N
玻璃经编织物已广泛应用于复合材料的复杂结构增强，如风力发电机叶片、船舶、车辆等。了解这些纺织品的力学行为和可成形性对于制造前的成形过程模拟是非常必要的。本文利用安装在万能试验机上的相框测试装置，对玻璃经编无卷曲织物的剪切变形力学进行了实验研究。采用相框法对三种市售WKNCFs织物进行了四次循环试验。目的是表征和比较相对较高的面密度织物的剪切行为在复合材料的预成型加工。利用能量归一化理论从试验机数据中得到归一化剪切力；然后，利用三次多项式回归方程拟合剪切角对剪应力的影响。由方程得到的结果表明，面内剪切刚度模量与剪切角有关。分析了剪切周期和拼接方式对剪切抗力的影响。
Glass warp-knitted fabrics have been widely used as complex structural reinforcements in composites, such as wind turbine blades, boats, vehicles, etc. Understanding the mechanical behavior and formability of these textiles is very necessary for the simulation of forming processes before manufacturing. In this paper, the shear deformation mechanics of glass warp-knitted non-crimp fabrics (WKNCF) were experimentally investigated based on a picture frame testing apparatus equipped to a universal testing machine. Three commercially available fabrics of WKNCFs were tested for four cycles by the picture frame method. The aim was to characterize and compare the shear behavior of relatively high areal density fabrics during preform processing for composites. The energy normalization theory was used to obtain the normalized shear force from the testing machine data; then, the shear stress against the shear angle was fitted by cubic polynomial regression equations. The results achieved from the equations demonstrated that the in-plane shear rigidity modulus was associated with the shear angle. The effect of the shearing cycles and stitching pattern on shear resistance was also analyzed.
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