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- 2018
玻璃纤维/聚丙烯复合材料层合板拉深成型性
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Abstract:
为研究纤维增强树脂复合材料零部件快速成型，加速复合材料零部件大规模产业化量产，以玻璃纤维/聚丙烯复合材料层合板为实验对象，首先利用设计加工的拉深成型模具，进行了玻璃纤维增强热塑性树脂复合材料（Glass fiber reinforced thermoplastic resin composite，GFRTP）板材外表面纤维方向和模具长轴方向为0°和90°的试件在不同温度和不同拉深深度条件下的深拉深成型实验，将成型件制备金相试件在光学显微镜下进行微观组织观察，并对试件的成型情况和不同拉深力-行程曲线进行分析。其后进行了GFRTP板材外表面纤维方向和模具长轴方向为0°、45°和90°的试件的不同温度下的浅拉深成型实验，并对成型后的试验件进行了室温条件下的拉伸性能测试，对其拉伸失效情况及具体力学性能进行了对比分析。试验结果表明，在室温25℃到基体树脂的熔融温度165℃之间，随着温度的升高，板材的极限拉深深度增大，最大拉深力呈下降趋势。在选取的试验温度范围内，85℃时试件成型性能较好且0°试件优于90°试件，温度对拉深成型试件的皱曲改善不明显。浅拉深成型试件拉伸力学特性受试件铺层纤维方向的影响较大，防止皱曲等缺陷的发生对GFRTP板材拉深成型十分重要。 In order to research the rapid prototyping of fiber reinforced composite parts and accelerate large-scale industrial mass production of composite parts, glass fiber/polypropylene composite laminate was selected to be the experimental object. First, the deep drawing test of glass fiber reinforced thermoplastic resin composite (GFRTP), the outer surface fiber orientation of the sheet and in the long axis direction of 0° and 90° at different temperatures were carried out by using the deep drawing mold. Metallographic specimens were prepared by microstructure observation under a light microscope. The molding of the specimen and the different drawing force-stroke curve were analyzed. The shallow drawing test of the GFRTP along the fiber direction of sheet surface and the direction of the long axis of the mold 0°, 45° and 90° at different temperatures was carried out. Tensile properties were tested at room temperature using the molded test piece. The tensile failure and the specific mechanical properties were compared and analyzed. The results show that, between room temperature of 25℃ and the base resin melting temperature of 165℃, the ultimate drawing depth of the plate increases with the increase of the temperature, and the maximum drawing force decreases.In the range of the selected test temperature, the formability of the specimen at 85℃ is better and the specimen at 0° is better than the specimen at 90°. The temperature does not improve the wrinkle of the specimen.The tensile mechanical properties of the specimen are greatly affected by the direction of the laying fiber of the specimen, and it is very important to prevent the occurrence of defects such as wrinkles. 留学人员科技活动择优资助项目（CG2016003001）
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