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Calculation and Experimental Study on Extrusion Pressure of Resin in 3D Carbon Fiber Preform
Physica Status Solidi (A) - Applications and Materials Science Pub Date : 2020-08-05 , DOI: 10.1002/pssa.202000130 Yuqin Ma 1 , Jie Wang 1 , Yi Chen 1 , Yatao Zhao 1 , Kaifu Li 1 , Hao Jin 1
Physica Status Solidi (A) - Applications and Materials Science Pub Date : 2020-08-05 , DOI: 10.1002/pssa.202000130 Yuqin Ma 1 , Jie Wang 1 , Yi Chen 1 , Yatao Zhao 1 , Kaifu Li 1 , Hao Jin 1
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Three‐dimensional carbon fiber reinforced resin matrix composite can effectively overcome the defects of traditional composite in the interlayer strength and stiffness, and has been widely used. Herein, the threshold infiltration pressure of resin in three‐dimensional carbon fiber preform is respectively calculated as 0.170 and 0.973 MPa from the perspective of statics and dynamics. The static calculation ignores the additional pressure caused by the viscous resistance of the resin during the infiltration process, which deviated greatly from the actual value. Therefore, the dynamics calculation value is used as a reference to extrusion pressure in the experiment. The composites with extrusion pressure of 1, 2, 3, 4, and 5 MPa are prepared by vacuum infiltration hot pressing process. Through the study of the infiltration microstructure and bending fracture morphology of the composite, it is found that when the extrusion pressure is 3 MPa, the preparation effect is the best. At this time, the bending strength of the composite is 540 MPa, which is 92.86% and 71.43% higher than that at 1 and 5 MPa, respectively. It is indicated that the extrusion pressure is a key parameter in the composite preparation process and needs to be selected reasonably.
中文翻译：
3D碳纤维瓶坯中树脂挤出压力的计算与实验研究
三维碳纤维增强树脂基复合材料可有效克服传统复合材料在层间强度和刚度方面的缺陷，已得到广泛应用。在此，从静力学和动力学的观点出发，三维碳纤维预成型体中树脂的阈值渗透压分别计算为0.170和0.973 MPa。静态计算忽略了渗透过程中树脂的粘性阻力所引起的额外压力，该压力与实际值有很大差异。因此，动力学计算值可作为实验中挤出压力的参考。通过真空渗透热压工艺制备出挤出压力为1、2、3、4和5 MPa的复合材料。通过对复合材料的渗透组织和弯曲断裂形态的研究，发现当挤出压力为3 MPa时，制备效果最佳。此时，复合材料的弯曲强度为540MPa，分别比1MPa和5MPa高92.86％和71.43％。结果表明，挤出压力是复合材料制备过程中的关键参数，需要合理选择。
更新日期：2020-10-12
中文翻译：
3D碳纤维瓶坯中树脂挤出压力的计算与实验研究
三维碳纤维增强树脂基复合材料可有效克服传统复合材料在层间强度和刚度方面的缺陷，已得到广泛应用。在此，从静力学和动力学的观点出发，三维碳纤维预成型体中树脂的阈值渗透压分别计算为0.170和0.973 MPa。静态计算忽略了渗透过程中树脂的粘性阻力所引起的额外压力，该压力与实际值有很大差异。因此，动力学计算值可作为实验中挤出压力的参考。通过真空渗透热压工艺制备出挤出压力为1、2、3、4和5 MPa的复合材料。通过对复合材料的渗透组织和弯曲断裂形态的研究，发现当挤出压力为3 MPa时，制备效果最佳。此时，复合材料的弯曲强度为540MPa，分别比1MPa和5MPa高92.86％和71.43％。结果表明，挤出压力是复合材料制备过程中的关键参数，需要合理选择。
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