Ouyang Xinfeng, Wang Xiao, Chen Qiufei, Ge Guojie, Liu Dong, Lin Kang, Liu Yunpeng, Zong Yangyang, Duan Shuo, Niu Kangmin
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Zhongfu Shenying Carbon Fiber Company Limited, Lianyungang 222069, China.
Polymers (Basel). 2024 Nov 27;16(23):3328. doi: 10.3390/polym16233328.
The study investigated the effects of a toughening agent and micron-sized toughening particles (TP) on the resin and carbon fiber-reinforced polymer (CFRP) composites, with a particular focus on compressive strength. The results showed that the addition of the toughening agent improved the overall mechanical properties of both the resin and CFRP but had a minor effect on the residual compressive strength (CAI) of CFRP after impact. Compared to the pure toughening agent, the addition of TP increased the CAI, GIC, and GIIC of CFRP by 74%, 35%, and 68%, respectively. The SEM, ultrasonic C-scan, and metallographic microscopy were used to analyze the failure morphology and TP distribution. Compared to pure toughening agent modification, the introduction of TP led to the formation of continuous toughening particle layers, which reduced the compression damage area by 61%, significantly balancing and absorbing the load. This modification also resulted in typical kink band damage. This study found that resin toughening significantly improved the compressive strength of CFRP, while micron-sized toughening particles, in the form of toughening layers, notably improved the CAI. These findings provide valuable insights for enhancing the compression and impact resistance of CFRP.
该研究调查了一种增韧剂和微米级增韧颗粒（TP）对树脂及碳纤维增强聚合物（CFRP）复合材料的影响，特别关注了抗压强度。结果表明，增韧剂的添加改善了树脂和CFRP的整体力学性能，但对CFRP冲击后的残余抗压强度（CAI）影响较小。与纯增韧剂相比，TP的添加使CFRP的CAI、GIC和GIIC分别提高了74%、35%和68%。使用扫描电子显微镜（SEM）、超声C扫描和金相显微镜来分析失效形态和TP分布。与纯增韧剂改性相比，TP的引入导致形成连续的增韧颗粒层，使压缩损伤面积减少了61%，显著平衡并吸收了载荷。这种改性还导致了典型的扭结带损伤。该研究发现，树脂增韧显著提高了CFRP的抗压强度，而以增韧层形式存在的微米级增韧颗粒显著提高了CAI。这些发现为增强CFRP的抗压和抗冲击性能提供了有价值的见解。
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