Abstract Epoxy- and vinyl ester-based carbon fibre reinforced sheet moulding compounds (CF-SMCs) were industrially processed and impact tested to characterise their impact energy absorption performance. Particularly, thin-walled CF-SMC components were manufactured via a high volume compression moulding process, and were subjected to both ~9 m/s and ~13 m/s dynamic impacts with kinetic energies of ~3.3 kJ and ~6.6 kJ respectively. The mass-specific energy absorption (SEA) for epoxy-based CF-SMC ranged from 50 to 60 J/g whereas the SEA for vinyl ester material ranged from 24 to 29 J/g. In addition, the effect of the manufacturing process and the resultant reinforcement architecture on the energy absorption properties was investigated. Epoxy CF-SMC components were manufactured using conventional SMC flow forming and using ‘pre-formed’ near-net shape blanks (low/zero flow condition) and their performance compared. Local microstructure and fractography analyses were conducted for each sample type to explain the observed differences in performance between the individual CF-SMC and manufacturing systems.

中文翻译：

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环氧树脂和乙烯基酯 CF-SMC 用于大容量汽车复合材料碰撞结构的比较研究

摘要 环氧和乙烯基酯基碳纤维增强片状模塑料 (CF-SMC) 进行了工业加工和冲击测试，以表征其冲击能量吸收性能。特别是，薄壁 CF-SMC 组件是通过大容量压缩成型工艺制造的，并分别承受 ~9 m/s 和 ~13 m/s 的动态冲击，动能分别为 ~3.3 kJ 和 ~6.6 kJ。环氧基 CF-SMC 的质量比能量吸收 (SEA) 范围为 50 至 60 J/g，而乙烯基酯材料的 SEA 范围为 24 至 29 J/g。此外，还研究了制造工艺和由此产生的增强结构对能量吸收性能的影响。环氧树脂 CF-SMC 部件是使用传统的 SMC 流动成型和使用“预成型”近净形状毛坯（低/零流动条件）制造的，并且比较了它们的性能。对每种样品类型进行了局部微观结构和断口分析，以解释观察到的单个 CF-SMC 和制造系统之间的性能差异。