材料科学
复合材料
刚度
弹性体
纤维增强塑料
复合数
消散
比强度
相(物质)
航空航天
纤维
碳纤维增强聚合物
聚合物
变形(气象学)
物理
热力学
有机化学
化学
法学
政治学
作者
Zhenpeng Xu,Chan Soo Ha,Ruthvik Kadam,John Lindahl,Seokpum Kim,H. Felix Wu,Vlastimil Kunc,Xiaoyu Zheng
标识
DOI:10.1016/j.addma.2020.101106
摘要
Carbon fiber reinforced polymer (CFRP) composite is known for its high stiffness-to-weight ratio and hence is of great interest in several engineering fields such as aerospace, automotive, defense, etc. However, such a composite is not suitable for energy dissipation as failure occurs with very little or no plastic deformation. Herein, we present an extendable multi-material projection microstereolithography process capable of producing carbon-fiber-reinforced cellular materials that achieve simultaneously high specific stiffness and damping coefficient. Inspired by the upper bounds of stiffness-loss coefficient in a two-phase composite, we designed and additively manufactured CFRP microlattices with soft phases architected into selected stiff-phase struts. Our results, confirmed by experimental and analytical calculations, revealed that the damping performance can be significantly enhanced by the addition of only a small fraction of the soft phase. The presented design and additive manufacturing strategy allow for optimizing mutually exclusive properties. As a result, these CFRP microlattices achieved high specific stiffness comparable to commercial CFRP, technical ceramics, and composites, while being dissipative like elastomers.
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