Experimentally and analyzed property of carbon fiber reinforced thermoplastic and thermoset plates

M. Okayasu, Y. Tsuchiya, Hiroaki Arai
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引用次数: 4

Abstract

The tensile and fatigue properties of long unidirectional (UD) and crossply (CR) carbon fiber reinforced plastics (CFRPs) were investigated. The CFRPs in this study were fabricated from 60% CF and various resins: epoxy, polyamide (PA6), polyphenylene sulfide (PPS), and polyether ether ketone (PEEK). The ultimate tensile strength sUTS of Epoxy-CFRP was found to be about twice that of PEEK-CFRP. Relatively high tensile strengths were found for PPS- and PA6-CFRP in the thermoset resin group, although these were still only about 85% of the strength of epoxy-CFRP. The tensile and fatigue strengths of the CR-CFRPs were less than half those of the UD-CFRPs, even though high ductilities were found for the CR-CFRPs. These high ductilities can be attributed to the crosslinking fiber effect and the low proportion of CFs in the loading direction. The sUTS values of CFRPs depend not only on the tensile strengths s and volume fractions V of CF and resin (i.e., through the conventional compound law sUTS = sfiberVfiber + sresinVresin), but also on several material properties, including the wettability of the CF by the resin. On the basis of the material properties, the ultimate tensile strengths of various UD- and CR-CFRPs were well estimated numerically through a statistical analysis, which afforded better estimates than those obtained from the compound law.
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对碳纤维增强热塑性和热固性板材的性能进行了实验分析
研究了长单向(UD)和交叉(CR)碳纤维增强塑料(CFRPs)的拉伸和疲劳性能。本研究用60%的CF和各种树脂(环氧树脂、聚酰胺(PA6)、聚苯硫醚(PPS)和聚醚醚酮(PEEK))制备cfrp。环氧- cfrp的极限抗拉强度sUTS约为PEEK-CFRP的2倍。在热固性树脂组中,PPS-和PA6-CFRP的抗拉强度相对较高,尽管它们仍然只有环氧- cfrp强度的85%左右。CR-CFRPs的拉伸强度和疲劳强度不到UD-CFRPs的一半,尽管CR-CFRPs的延展性很高。这些高延展性可归因于交联纤维效应和低比例的碳纤维在加载方向。cfrp的sUTS值不仅取决于CF和树脂的抗拉强度s和体积分数V(即通过常规的复合规律sUTS = sfiberVfiber + sresinVresin),还取决于几种材料性能,包括CF被树脂的润湿性。在材料性能的基础上,通过统计分析对UD-和cr - cfrp的极限抗拉强度进行了较好的数值估计,其估计结果优于复合规律。
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