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首页> 外文期刊>Advanced Composite Materials: The Official Journal of the Japan Society of Composite Materials >Correlation of damage resistance under low velocity impact and Mode II delamination resistance in CFRP laminates
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Correlation of damage resistance under low velocity impact and Mode II delamination resistance in CFRP laminates

机译：CFRP层压板在低速冲击下的抗损伤性与II型抗分层性的相关性

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摘要

Investigated in this study was the correlation of the damage resistance under low velocity impact and Mode II interlaminar fracture toughness in five material systems, namely, T800/3631 (CF/Epoxy), UT500/PEEK (CF/PEEK), AS4/PEEK (CF/PEEK), IM7/PIX-A (CF/Polyimide) and T800/3900-2 (CF/Toughened Epoxy). These materials can be roughly divided into two types. One is a compatible type, which shows high impact resistance under low velocities with high Mode II delamination resistance. The other type is a non-compatible type, which has poor impact resistance at low velocities, even though it has superior Mode II delamination resistance. As for the system of T800/3631, T800/3900-2 and IM7/PIX-A composites, the Impact Energy (IE)/Damage Area (DA) ratio correlates well with GIIC(0 : PMAX), Mode II energy release rate characterized at PMAX, and GIIR(0), Mode II energy release rate in propagation, for the 0/0 interface. The system of these materials is the compatible type. On the other hand, as for the system of T800/3631, UT500/PEEK and AS4/PEEK composites, the IE/DA ratio correlates well with GIIC(PNL), Mode II energy release rate characterized at PNL, for 0/0 and 22.5/-22.5 interfaces. The system of these materials is the non-compatible type. It is suggested that the main reason for the difference in behavior of these two types is that the compatible type has the superior Mode II delamination resistance in the sub-critical crack growth region and propagation. It correlates with the superior impact resistance under low velocities. [References: 7]
机译：本研究调查了五种材料系统（T800 / 3631（CF / Epoxy），UT500 / PEEK（CF / PEEK），AS4 / PEEK（5）中低速冲击下的抗损伤性与II型层间断裂韧性的相关性。 CF / PEEK），IM7 / PIX-A（CF /聚酰亚胺）和T800 / 3900-2（CF /增韧环氧树脂）。这些材料可以大致分为两种类型。一种是兼容型，它在低速下显示出高抗冲击性，并且具有高的II型抗分层性。另一种类型是不兼容类型，即使它具有出色的II型抗分层性，在低速下抗冲击性也很差。对于T800 / 3631，T800 / 3900-2和IM7 / PIX-A复合材料的系统，冲击能量（IE）/损伤面积（DA）比率与GIIC（0：PMAX），模式II的能量释放率具有很好的相关性0/0接口的特征在于PMAX和GIIR（0），即模式II传播时的能量释放速率。这些材料的系统是兼容类型。另一方面，对于T800 / 3631，UT500 / PEEK和AS4 / PEEK复合材料的系统，IE / DA比与GIIC（PNL），PNL表征的II型能量释放率，0/0和22.5 / -22.5接口。这些材料的系统是不兼容的类型。建议这两种类型的行为不同的主要原因是相容类型在亚临界裂纹扩展区域和扩展中具有优异的II型抗分层性。它与低速下的优异抗冲击性相关。 [参考：7]

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