Characterisation of resin transfer moulded composite laminates under high rate tension, compression and shear loading
Characterisation of resin transfer moulded composite laminates under high rate tension, compression and shear loading
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高速率拉伸、压缩和剪切载荷下树脂传递模塑复合材料层压板的表征
DOI：
10.1016/j.engfracmech.2015.07.012
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发表时间：
2015
影响因子：
5.4
通讯作者：
W. Böhme
中科院分区：
文献类型：
--
作者：
J. Lienhard;W. Böhme
研究了采用树脂传递模塑 (RTM) 工艺制造的碳纤维增强塑料 (CFRP) 层压板的应变率依赖性，最高应变率为 102s−1。采用高速视频成像结合数字图像相关分析（DIC）和高速红外摄像机来评估测试。样本专为高负载率测试而设计。观察到周期性应变局部化。因此，在最高应变率下会发生多次断裂。可以确定相当大的应变率依赖性。应力应变曲线以及在 90° 拉伸和压缩的情况下，断裂应变也随着应变速率的增加而适度上升。在 ±45° 加载方向上进行的高速剪切试验显示，与准静态试验相比，硬化程度有所降低，这可能是由绝热加热引起的。通过高速红外测量确定局部温升约为 50 K。
The strain rate dependency of carbon fibre reinforced plastic (CFRP) laminate manufactured in a resin transfer moulding (RTM) process was investigated up to strain rates of 102s−1. High-speed video imaging in combination with digital image correlation analysis (DIC) and high-speed infrared cameras were applied to evaluate the tests. Specimens were specifically designed for tests at high loading rates. Periodic strain localisations were observed. Thus, multiple fractures occurred at the highest strain rate. Considerable strain rate dependence could be identified. The stress strain curves, and in the case of 90° tension and compression also the strain to fracture exhibited a moderate rise with increasing strain rate. High rate shear tests at ±45° loading direction with large, localised deformations up to failure showed reduced hardening compared to quasi-static tests, probably caused by adiabatic heating. A local temperature rise of about 50 K was determined by high-speed infrared measurements.