Dynamic properties of pultruded natural fibre reinforced composites using Split Hopkinson Pressure Bar technique
Dynamic properties of pultruded natural fibre reinforced composites using Split Hopkinson Pressure Bar technique
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DOI：
10.1016/j.matdes.2010.04.036
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发表时间：
2010-10
影响因子：
8.4
通讯作者：
M. Omar;H. Akil;Z. Ahmad;A. Mazuki;T. Yokoyama
中科院分区：
文献类型：
--
作者：
M. Omar;H. Akil;Z. Ahmad;A. Mazuki;T. Yokoyama
利用压缩分离式霍普金森压杆技术对黄麻、红麻纤维增强复合材料在不同应变率下的动态力学性能进行了研究。给出了两种拉挤天然纤维增强复合材料在近1400s−1应变率下的应力-应变曲线，并与静态测定的应力-应变曲线(1.0×10−-3s−1)进行了比较。结果表明，应变速率对两种拉挤天然纤维复合材料的动态压缩性能均有影响。在研究的应变率范围内，与低应变率相比，高应变率下的动态压缩模数和2.5%的流动应力被记录下来。在动态载荷下，黄麻纤维增强复合材料的压缩弹性系数、2.5%流动应力和压缩强度的动态响应值均高于红麻纤维增强复合材料。此外，与黄麻纤维增强复合材料相比，红麻纤维增强复合材料在所有测试应变率下都受到更严重的破坏。
The paper presents results on dynamic mechanical properties of jute, and kenaf fibre reinforced composites at various strain rates using compression Split Hopkinson Pressure Bar technique. The stress–strain curves for both pultruded natural fibre reinforced composites at strain rates of nearly 1400s−1are illustrated and then compared with statically determines stress–strain curve (1.0×10−3s−1). Results show that the strain rate does affect the value of dynamic compressive properties of both pultruded natural fibre composites. Higher dynamic compression modulus and 2.5% flow stress were recorded for higher strain rates as compared to lower strain rate over the range of strain rates investigated. Under dynamic loading, jute fibre reinforced composites recorded the highest value of dynamic response in terms of compression modulus, 2.5% flow stress and compressive strength than that of kenaf fibre reinforced composites. In addition, kenaf fibre reinforced composites is more severely damaged as compared to jute fibre reinforced composites for all tested strain rate.