Dynamic mechanical properties of whisker/PA66 composites at high strain rates
Dynamic mechanical properties of whisker/PA66 composites at high strain rates
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DOI：
10.1016/j.polymer.2005.02.042
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发表时间：
2005-04
期刊：
影响因子：
4.6
通讯作者：
X. Hao;G. Gai;F. Lu;Xijin Zhao;Yihe Zhang;Ji-Ping Liu;Yang Yufen;Dayong Gui;C. Nan
中科院分区：
文献类型：
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作者：
X. Hao;G. Gai;F. Lu;Xijin Zhao;Yihe Zhang;Ji-Ping Liu;Yang Yufen;Dayong Gui;C. Nan
采用双螺杆挤出机制备了经硅烷偶联剂处理的钛酸钾晶须（TKW）增强尼龙66。研究了其准静态和动态力学性能。在PA 66中加入40wt%的TKW可改善PA 66的各项性能。在分离式霍普金森压杆（SHPB）上进行了TKW/PA 66复合材料的高速动态实验。SHPB实验中的加载脉冲被精确控制，以确保复合材料试样在动态压缩过程中在动态平衡应力下以几乎恒定的应变速率变形。得到了高应变率下的本构曲线和本构方程。TKW/PA 66复合材料的参考模量提高了20-100%，压缩强度提高了20%。
PA66 reinforced with potassium titanate whisker (TKW) treated with silane coupling agent were prepared using a twin-screw extruder. The quasi-static and dynamic mechanical properties were investigated. Addition of 40wt % TKW to PA66 improves all the investigated properties. The high-speed dynamic tests with TKW/PA66 were carried on split Hopkinson pressure bar (SHPB). The loading pulses in SHPB experiments were precisely controlled to ensure that the composite specimens deformed at a nearly constant strain rate under dynamically equilibrated stress during dynamic compression. The constitutive curves and equations at high strain rates have been obtained. TKW/PA66 composites show 20–100% increase on reference modulus and 20% increase on compression strength.