Dynamic mechanical properties of whisker/PA66 composites at high strain rates

Abstract 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 40 wt % 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.

[1]  U. Vaidya,et al.  Studies on the Influence of Through-the-Thickness Reinforcement on Low-Velocity and High Strain Rate Response of Woven S2-Glass/Vinyl Ester Composite , 2001 .

[2]  S. Tjong,et al.  Microstructural and mechanical characteristics of compatibilized polypropylene hybrid composites containing potassium titanate whisker and liquid crystalline copolyester , 1999 .

[3]  S. W. Park,et al.  Time-Resolved Impact Response and Damage of Fiber-Reinforced Composite Laminates , 2000 .

[4]  U. Vaidya,et al.  High Strain Rate Impact Response of Graphite/Epoxy Composites with Polycarbonate Facing , 2003 .

[5]  T. Weerasooriya,et al.  Quasi-Static and Dynamic Compressive Behaviors of a S-2 Glass/SC15 Composite , 2003 .

[6]  Yang Feng,et al.  Interfacial interaction and mechanical properties of nylon 6-potassium titanate composites prepared by in-situ polymerization , 1997 .

[7]  S. Tjong,et al.  Properties and morphology of polyamide 6 hybrid composites containing potassium titanate whisker and liquid crystalline copolyester , 1999 .

[8]  B. K. Fink,et al.  High Strain-Rate Behavior of Plain-Weave S-2 Glass/Vinyl Ester Composites , 2001 .

[9]  Weinong W Chen,et al.  Pulse shaping techniques for testing brittle materials with a split hopkinson pressure bar , 2002 .

[10]  M. J. Forrestal,et al.  Dynamic small strain measurements of a metal specimen with a split Hopkinson pressure bar , 2003 .

[11]  Jingshen Wu,et al.  The dielectric and mechanical properties of a potassium-titanate-whisker-reinforced PP/PA blend , 2000 .

[12]  William L. Fourney,et al.  A polymeric split Hopkinson pressure bar instrumented with velocity gages , 2003 .

[13]  M. Osman,et al.  INFLUENCE OF EXCESSIVE FILLER COATING ON THE TENSILE PROPERTIES OF LDPE-CALCIUM CARBONATE COMPOSITES , 2004 .

[14]  S. Tjong,et al.  Thermal stability of polycarbonate composites reinforced with potassium titanate whiskers: effect of coupling agent addition , 1999 .

[15]  S. Tjong,et al.  Mechanical and thermal properties of polycarbonate composites reinforced with potassium titanate whiskers , 1999 .

[16]  S. Tjong,et al.  Performance of potassium titanate whisker reinforced polyamide-6 composites , 1998 .

[17]  Xiaohua Lu,et al.  Elastic interlayer toughening of potassium titanate whiskers–nylon66 composites and their fractal research , 2001 .

[18]  J. Crandall,et al.  Wave Dispersion and Attenuation in Viscoelastic Split Hopkinson Pressure Bar , 1998 .