【作者】 佟景伟； 高丛峰； 李鸿琦； 王世斌； C.Albertini； V.Pizzinato；

【Author】 Tong Jingwei Gao Congfeng Li Hongqi Wang Shibin (Department of Mechanics,Tianjin University,Tianjing,300072) C.Albertini V.Pizzinato (Commission of the European Communities,J.R.C.,Ispra Establishment,Italy)

【机构】 天津大学力学系； Commission of the European Communities,J.R.C.,Ispra Establishment,Italy；

【摘要】 利用分离式扭-拉复合加载Hopkinson杆装置,在20℃和500℃下研究了温度对高应变率扭-拉复合加载下铁基形状记忆合金本构的影响。试验结果表明:该材料在高应变率扭-拉复合加载下的名义剪切屈服强度、剪切强度极限和名义拉伸屈服极限、拉伸强度极限均随温度的升高而降低。拉伸和扭转之间具有相互藕合作用。更多还原

【Abstract】 With a split Hopkinson torsion-tension combination bar apparatus,the effect of temperature on the constitutive relations of Fe-base shape memory alloy under torsion-tension combined high strain-rate is studied at temperatures 20℃and 500℃.The experimental results show that 0.2% yield shear stress,ultimate shear stress and 0.2%yield tensile stress,ultimate tensile stress under torsion-tension combined high strain-rate decrease with increasing temperature.It is also found that there is a coupling between tension and torsion.更多还原