摘要
基于数字图像相关法和红外测温技术,通过霍普金森压杆试验,分析TC4钛合金在绝热剪切过程中的热力学响应特性,为绝热剪切试验研究提供参考。结果表明,剪切区的宽度在加载过程中不断变化,导致直接计算剪切应变时可能出现误差。通过数字图像相关法分析应变分布,发现剪切区在动态加载初期较宽,随后逐渐减小。红外测温结果表明,明显的温度升高集中在应力崩塌阶段,最高温度约为750 K。
Based on the digital image correlation method and infrared temperature measurement technology,the thermodynamic response characteristic of TC4 titanium alloy in the process of adiabatic shear was analyzed by the Hopkinson pressure bar test,which provided a reference for the experimental study of adiabatic shear.The result shows that the width of the shear zone is constantly changing during the loading process,which leads to possible error in the direct calculation of the shear strain.The strain distribution was analyzed by the digital image correlation method,and it is found that the shear region is wide at the beginning of dynamic loading and then gradually decreases.The infrared temperature measurement result shows that the obvious temperature increase is concentrated in the stress collapse stage,and the maximum temperature is about 750 K.
出处
《机械制造》
2024年第12期42-46,81,共6页
Machinery
基金
国家自然科学基金资助项目(编号:12372362)。
关键词
钛合金
绝热剪切
试验
数字图像相关
红外测温
Titanium Alloy
Adiabatic Shear
Test
DIC
Infrared Temperature Measurement
