| 冲击拉伸下多晶纯钛的绝热温升效应 |
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| 引用本文： | 黄文,黄中伟. 冲击拉伸下多晶纯钛的绝热温升效应[J]. 深圳大学学报(理工版), 2010, 27(2) |
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| 作者姓名： | 黄文 黄中伟 |
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| 作者单位： | 深圳大学土木工程学院,深圳,518060 |
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| 基金项目： | 国家自然科学基金，深圳大学重点实验室开放基金 |
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| 摘 要： | 在冲击拉伸实验装置的入射杆和透射杆上加入余波吸收器,消除反射余波对试件的二次加载,实现冲击条件下的动态拉伸加卸载实验,发展了动态拉伸复元技术,获得了纯钛在动态拉伸条件下的等温应力应变曲线.通过Johnson-Cook模型描述温度的软化效应,对比等温应力应变曲线和绝热曲线,确定纯钛的绝热温升效应.结果表明,动态拉伸条件下耗散功向热量的转化比率约为60%.
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| 关 键 词： | 航空材料 钛 应力波 冲击拉伸 动态拉伸复元技术 绝热温升 |
The adiabatic temperature rise in a poly-crystalline titanium under dynamic tensile load |
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| HUANG Wen,HUANG Zhong-wei. The adiabatic temperature rise in a poly-crystalline titanium under dynamic tensile load[J]. Journal of Shenzhen University(Science &engineering), 2010, 27(2) |
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| Authors: | HUANG Wen HUANG Zhong-wei |
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| Affiliation: | HUANG Wen and HUANG Zhong-wei College of Civil Engineering Shenzhen University Shenzhen 518060 P.R.China |
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| Abstract: | Wave absorbers were added to a dynamic tensile apparataus to eliminate the reflected wave in the input and output bars in a dynamic tensile experiment,so that the dynamic load-unload technique was realized.Based on this technique,the dynamic tensile recovery technique was developed,and the dynamic isothermal stress-strain curve of titanium was obtained.Using the John-Cook model to describe the thermal softening effect,the effect of adiabatic temperature rise was characterized by comparing the isothermal stress-strain curve with the adiabatic one. About 60% of plastic work was converted to heat during dynamic plastic deformation. |
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| Keywords: | aeronautical material titanium stress wave dynamic tension dynamic tensile recovery technique adiabatic temperature rise |
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