付应乾,董新龙.工业纯钛动态压缩特性及破坏的实验研究[J].稀有金属材料与工程,2016,45(1):102~106.[Fu Yingqian,Dong Xinlong.Experimental Study on Mechanical Properties and Failure characteristic of a Commercially Pure Titanium under Dynamic Compression[J].Rare Metal Materials and Engineering,2016,45(1):102~106.]
工业纯钛动态压缩特性及破坏的实验研究
投稿时间:2014-01-30  修订日期:2014-03-11
中文关键词:  固体力学  Ta2钛金属  动态压缩  绝热剪切
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目);国家教育部博士点基金
中文摘要:
      本文利用分离式霍普金森压杆对工业纯TA2进行了动态压缩及绝热剪切破坏进行了实验研究,得到不同应变率和温度下的宏观应力-应变关系曲线。通过对压缩本构特性及微观金相破坏的比较分析,讨论了加载率、表观压缩本构特性对绝热剪切形成的影响,结果显示:Ta2试样动态压缩呈现绝热剪切破坏特征,绝热剪切带在空间呈对称的双锥形状;随加载率提高,绝热剪切带形成的临界应变越小;分析表明动态压缩实验法得到关于绝热剪切起始、发展过程的本构软化信息。
Experimental Study on Mechanical Properties and Failure characteristic of a Commercially Pure Titanium under Dynamic Compression
英文关键词:solid mechanics  pure titanium ta2  SHPB  adiabatic shear bands
英文摘要:
      Pure titanium TA2 alloy was tested by Split Hopkinson Pressure Bar (SHPB) under uniaxial dynamic compression conditions with different strain rates and room temperatures. Adiabatic shear bands were found in the specimens by metallographic after compression tests. As a result, we found strain and strain rate were so important for the initiation of shear bands. A critical strain must be arrived when the shear bands occur, and the larger strain rate, the smaller critical strain.
作者单位E-mail
付应乾 宁波大学 imech2012@gmail.com 
董新龙 宁波大学  
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