帽型试样绝热剪切演化实验及数值模拟
PDF下载 (13347)宋鹏飞 1,董新龙 1*,周刚毅 1,付应乾 1,2.帽型试样绝热剪切演化实验及数值模拟[J].宁波大学学报(理工版),2018,31(2):50-54.DOI:
SONG Peng-fei 1,DONG Xin-long 1*,ZHOU Gang-yi 1,FU Ying-qian 1,2.Experimental and numerical analysis of adiabatic shear evolution in hat-shaped specimen[J].Journal of Ningbo University(Natural Science & Engineering Edition),2018,31(2):50-54.DOI:
| Title: | Experimental and numerical analysis of adiabatic shear evolution in hat-shaped specimen |
| 作者: | 宋鹏飞 1, 董新龙 1*, 周刚毅 1, 付应乾 1, 2 |
| Author(s): | SONG Peng-fei 1, DONG Xin-long 1*, ZHOU Gang-yi 1, FU Ying-qian 1, 2 |
| 关键词: | 帽型剪切试样; 绝热剪切; 图像相关法; 有限元 |
| Keywords: | hat-shaped shear specimen; adiabatic shear; DIC; finite element |
| 分类号: | O346 |
| 文献标识码: | A |
| 摘要: | 采用Hopkinson压杆对TA2钛合金扁平帽形试样开展“冻结”实验, 结合微观金相分析, 研究绝热剪切局域化演化过程及其力学响应, 采用剪切损伤软化模型描述绝热剪切带软化特性. 通过有限元模拟得出的应变演化和破坏图像, 以及通过数字图像相关法得到的剪切区平均应变场演化过程, 与“冻结”试样观测结果符合较好. |
| Abstract: | Adiabatic shear is one of the important failure mechanism of ductile metal materials under the high strain rate deformation. In this paper, the hat-shaped shear test is carried out experimentally for TA2 titanium alloy using the split Hopkinson pressure bars. The adiabatic shear band is studied by microscopic metallurgical observation of “freezing” sample. Combined with the “freezing” sample, the evolution of adiabatic shear band and its mechanical response is studied. The shear damage model is adopted to describe the softening behavior of adiabatic shear band failure. The strain evolution and failure images using the finite element method are in agreement with the results obtained from digital image correlation method, and the metallographic observation in shear zone of “frozen specimens”. |
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| 备注/Memo: | 收稿日期: 2017－07－18. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 国家自然科学基金（U1230122, 11672143）. 第一作者: 宋鹏飞（1991－）, 男, 山东淄博人, 在读硕士研究生, 主要研究方向: 材料动态冲击. E-mail: 1225959442@qq.com *通信作者: 董新龙（1964－）, 男, 浙江宁波人, 博士/教授, 主要研究方向: 材料动态力学行为. E-mail: dongxinlong@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
