Hopkinson pressure bar experiments of oxygen free copper in high speed machining process were carried out with temperature ranging from 20℃ to 900℃ and strain rate ranging from 1.0×103 to 1.5×104s-1. The true stress-true strain curves obtained from experiments showed that the mechanical property of oxygen free copper showed obvious strain rate and temperature sensitivity. The flow stress increased significantly with the increase of strain rate and decreased with the increase of deformed temperature. The empirical Johnson-Cook constitutive model had a large error in describing the dynamic mechanical property. Based on the analysis of dynamic mechanical property, a modified Johnson-Cook constitutive model was proposed. It can predicte experimental results well, and then can be used to simulate dynamic mechanical property of oxygen free copper in high speed machining process.
YU Jianchao,LIN Youxi
. Oxygen Free Copper Dynamic Mechanical Property in
High Speed Machining Process[J]. Journal of Shanghai Jiaotong University, 2018
, 52(5)
: 587
-592
.
DOI: 10.16183/j.cnki.jsjtu.2018.05.013
[1]郭东明, 孙玉文, 贾振元. 高性能精密制造方法及其研究进展[J]. 机械工程学报, 2014, 50(11): 119-134.
GUO Dongming, SUN Yuwen, JIA Zhenyuan. Methods and research progress of high performance manufacturing[J]. Journal of Mechanical Engineering, 2014, 50(11): 119-134.
[2]王兵, 刘战强. 材料动态性能对高速切削切屑形成的影响规律[J]. 中国科学: 技术科学, 2016, 46(1): 1-19.
WANG Bing, LIU Zhanqiang. Effect of material dynamic properties on the chip formation mechanism during high speed machining[J].Scientia Sinica Technologica, 2016, 46(1): 1-19.
[3]HAO Z P, JI F F, FAN Y, et al. Flow characteristics and constitutive equations of flow stress in high speed cutting alloy 718[J]. Journal of Alloys and Compounds, 2017, 728(25): 854-862.
[4]BRINKSMEIER E, PREUSS W, RIEMER O, et al. Cutting forces, tool wear and surface finish in high speed diamond machining[J]. Precision Engineering, 2017, 49: 293-304.
[5]BINDER M, KLOCKE F, DOEBBELER B. An advanced numerical approach on tool wear simulation for tool and process design in metal cutting[J]. Simulation Modelling Practice and Theory, 2017, 70: 65-82.
[6]ZHOU T F, WU J J, CHE J T, et al. Dynamic shear characteristics of titanium alloy Ti-6Al-4V at large strain rates by the split Hopkinson pressure bar test[J]. International Journal of Impact Engineering, 2017, 109: 167-177.
[7]TIAMIYU A A, BASU R, ODESHI A G, et al. Plastic deformation in relation to microstructure and texture evolution in AA 2017-T451 and AA 2624-T351 aluminum alloys under dynamic impact loading[J]. Materials Science and Engineering A, 2015, 636: 379-388.
[8]毛萍莉, 于金程, 刘正, 等. 挤压态Mg-Gd-Y镁合金动态压缩力学性能与失效行为[J]. 中国有色金属学报, 2013, 23(4): 889-897.
MAO Pingli, YU Jincheng, LIU Zheng, et al. Dynamic mechanical property and failure behavior of extruded Mg-Gd-Y alloy under high strain rate compression[J]. The Chinese Journal of Nonferrous Metals, 2013, 23(4): 889-897.
[9]BOLDYREV I S, SHCHUROV I A. FEM thermo-mechanical simulation of the free orthogonal cutting and temperature distribution in tool and workpiece[J]. Procedia Engineering, 2017, 206: 1133-1136.
[10]王礼立, 王永刚. 应力波在用SHPB研究材料动态本构特性中的重要作用[J]. 爆炸与冲击, 2005, 25(1): 17-25.
WANG Lili, WANG Yonggang. The important role of stress waves in the study on dynamic constitutive behavior of materials by SHPB[J]. Explosion and Shock Waves, 2005, 25(1): 17-25.
[11]LI Y, GUO Y, HU H, et al. A critical assessment of high-temperature dynamic mechanical testing of metals[J]. International Journal of Impact Engineering, 2009, 36(2): 177-184.
[12]赵征志, 佟婷婷, 赵爱民, 等. 1300MPa级0.14C-2.72Mn-1.3Si钢的显微组织和力学性能及加工硬化行为[J]. 金属学报, 2014, 50(10): 1153-1162.
ZHAO Zhengzhi, TONG Tingting, ZHAO Aimin, et al. Microstructure, mechanical properties and work hardening behavior of 1 300 MPa grade 0.14C-2.72Mn-1.3Si steel[J]. Acta Metallurgica Sinica, 2014, 50(10): 1153-1162.
[13]STRICKER M, WEYGAND D. Dislocation multiplication mechanisms—Glissile junctions and their role on the plastic deformation at the microscale[J]. Acta Materialia, 2015, 99(15): 130-139.
[14]JOHNSON G R, COOK W H. A constitutive model and data for metal subjected to large strain, high strain rates and high temperatures[C]∥Processing of the Seventh International Symposium on Ballistics, Hague, Netherlands: [s.n.], 1983: 541-547.
[15]俞建超, 姜峰, 融亦鸣. AISI D2钢力学性能尺寸效应实验研究[J]. 材料科学与工艺, 2012, 20(3): 83-88.
YU Jianchao, JIANG Feng, RONG Yiming. Experimental research on mechanical property size effects of AISI D2 steel[J]. Materials Science and Technology, 2012, 20(3): 83-88.
[16]LIN Y C, CHEN X M. A critical review of experimental results and constitutive descriptions for metals and alloys in hot working[J]. Materials and Design, 2011, 32(4): 1733-1759.