Constitutive model is the most commonly used method to describe the material deformation behavior during machining process. This paper aims to investigate the material dynamic deformation during high speed machining of 7050-T7451 aluminum alloy with the aid of split Hopkinson pressure bar (SHPB) system and finite element (FE) analysis. First, the quasi static and dynamic compression behaviors of 7050-T7451 aluminum alloy are tested at different loading conditions with a wide range of strain rates (0.001 s, 4000 s, 6000 s, 8000 s, and 12,000 s) and temperatures (room temperature, 100 °C, 200 °C, 300 °C, and 400 °C). The influences of temperature on strain and strain rate hardening effects are revealed based on the flow stress behavior and microstructural alteration of tested specimens. Second, a modified Johnson–Cook (JCM) constitutive model is proposed considering the influence of temperature on strain and strain rate hardening. The prediction accuracies of Johnson–Cook (JC) and JCM constitutive models are compared, which indicates that the predicted flow stresses of JCM model agree better with the experimental results. Then the established JC and JCM models are embedded into FE analysis of orthogonal cutting for 7050-T7451 aluminum alloy. The reliabilities of two material models are evaluated with chip morphology and cutting force as assessment criteria. Finally, the material dynamic deformation behavior during high speed machining and compression test is compared. The research results can help to reveal the dynamic properties of 7050-T7451 aluminum alloy and provide mechanical foundation for FE analysis of high speed machining.
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January 2019
Research-Article
A Modified Johnson–Cook Constitutive Model and Its Application to High Speed Machining of 7050-T7451 Aluminum Alloy
Bing Wang,
Bing Wang
Mem ASME
School of Mechanical Engineering,
Shandong University,
Jinan 250061, Shandong, China;
School of Mechanical Engineering,
Shandong University,
Jinan 250061, Shandong, China;
School of Materials Science and Engineering,
Shandong University,
Jinan 250061, Shandong, China;
Shandong University,
Jinan 250061, Shandong, China;
Key Laboratory of High Efficiency and
Clean Mechanical Manufacture of MOE/Key
National Demonstration Center for Experimental
Mechanical Engineering Education,
Jinan 250061, Shandong, China
e-mail: sduwangbing@gmail.com
Clean Mechanical Manufacture of MOE/Key
National Demonstration Center for Experimental
Mechanical Engineering Education,
Jinan 250061, Shandong, China
e-mail: sduwangbing@gmail.com
Search for other works by this author on:
Zhanqiang Liu,
Zhanqiang Liu
Mem ASME
School of Mechanical Engineering,
Shandong University,
Jinan 250061, Shandong, China;
School of Mechanical Engineering,
Shandong University,
Jinan 250061, Shandong, China;
Key Laboratory of High Efficiency and Clean
Mechanical Manufacture of MOE/Key National
Demonstration Center for Experimental
Mechanical Engineering Education,
Jinan 250061, Shandong, China
e-mail: melius@sdu.edu.cn
Mechanical Manufacture of MOE/Key National
Demonstration Center for Experimental
Mechanical Engineering Education,
Jinan 250061, Shandong, China
e-mail: melius@sdu.edu.cn
Search for other works by this author on:
Qinghua Song,
Qinghua Song
School of Mechanical Engineering,
Shandong University,
Jinan 250061, Shandong, China
e-mail: ssinghua@sdu.edu.cn
Shandong University,
Jinan 250061, Shandong, China
e-mail: ssinghua@sdu.edu.cn
Search for other works by this author on:
Yi Wan,
Yi Wan
School of Mechanical Engineering,
Shandong University,
Jinan 250061, Shandong, China
e-mail: wanyi@sdu.edu.cn
Shandong University,
Jinan 250061, Shandong, China
e-mail: wanyi@sdu.edu.cn
Search for other works by this author on:
Xiaoping Ren
Xiaoping Ren
School of Mechanical Engineering,
Shandong University,
Jinan 250061, Shandong, China
e-mail: renxiaoping@sdu.edu.cn
Shandong University,
Jinan 250061, Shandong, China
e-mail: renxiaoping@sdu.edu.cn
Search for other works by this author on:
Bing Wang
Mem ASME
School of Mechanical Engineering,
Shandong University,
Jinan 250061, Shandong, China;
School of Mechanical Engineering,
Shandong University,
Jinan 250061, Shandong, China;
School of Materials Science and Engineering,
Shandong University,
Jinan 250061, Shandong, China;
Shandong University,
Jinan 250061, Shandong, China;
Key Laboratory of High Efficiency and
Clean Mechanical Manufacture of MOE/Key
National Demonstration Center for Experimental
Mechanical Engineering Education,
Jinan 250061, Shandong, China
e-mail: sduwangbing@gmail.com
Clean Mechanical Manufacture of MOE/Key
National Demonstration Center for Experimental
Mechanical Engineering Education,
Jinan 250061, Shandong, China
e-mail: sduwangbing@gmail.com
Zhanqiang Liu
Mem ASME
School of Mechanical Engineering,
Shandong University,
Jinan 250061, Shandong, China;
School of Mechanical Engineering,
Shandong University,
Jinan 250061, Shandong, China;
Key Laboratory of High Efficiency and Clean
Mechanical Manufacture of MOE/Key National
Demonstration Center for Experimental
Mechanical Engineering Education,
Jinan 250061, Shandong, China
e-mail: melius@sdu.edu.cn
Mechanical Manufacture of MOE/Key National
Demonstration Center for Experimental
Mechanical Engineering Education,
Jinan 250061, Shandong, China
e-mail: melius@sdu.edu.cn
Qinghua Song
School of Mechanical Engineering,
Shandong University,
Jinan 250061, Shandong, China
e-mail: ssinghua@sdu.edu.cn
Shandong University,
Jinan 250061, Shandong, China
e-mail: ssinghua@sdu.edu.cn
Yi Wan
School of Mechanical Engineering,
Shandong University,
Jinan 250061, Shandong, China
e-mail: wanyi@sdu.edu.cn
Shandong University,
Jinan 250061, Shandong, China
e-mail: wanyi@sdu.edu.cn
Xiaoping Ren
School of Mechanical Engineering,
Shandong University,
Jinan 250061, Shandong, China
e-mail: renxiaoping@sdu.edu.cn
Shandong University,
Jinan 250061, Shandong, China
e-mail: renxiaoping@sdu.edu.cn
1Corresponding author.
Manuscript received August 1, 2018; final manuscript received October 29, 2018; published online November 26, 2018. Assoc. Editor: Tony Schmitz.
J. Manuf. Sci. Eng. Jan 2019, 141(1): 011012 (15 pages)
Published Online: November 26, 2018
Article history
Received:
August 1, 2018
Revised:
October 29, 2018
Citation
Wang, B., Liu, Z., Song, Q., Wan, Y., and Ren, X. (November 26, 2018). "A Modified Johnson–Cook Constitutive Model and Its Application to High Speed Machining of 7050-T7451 Aluminum Alloy." ASME. J. Manuf. Sci. Eng. January 2019; 141(1): 011012. https://doi.org/10.1115/1.4041915
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