The load–displacement curves of an aluminum alloy and tantalum were determined using a hat-type specimen in the compression test. Based on the results of finite element analysis, the employed geometry of the hat-type specimen was found to yield a load–displacement curve that is nearly independent of the friction between the specimen and the platen. The flow stress–strain curves of the alloy and tantalum were modeled using the Ludwik and Voce constitutive laws, respectively; furthermore, simulation of the compression event of the hat-type specimen was performed by assuming appropriate constitutive parameters. The constitutive parameters were varied via an optimization function built in matlab until the simulated load–displacement curves reasonably fit the experimental curve. The optimized constitutive parameters obtained in this way were then used to construct friction-free flow stress–strain curves of the two materials.
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March 2019
Research-Article
Determination of the Flow Stress–Strain Curves of Aluminum Alloy and Tantalum Using the Compressive Load–Displacement Curves of a Hat-Type Specimen
Jae-Ha Lee,
Jae-Ha Lee
Mechanics of Materials and Design Laboratory,
Department of Materials Engineering,
Gangneung-Wonju National University,
Gangwon-do, Gangneung 25457, South Korea
Department of Materials Engineering,
Gangneung-Wonju National University,
Gangwon-do, Gangneung 25457, South Korea
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Hyunho Shin,
Hyunho Shin
Mechanics of Materials and Design Laboratory,
Department of Materials Engineering,
Gangneung-Wonju National University,
e-mail: hshin@gwnu.ac.kr
Department of Materials Engineering,
Gangneung-Wonju National University,
Gangwon-do
, Gangneung 25457, South Koreae-mail: hshin@gwnu.ac.kr
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Jong-Bong Kim,
Jong-Bong Kim
Computational Mechanics and
Design Laboratory,
Department of Mechanical and
Automotive Engineering,
Seoul National University of
Science and Technology,
Nowon-gu, Seoul 01811, South Korea
e-mail: jbkim@seoultech.ac.kr
Design Laboratory,
Department of Mechanical and
Automotive Engineering,
Seoul National University of
Science and Technology,
Nowon-gu, Seoul 01811, South Korea
e-mail: jbkim@seoultech.ac.kr
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Ju-Young Kim,
Ju-Young Kim
Poongsan Defense R&D Institute,
Yuseong-gu, Daejeon 34027, South Korea
Yuseong-gu, Daejeon 34027, South Korea
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Sung-Taek Park,
Sung-Taek Park
Poongsan Defense R&D Institute,
Yuseong-gu, Daejeon 34027, South Korea
Yuseong-gu, Daejeon 34027, South Korea
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Gwang-Lyeon Kim,
Gwang-Lyeon Kim
Poongsan Defense R&D Institute,
Yuseong-gu, Daejeon 34027, South Korea
Yuseong-gu, Daejeon 34027, South Korea
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Kyeong-Won Oh
Kyeong-Won Oh
Defense Industry Technology Center,
Yongsan-gu, Seoul 04353, South Korea
Yongsan-gu, Seoul 04353, South Korea
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Jae-Ha Lee
Mechanics of Materials and Design Laboratory,
Department of Materials Engineering,
Gangneung-Wonju National University,
Gangwon-do, Gangneung 25457, South Korea
Department of Materials Engineering,
Gangneung-Wonju National University,
Gangwon-do, Gangneung 25457, South Korea
Hyunho Shin
Mechanics of Materials and Design Laboratory,
Department of Materials Engineering,
Gangneung-Wonju National University,
e-mail: hshin@gwnu.ac.kr
Department of Materials Engineering,
Gangneung-Wonju National University,
Gangwon-do
, Gangneung 25457, South Koreae-mail: hshin@gwnu.ac.kr
Jong-Bong Kim
Computational Mechanics and
Design Laboratory,
Department of Mechanical and
Automotive Engineering,
Seoul National University of
Science and Technology,
Nowon-gu, Seoul 01811, South Korea
e-mail: jbkim@seoultech.ac.kr
Design Laboratory,
Department of Mechanical and
Automotive Engineering,
Seoul National University of
Science and Technology,
Nowon-gu, Seoul 01811, South Korea
e-mail: jbkim@seoultech.ac.kr
Ju-Young Kim
Poongsan Defense R&D Institute,
Yuseong-gu, Daejeon 34027, South Korea
Yuseong-gu, Daejeon 34027, South Korea
Sung-Taek Park
Poongsan Defense R&D Institute,
Yuseong-gu, Daejeon 34027, South Korea
Yuseong-gu, Daejeon 34027, South Korea
Gwang-Lyeon Kim
Poongsan Defense R&D Institute,
Yuseong-gu, Daejeon 34027, South Korea
Yuseong-gu, Daejeon 34027, South Korea
Kyeong-Won Oh
Defense Industry Technology Center,
Yongsan-gu, Seoul 04353, South Korea
Yongsan-gu, Seoul 04353, South Korea
1Corresponding authors.
Contributed by the Applied Mechanics Division of ASME for publication in the JOURNAL OF APPLIED MECHANICS. Manuscript received September 15, 2018; final manuscript received November 22, 2018; published online January 22, 2019. Assoc. Editor: Junlan Wang.
J. Appl. Mech. Mar 2019, 86(3): 031012 (6 pages)
Published Online: January 22, 2019
Article history
Received:
September 15, 2018
Revised:
November 22, 2018
Citation
Lee, J., Shin, H., Kim, J., Kim, J., Park, S., Kim, G., and Oh, K. (January 22, 2019). "Determination of the Flow Stress–Strain Curves of Aluminum Alloy and Tantalum Using the Compressive Load–Displacement Curves of a Hat-Type Specimen." ASME. J. Appl. Mech. March 2019; 86(3): 031012. https://doi.org/10.1115/1.4042138
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