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Kim, Ju-Young
Robust Multifunctional Materials Lab
Research Interests
  • Flexible / stretchable devices, nano-mechanics, nanoporous metal, materials reliability

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Extended expanding cavity model for measurement of flow properties using instrumented spherical indentation

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Title
Extended expanding cavity model for measurement of flow properties using instrumented spherical indentation
Author
Kang, Seung-KyunKim, Young-CheonKim, Kyg-HwanKim, Ju-Young
Issue Date
2013-10
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
INTERNATIONAL JOURNAL OF PLASTICITY, v.49, pp.1 - 15
Abstract
We propose an extended expanding cavity model (ECM) in instrumented spherical indentation to evaluate flow properties measured in uniaxial mechanical testing. We describe the mean pressure of the projected surface from radial stress at the hemispherical core boundary with a scaling factor for strain-hardening metals. Plastic constraint factors determined by the strain-hardening exponent, yield strain and scaling factor successfully illustrate flow stress-strain points in uniaxial tension tests. We suggest a novel way to determine the strain-hardening exponent from the ratio of indentation loading slope, and a modified Meyer relation to measure yield strengths.
URI
https://scholarworks.unist.ac.kr/handle/201301/3259
DOI
10.1016/j.ijplas.2013.02.014
ISSN
0749-6419
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MSE_Journal Papers
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