D
Dongil Kwon
Researcher at Seoul National University
Publications - 173
Citations - 3523
Dongil Kwon is an academic researcher from Seoul National University. The author has contributed to research in topics: Indentation & Residual stress. The author has an hindex of 31, co-authored 169 publications receiving 3154 citations.
Papers
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Journal ArticleDOI
Derivation of plastic stress–strain relationship from ball indentations: Examination of strain definition and pileup effect
Jeong-Hoon Ahn,Dongil Kwon +1 more
TL;DR: In this article, the authors derived the true stress-true strain relationship of steels with different work-hardening exponents (0.1−0.3) from ball indentations.
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Estimation of biaxial surface stress by instrumented indentation with sharp indenters
Yun-Hee Lee,Dongil Kwon +1 more
TL;DR: In this paper, the influence of non-equi-biaxial surface stress on the shape of indentation load versus depth curve was studied experimentally by instrumented sharp indentation tests on artificially strained samples of API X65 steel.
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Measurement of residual-stress effect by nanoindentation on elastically strained (100) W
Yun-Hee Lee,Dongil Kwon +1 more
TL;DR: In this article, the effects of elastic in-plane stress on surface-normal contact deformation were investigated by nanoindentation experiments on artificially strained (1.0) tungsten single crystal.
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Influence of surface-roughness on indentation size effect
TL;DR: In this paper, a rough surface indentation size effect (ISE) model was developed to estimate the work expended to flatten the rough surface and to deform the flattened surface, and the applicability of the model is discussed in terms of a critical contact depth for the surface roughness effect on ISE.
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An instrumented indentation technique for estimating fracture toughness of ductile materials: A critical indentation energy model based on continuum damage mechanics
TL;DR: In this article, a new instrumented indentation technique for estimating fracture toughness of ductile materials is proposed based on two key concepts: the indentation energy to the characteristic fracture initiation point during indentation may be closely related to a material's resistance to fracture, i.e., fracture toughness.