Hee-Jun Ahn
Seoul National University
5 Papers
6 Citations
Hee-Jun Ahn is an academic researcher from Seoul National University. The author has contributed to research in topics: Knoop hardness test & Residual stress. The author has an hindex of 3, co-authored 4 publications.
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Papers
Modeling and experimental verification for non-equibiaxial residual stress evaluated by Knoop indentations
TL;DR: In this paper, a Knoop indentation indenter is used to evaluate surface residual stress using instrumented indentation testing (IIT) using a two-fold symmetry.
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Directionality of residual stress evaluated by instrumented indentation testing using wedge indenter
TL;DR: In this paper, a wedge-indentation-mechanics model based on predetermined conversion factors which are determined by instrumented indentation testing (IITs) for various uniaxial stressed states combining with finite element analysis simulations was developed.
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Fracture Characteristics of Frit Bonding through In-Situ Nano-Indentation Testing
TL;DR: In this paper, the fracture characteristics at the drop impact situation could be estimated by the values at the high strain rate nano-indentation, and the ratio between modulus and hardness on frit matrix showed close relationship with drop impact fracture.
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Thickness of the Deltoid Muscle and Location of the Anterior Branch of the Axillary Nerve and the Posterior Circumflex Humeral Artery for Deltoid Injections
TL;DR: In this article , the authors investigated the thickness of the deltoid muscle and the location of the anterior branch of the axillary nerve (AAN) and posterior circumflex humeral artery (PCHA).
A Study on Utilizing Instrumented Indentation Technique for Evaluating In-field Integrity of Nuclear Structures
TL;DR: In this paper, IIT has been used to evaluate tensile property and residual stress by analyzing stress field occurs under the indenter while IIT is performed Test on welded area, the weak site of nuclear structures have been practiced and confirmed that IIT can be usefully applied to evaluate integrity in industry.
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