Search Results - "Choi, Youngsik"

Influence of feed rate on surface integrity and fatigue performance of machined surfaces by Choi, Youngsik

“…•This paper studies the influence of feed rate on the fatigue performance.•A higher feed rate induces more compressive residual stresses.•A higher feed rate…”
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A study on the effects of machining-induced residual stress on rolling contact fatigue by Choi, Youngsik

“…This study investigates the effects of machining-induced residual stress on rolling contact fatigue of hard machined components. The rolling contact fatigue…”
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A study on the plasticity and fracture of the AISI 4340 steel alloy under different loading conditions and considering heat-treatment effects by Ghazali, Sami, Algarni, Mohammed, Bai, Yuanli, Choi, Youngsik

“…Comprehensive numerical and experimental studies were performed to investigate the plasticity and ductile fracture behaviors of the AISI 4340 steel alloy under…”
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Effects of altering surface integrity by electrolytic etching on fatigue performance in rolling contact by Choi, Youngsik

“…•A methodology for altering surface integrity by electrolytic etching is presented.•The effects of electrolytic etching on the fatigue parameters vary with the…”
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A Comparative Study of Residual Stress Distribution Induced by Hard Machining Versus Grinding by Choi, Youngsik

“…This study investigates the residual stress distribution induced by hard machining and grinding and compares its impact on fatigue parameters. The residual…”
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Influence of Projectile Velocity on Penetration into a Steel Plate by Cheon, Jun-Min, Choi, Youngsik

“…The effect of various impact conditions on the behavior of projectiles should be explored to determine the structural damage resulting from a high-velocity…”
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Scanning tunneling microscopy study on phase behavior of self-assembled monolayers formed by coadsorption of octanethiol and octyl thiocyanate on Au(111) by Choi, Youngsik, Seong, Sicheon, Han, Seulki, Son, Young Ji, Mondarte, Evan Angelo Quimada, Tahara, Hiroyuki, Song, Subin, Hayashi, Tomohiro, Noh, Jaegeun

“…•Coadsorption of octanethiol (OT) and octyl thiocyanate (OTC) on Au(111).•Phase behaviors of coadsorbed self-assembled monolayers (SAMs) were examined.•OT SAMs…”
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Protective Effects of Melatonin in High-Fat Diet-Induced Hepatic Steatosis via Decreased Intestinal Lipid Absorption and Hepatic Cholesterol Synthesis by Ku, Hyungjune, Kim, Yeonji, Kim, Alvin Lyle, Lee, Garam, Choi, Youngsik, Kim, Bukyung

“…Background: The preventative effect of melatonin on the development of obesity and the progression of fatty liver under a high-fat diet (HFD) has been well…”
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Momordica charantia (bitter melon) efficacy and safety on glucose metabolism in Korean prediabetes participants: a 12-week, randomized clinical study by Kim, Bukyung, Lee, Hak Sung, Kim, Hye-Jin, Lee, Hyolynn, Lee, In-young, Ock, Soyoung, Kwon, Sukyoung, Kang, Sang-Soo, Choi, Youngsik

“…This study was performed to investigate the effects of bitter melon extract (BME) on glucose metabolism, insulin resistance, and various metabolic parameters…”
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Remote health monitoring services in nursing homes by Kim, Jiwon, Kim, Hyunsoo, Im, Sungil, Park, Youngin, Lee, Hae-Young, Kwon, Sookyung, Choi, Youngsik, Sohn, Linda, Oak, Chulho

“…Aged people are challenged by serious complications from chronic diseases, such as mood disorder, diabetes, heart disease, and infectious diseases, which are…”
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Spall progression life model for rolling contact verified by finish hard machined surfaces by Choi, Youngsik, Liu, C. Richard

“…A methodology for modeling the spall progression life for rolling contact is presented. Spall progression phenomena by crack formation and abrasive wear were…”
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Hepatic steatosis changes after early gastric cancer surgery by Kim, Ki Hyun, Ock, Soyoung, Lee, Dohyung, Kim, Yoonhong, Jo, Jihoon, Seo, Kyungwon, Yoon, Kiyoung, Kwon, Sukyoung, Choi, Youngsik, Kim, Bukyung

“…Background: Nonalcoholic fatty liver disease dramatically improves after bariatric surgery, primarily due to improvements in hepatic insulin sensitivity. Since…”
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Impact evaluation of rolling contact fatigue life models by Choi, Youngsik, Yang, Xiaoping

“…Since the accurate prediction of fatigue life has a significant value, many researchers have attempted to develop a reliable fatigue life model. Recently,…”
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Influence of rake angle on surface integrity and fatigue performance of machined surfaces by Choi, Youngsik

“…•This paper studies the influence of rake angle on the fatigue performance.•A higher rake angle induces more compressive residual stresses.•A lower rake angle…”
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Fast displacement and structural transition of cyclohexanethiol self-assembled monolayers by octanethiols on Au (1 1 1) by Kwon, Seungwook, Choi, Youngsik, Choi, Jungseok, Kang, Hungu, Chung, Hoeil, Noh, Jaegeun

“…Displacement of cyclohexanethiols (CHTs) self-assembled monolayers (SAMs) by octanethiols on Au (1 1 1) (OTs) was examined by scanning tunneling microscopy…”
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Influence of the Shape of Explosive Charge on the Blast Wave Propagation by Yoo, Yo-Han, Choi, Youngsik, Lee, Joonwon, Yun, Kyung-Jae

“…For several decades, a blast wave due to explosive detonation has been investigated extensively. Base on a significant amount of experimental data, the blast…”
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Rolling contact fatigue life of finish hard machined surfaces by Choi, Youngsik, Liu, C. Richard

“…A rolling contact fatigue life model encompassing crack initiation life and crack propagation life was developed in Part 1 of two companion papers. This paper…”
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A study of Inconel 718 dependency on stress triaxiality and Lode angle in plastic deformation and ductile fracture by Algarni, Mohammed, Bai, Yuanli, Choi, Youngsik

“…•A plasticity model with pressure and Lode angle dependence was extended to describe the behavior of Inconel 718.•Evolution of yield locus of Inconel 718 as…”
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A unified material model for multiaxial ductile fracture and extremely low cycle fatigue of Inconel 718 by Algarni, Mohammed, Choi, Youngsik, Bai, Yuanli

“…•Proposed a constitutive model for multiaxial and large-strain cyclic loadings.•Extended the MMC ductile fracture model to predict ELCF.•Provided extensive…”
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Effects of Cutting Speed on Surface Integrity and Fatigue Performance of Hard Machined Surfaces by Choi, Youngsik

“…The study investigates the effects of cutting speed on the surface integrity and fatigue performance of hard machined surfaces. The results demonstrated that a…”
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