Yun-Jae Kim
고려대학교 기계공학과 · 공학
Yun-Jae Kim 교수의 연구실은 고강도 금속재료의 비선형 거동과 파손 거동을 해석하고, 이를 바탕으로 구조물의 안전성과 수명을 평가하는 데 중점을 두고 있습니다. 주요 연구 분야로는 고온·고속 응력 하에서의 파손 메커니즘, 용접부 및 결함이 있는 구조물의 한계하중 평가, 그리고 원자력 및 해상 풍력 구조물의 설계 및 안정성 분석이 포함됩니다. 특히 유한요소 해석과 실험을 융합한 정량적 평가 기법 개발을 통해 실용적이고 신뢰도 높은 설계 기준을 제안하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
The present paper proposes a robust method for the Ramberg-Osgood (R-O) fit to accurately estimate elastic-plastic J from the engineering fracture mechanics analysis based on deformation plasticity. The proposal is based on engineering stress-strain data to determine the R-O parameters, instead of true stress-strain data. Moreover, for practical applications, the method is given not only for the case when full stress-strain data are available but also for the case when only yield and tensile str
Genomic analysis of Thermococcus sp. NA revealed the presence of a 3,927-base-pair (bp) family B-type DNA polymerase gene, TNA1_pol. TNA1_pol, without its intein, was overexpressed in Escherichia coli, purified using metal affinity chromatography, and characterized. TNA1_pol activity was optimal at pH 7.5 and 75 degrees C. TNA1_pol was highly thermostable, with a half-life of 3.5 h at 100 degrees C and 12.5 h at 95 degrees C. Polymerase chain reaction parameters of TNA1_pol such as error-rate, p
This paper proposes a new method to estimate failure strength of a pipe with local wall thinning. The method is based on the equivalent stress averaged over the minimum ligament in the locally wall thinned region. The highlight of the proposed method is to propose a simple scheme to estimate the equivalent stress in the minimum ligament. Inspired by the reference stress method for approximate creep stress analysis, approximate estimation equations are proposed for the equivalent stress in the mi
