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곽호택(Hotaek Kwak),정수진(Soo-Jin Jeong) 한국자동차공학회 2020 한국자동차공학회 지부 학술대회 논문집 Vol.2020 No.6
This paper presents the method in integrated aluminum profile die design and simulation technology with the emphasis on product quality control and improvement. It includes balancing of the material flow by means of die design optimization, control of velocity deviation during extrusion process, controlling of location and strength of seam welds. The approach is based on numerical simulation software, QForm Extrusion and use automated die design software, QExDD(QForm Extrusion Die Designer). Some industrial case studies are discussed in this paper. Finally, we can obtain high quality profile shape without real die modification or re-creation by using our suggested virtual extrusion technology.
[안전부문] 옵셋 정면 충돌 해석용 배리어 개발에 관한 연구
고순탁(Soontak Kho),곽호택(Hotaek Kwak),이진희(Jinhee Lee),정봉식(Bongsik Jang),김헌영(Heonyoung Kim) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.11_2
The aim of this work is to develop a deformable offset barrier model for the frontal offset crash FE analyses. Offset deformable barrier is represented by a finite element model and the calibration of its strength, crash characteristics against the high-speed pole impacts verified with the with the physical pole impact test results.<br/> It is shown that the performance of ODB FE model arc well correspondent with physical test results and the bonding effects, fracture phenomena of aluminum honeycomb during crash events arc comparatively well realized against physical ones.<br/>
김병우(Byeongwoo Kim),김창석(Changsuk Kim),권오영(Oyoung Kwon),곽호택(Hotaek Kwak),강성직(·Sunggik Gang) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
This paper deals with the development method of finite element analysis for fatigue lifetime prediction of a braided wire under banding load condition. Recently, the proportion of importance about NVH is increasing in the automotive. To meet these needs, normal wire used for ground of engine and transmission was changed to braided wire that has excellent flexibility and durability. In case of used ground wire at engine or transmission is influenced banding load by repeated engine rolling. braided wire may be broken by these banding load. Therefore, To improve problem of design beforehand, developed fatigue simulation method for prediction of fatigue lifetime of braided wire under banding load condition.
이축하중을 받는 자동차용 휠의 내구수명 평가를 위한 유한요소해석
이승열(Seung-yeol Lee),김헌영(Heon Young Kim),이경택(Kyoung Taek Lee),곽호택(Hotaek Kwak) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
To test the performance of wheel fatigue, the radial and bending fatigue tests are usually used in automotive industry, respectively. These two relatively independent bench tests can only inspect the single fatigue. However, they cannot satisfy the inspection in complex driving conditions such as biaxial loads. For complement weak points, the fatigue test is defined in SAE standards J2562 for the wheel which receives biaxial loads simultaneously. For simulation of biaxial wheel fatigue test, we performed a nonlinear dynamic structural analysis and fatigue analysis in this paper. Nonlinear dynamic structural analysis was performed using the LS-DYNA™ and fatigue analysis was performed using the nCode Designlife™. To evaluate accuracy and propriety of the analysis result, we compared analysis result with test result. Fatigue life and the cracked location from fatigue analysis was similar with the test result.