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잔류응력을 고려한 Lower Control Arm의 내구해석
최보원(Bowon Choi),강우종(Woojong Kang),고웅희(Woonghee Ko),김기훈(Gihoon Kim) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_3
Fatigue life prediction of a lower control arm is carried out with finite element methods. The lower control arm has heat effected zone induced from a seam welding process. The residual stresses generated in the zone are measured by a x-ray stress analyzing equipment. Since the residual stress has much effects on the fatigue life, the residual stress is considered in the fatigue life prediction process as mean stresses with relaxation effect. The heat transfer and a thermal elasto-plastic analyses are performed and verified with measured residual stress value. The fatigue life predicted by simulations are compared with test results.