This study analyzes structural stress and fatigue on control arm of automobile under nonuniform load. Maximum equivalent stress at bolt part is shown with 419.1MPa and the corner is deformed with maximum displacement of 1.1628mm. Among 3 cases of nonuniform fatigue loads applying on control arm, ‘AE bracket history’with the severest change of load becomes most unstable but ‘ample history’becomes most stable. In case of ‘ample history’with the average stress of -105 MPa to 105 MPa and the amplitude stress of 0 MPa to 105MPa, the possibility of maximum damage becomes 3%. This stress state can be shown with 6 times more than the damage possibility of ‘AE bracket history’or ‘AE transmission’ Safety and durability on automobile can be effectively improved by applying the fatigue analysis result on control arm.

Abstract
 1. 서론
 2. 구조 해석
  2.1 연구모델
  2.2 모델의 경계조건
  2.3 해석결과
 3. 피로 해석
  3.1 해석 조건
  3.2 해석결과
 4. 결론
 참고문헌

• 조재웅(공주대학교 기계자동차공학부) | Jae-Ung Cho