Friction welding in dissimilar materials is widely applied in various engineering fields such as automobiles, rolling stocks, machine tools. Since interface edges of Friction-welded materials have stress singularity by differences of mechanical properties and temperature changes, it is necessary to assess stress singularity with the variation of flash shape and length. In this paper, the influences which the flashes created by friction welding concern to the stress singularity at interface edges are investigated. Through stress analysis by the BEM and static experiments, the influences were studied quantitatively, the stress singularity greatly depends on the shape of the flash and its size.

Abstract
 1. 서론
 2. 시편제작
  2.1 제작방법
  2.2 덧살형상
 3. 수치해석
  3.1 BEM 응력해석 모델
  3.2 해석조건
  3.3 접합계면의 응력분포
  3.4 응력특이성계수
 4. 실험
 5. 실험결과 및 고찰
  5.1 파단면
  5.2 파단강도
 6. 결론
 후기
 References

• 박철희(인천대학교 제물포캠퍼스 기계로봇공학과) | C. H. Park
• 김은영(인천대학교 기계로봇공학과) | E. Y. Kim Corresponding Author