- 홀확장과 링압인 동시적용에 의한 피로균열지연
- ㆍ 저자명
- 유진상,Yu. Jin-Sang
- ㆍ 간행물명
- 大韓機械學會論文集. Transactions of the Korean Society of mechanical engineers. A. A
- ㆍ 권/호정보
- 1997년|21권 2호|pp.305-316 (12 pages)
- ㆍ 발행정보
- 대한기계학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
A more efficient method for obtaining the fatigue life enhancement of a structure member with fastener holes is described. It is based on the combined process of cold-expansion and ring-indentation. Residual stresses were induced onto premachined holes using ring-indentation process near the fastener hole combined with cold-expansion. And residual stresses at the vicinity of a hole were evaluated using a fracture mechanics approach. The compressive residual stresses were larger using the combined process than is in the case of simple cold-expansion. Fatigue testing of aluminum specimens showed that the fatigue crack growth retardation emanating from a circular hole was greater for the combined process than for a simple cold-expansion alone.