대한기계학회논문집 (Transactions of the Korean Society of Mechanical Engineers)
- 제13권2호
- /
- Pages.252-256
- /
- 1989
- /
- 1225-5963(pISSN)
DOI QR Code
저주기 피로 파괴 하중하에서 AE수 변화율과 균열성장율에 관한 연구
AE Count Rate and Crack Growth Rate under Low Cycle Fatigue Fracture Loading
초록
본 연구에서는 탄성-소성 피로파괴 시험을 하여 dN/dn과 .DELTA.J의 관계와 dN/과 da/dn의 관계에 대한 실험식을 얻고 이론적인 해석결과와 비교 검토하고자 한다.
In the low cycle fatigue fracture testing with KS(or JIS) SS41, crack growth rate, AE count rate and J-integral range are measured to get empirical relations between crack growth rate and J-integral range, AE count rate and J-integral range as well as AE count rate and crack growth rate. All the relations are shown to be linear on the log-log graphs. It is also shown that the linear relations can be formulated by using Dunegan's assumption and elastic-plastic fracture mechanics along with the well-known relation of crack growth rate and J-integral range. It is concluded that the differences between experimental and theoretical values are due to Dunegan's assumption.
키워드