Browse > Article

A Study on the Fatigue Crack Growth Behavior in Residual Stress Field of the SS41 Welding Material  

Choi, Byung-Ki (Department of Mechanical Engineering, Chosun University)
Publication Information
Journal of the Korean Society of Safety / v.17, no.1, 2002 , pp. 33-38 More about this Journal
Abstract
SS41 material is welded automatically and is investigated some effects of the welding residual stress on the growth and propagation of fatigue crack, so as to study the fatigue behaviour in the welding residual stress field. The summarized results are as follows; 1) In case of the load amplitude is constant, as the stress ration is changing to 0.1, 0.33 and 0.5 the propagation life is constant but the initiation life decreases. And than, when maximum load or minimum load is constant, s the stress ration increases the initiation life and propagation life. 2) It was shown that the fatigue crack propagation ratio da/dn was almost constant regardless of the stress ratio change at constant load amplitude and that the larger stress ratio, the slower was the fatigue crack propagation ratio. 3) The opening ratio U is influenced by $K_{max}$ but it isn't only the function of $K_{max}$ because data range is very large. 4) The fatigue life of the specimens on tensile compressive residual stress field was decreased and increased respectably more than that of the base metal.
Keywords
fatigue behavior; load amplitude; stress ratio; initiation life; propagation life; opening ratio;
Citations & Related Records
연도 인용수 순위
  • Reference
1 S. J. Hudak, and D. L. Davidson, 'The depend-ence of crack closure on loading variables,' ASTM STP 982, pp. 121~138, 1988
2 B. M. Kapadia, 'Influence of Residual Stresses on Fatigue Crack Propagation in Electroslag Welds,' Fa-tigue Testing of Weldment, ASTM STP 648, pp. 244~260, 1978
3 H. S. Reemsnyder, 'Development and Application of Fatigue Data for Structural Steel Weldments,'Fatigue Testing of Weldment, ASTM STP 648, pp. 3~21, 1978
4 김두환, '극한조건하 강구조 부재 이음부의 파괴거동해석,' 산업안전학회지, Vol. 13, No. 4, pp. 213 ~220, 1998
5 H. U. Staal, J. D. Ellen, 'Crack Closure and In-fluence of Cycle Ratio on Fatigue Crack Growth in Type 304 Stainless Steel at Room Temperature,' Engineering Fracture Mechanics, Vol. 11, pp. 275~283, 1979   DOI   ScienceOn
6 村上理一, 秋園辛一, "鎔接殘留應力て"の疲勞き裂成長速度の評價," 鎔接學會論丈集. Vol. 2, No. 4, pp. 144~150, 1984
7 W. Elber, 'The significance of fatigue crack clo-sure,' Damage Tolerance in Aircraft Structure, ASTM STP 486, pp. 230~242, 1971
8 宋 森弘, 國尾 武 '高强度鋼のミク口領域 における疲勞き裂生成科程,' 日本賤?學會論文集, Vol.40, No. 334, pp. 1503~1510, 1974
9 차용훈, '압력용기 보강재의 용접 형태에 따른피로균열성장거동에 관한 연구,' 산업안전학회지, Vol. 16, No. 3, pp. 1~6, 2001
10 W. W. chonherr, 'Analysis based on cases of dam-age involving brittle fracture collocated by the SCXD of the IIW,' The Japan Welding Society, pp. 5-11, 1971