|
|
|
| FATIGUE-CRACK INITIATED FROM NOTCH TIP UNDER CYCLIC COMPRESSIVE LOAD |
| LIU Tianhua (Design Institute of Shoudu Iron arid Steel Co.; Beijing); CHU Wuyang; XIAO Jimei; JIN Lianqiang (Beijing University of Iron and Steel Technology)(Manuscript received 26 March; 1983; revised manuscript 27 December; 1983) |
|
Cite this article:
LIU Tianhua (Design Institute of Shoudu Iron arid Steel Co.; Beijing); CHU Wuyang; XIAO Jimei; JIN Lianqiang (Beijing University of Iron and Steel Technology)(Manuscript received 26 March; 1983; revised manuscript 27 December; 1983). FATIGUE-CRACK INITIATED FROM NOTCH TIP UNDER CYCLIC COMPRESSIVE LOAD. Acta Metall Sin, 1984, 20(5): 341-347.
|
|
|
Abstract Fatigue-crack initiation and growth was investigated by testing an ultra-high strength steel and Al alloy using a notch specimen under cyclic compressive load. Results showed that the fatigue-crack initiation and growth is started from the notch tip and its threshold value △σ_(th) or △K_(th)(ρ) is about 4 times the magnitude of that under tensile load. The crack growth could propagate at a decreasing rate and stop eventually until such length as 0.2—0.5 mm. The threshold value △K_(th)(ρ) under cyclic compressive load would be identical with that under cyclic tensile load and the fatigue-crack could continue to propagate if the minimum cyclic compressive load is near zero. The dα/dN under compression-zero fatigue, however, is 10 to 100 times smaller than that under tensile fatigue.
|
|
Received: 18 May 1984
|
1 Reid, C. N. Williams, K.; Hermann, R., Fatigue Eng. Mater. Struct., 1(1979) . 267．
2 褚武扬编著,断裂力学基础,科学出版社,1979,p.116．
3 姚京;褚武扬;肖纪美,金属学报,19(1983) ,A445．
4 Chu W. Y. (褚武扬); Ma R. T. (马若涛); Hsiao C. M. (肖纪美), Scr. Met., 18(1984) , 579．
5 Chu W. Y. (褚武扬); Jing Y. (姚京); Hsiao C. M. (肖纪美), Corrosion, 40(1984) , 302．W |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
