Johan Singh, P. ; Mukhopadhyay, C. K. ; Jayakumar, T. ; Mannan, S. L. ; Baldev Raj, (2007) Understanding fatigue crack propagation in AISI 316 (N) weld using Elber's crack closure concept: experimental results from GCMOD and acoustic emission techniques International Journal of Fatigue, 29 (12). pp. 2170-2179. ISSN 0142-1123
Full text not available from this repository.
Official URL: http://linkinghub.elsevier.com/retrieve/pii/S01421...
Related URL: http://dx.doi.org/10.1016/j.ijfatigue.2006.12.013
Abstract
An experimental study of fatigue crack propagation and crack closure behaviour, in compact tension specimens of AISI 316 (N) weld has been conducted. The crack closure load was determined from the changes in the slope of the load-displacement curves using global crack mouth opening displacement (GCMOD) type gauge. The results were compared with those measured by acoustic emission technique which showed good agreement with each other. The experimental data bear clear evidence of fatigue crack closure. The crack opening force was found to increase moderately with crack length and increasing R-ratio, under a constant Pmax of 5 kN. Above a critical R-ratio of 0.45 (approximately), the crack closure load is smaller than the minimum applied load. A good correlation was obtained for ΔKeff/ΔK = 0.6684 − 2.4135R + 7.0077R2 in the range 0 ≤ R ≤ 0.5. The magnitude of crack closure is used to interpret observed crack growth behaviour at different R-ratios.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Fatigue Crack Growth; 316 (N) Weld; Crack Closure; R-ratio Effect; GCMOD; Acoustic Emission |
| ID Code: | 40342 |
| Deposited On: | 23 May 2011 14:04 |
| Last Modified: | 23 May 2011 14:04 |
Repository Staff Only: item control page
