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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.13 [2006] >
IJEMS Vol.13(5) [October 2006] >
| Title: | Investigation of low cycle fatigue crack opening size and closure stress |
| Authors: | Daunys, M
Taraškevičius, A |
| Issue Date: | Oct-2006 |
| Publisher: | CSIR |
| IPC Code: | G01N3/00 |
| Abstract: | In the recent years,
a number of studies on the fatigue crack opening and crack closure load have
been carried out. Present investigation serves as an intermediate point to
complete a failure prediction model with a more practical value for
determination of leak before the break (LBB) problem in pressure vessels and
pipes. An attempt has been made to solve this problem by using analytical,
numerical and experimental methods. Method of linear fracture mechanics at analytical
investigation by using the analogy between the stress strain state at stress
concentrator and the crack tip and strain intensity factor is adapted to the
nominal elastic-plastic loading. Investigation has showed that numerical
results are in good agreement with the experimental results. However, the
proposed analytical model satisfactorily matches with the experiment in the
middle of the crack, which is acceptable for LBB conception, and incorrect at
the crack tip, which is non-acceptable for the fracture mechanics conception. |
| Page(s): | 417-425 |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.13(5) [October 2006]
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