Abstract
In this study, the effect of various misalignments of the circular notched bar (CNB) specimens on the fatigue crack propagation behavior of pipe grade polyethylene is investigated by three dimensional numerical analyses. The effect of the asymmetric crack growth of the misaligned CNB specimens on the lifetime to failure is also addressed. Two types of misalignments of the CNB specimen, i.e., (a) a concentric misalignments (Case I) and (b) an angular misalignments (Case II), are considered using finite element analysis. It is observed that as the misalignments increase, the asymmetric crack growth is accelerated so that the time to reach the critical SIF decreases. Therefore, it can be understood that the lifetime to failure of CNB specimens can vary noticeably once the CNB specimen is misaligned initially. Considering results from this study, the fatigue crack growth behavior including the estimation of the lifetime of CNB specimens should addressed by considering the misalignment effects.
| Original language | English |
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| Publication status | Published - 2011 |
| Event | EUROTEC 2011 Conference, in Conjunction with EQUIPLAST - Barcelona, Spain Duration: 2011 Nov 14 → 2011 Nov 15 |
Other
| Other | EUROTEC 2011 Conference, in Conjunction with EQUIPLAST |
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| Country/Territory | Spain |
| City | Barcelona |
| Period | 11/11/14 → 11/11/15 |
Keywords
- Circular notched bar (CNB)
- Fatigue lifetime
- Misalignment
ASJC Scopus subject areas
- Polymers and Plastics