Two basic procedures are currently available to determine the critical condition of a flawed structure, at which unstable crack extension may occur. The first method based on elastic-plastic fracture mechanics is accurate but requires a time consuming elastic-plastic finite element analysis. The second method estimates the critical condition with an interaction diagram between linear elastic fracture mechanics describing brittle fracture, and a limit load analysis of the net section, i.e. the un-flawed ligament. This method is simpler to use but has a lower level of accuracy. The current paper provides a third option, consisting of a constraint-modified failure assessment procedure. It uses a linear elastic solution for evaluating brittle fracture and a simplified elastic-plastic analysis for evaluating plastic collapse. This third option provides good agreement with three considered tests.
|Number of pages||6|
|Publication status||Published - 2019|
|Event||3rd International Conference on Structural Integrity and Durability: Fatigue, Fracture and Failure - Dubrovnik, Croatia|
Duration: 4 Jun 2019 → 7 Jun 2019
|Conference||3rd International Conference on Structural Integrity and Durability|
|Period||4/06/19 → 7/06/19|