Abstract
The load-bearing capacity of a CC(T) specimen (Center-Cracked Tension) in the ductile fracture regime is usually controlled by plastic collapse. If the material’s tearing resistance is sufficiently low, the load-bearing capacity can drop below the plastic collapse value. Here, a recently developed simple fracture mechanics-based Charpy-V impact energy criterion for plastic collapse was used to provide a best estimate assessment of the CC(T) specimen load-bearing capacity.
Highlights
Fracture mechanics is usually used mainly to ensure that a structure will not fail due to possible flaws
The results show a positive trend between proportional maximum net section stress and the ratio between real and required impact energy
The load-bearing capacity of a CC(T) specimen in the ductile fracture regime is usually controlled by plastic collapse
Summary
Fracture mechanics is usually used mainly to ensure that a structure will not fail due to possible flaws. If the material’s ductile tearing resistance is sufficiently low, it is possible that ductile crack growth lowers the maximum load-bearing capacity below the plastic limit load. To safeguard against such events, a criterion for the ductile tearing resistance is needed. A simple criterion for plastic collapse was developed based on the Kr/Lr ratio [1]. Kr represents the ratio between the elastic crack driving force and the material’s fracture toughness, corresponding to a specific fracture definition [1]. The criterion results in a simple Charpy-V requirement to ensure that the maximum load will be controlled by the limit load
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