Quantification of notch type and specimen thickness effects on ductile and brittle fracture behaviour of drop weight tear test

In this paper, effects of the notch type and specimen thickness on fracture behaviour of DWTT for API X80 at transition temperatures are quantified via FE analysis. Two notch types (press and chevron notch) and two specimen thicknesses (19 mm and 25 mm) are considered for the DWTT specimen. Fracture behaviours of the DWTTs are investigated using a ductile-brittle fracture simulation model. The ductile-brittle fracture simulation model is validated by comparing simulation results with experimental data. From the simulation results, it is found that the effect of the notch type and specimen thickness on fracture behaviour of DWTT can be well reproduced. Finally, the experimental findings are quantitatively supported by using the ductile-brittle fracture simulation method.

Automated summary

The paper quantifies the effects of notch type and specimen thickness on fracture behavior of DWTT for API X80 at transition temperatures through FE analysis. It investigates two notch types and two specimen thicknesses using a ductile-brittle fracture simulation model, which is validated by comparing with experimental data. The study shows that the impact of notch type and specimen thickness on DWTT fracture behavior can be well reproduced, and experimental findings are quantitatively supported using the ductile-brittle fracture simulation method.