Mixed-mode Ⅰ-Ⅱ fracture response in terms of fracture micromechanisms and macroscopic fracture toughness was examined with four different elastic-plastic ductile materials in inert conditions at room temperature. Materials studied were F82H, A533B, AISI 304 (sensitized) and CuA125 alloy. Fracture resistance testing was conducted with the asymmetric four point bend (ASFPB) setup and detailed fractographical studies were performed. Numerical analysis results were integrated in order to gain knowledge leading to the transitions in fracture mechanisms and fracture toughness. Results demonstrate a significant decrease in fracture toughness, which is attributed to differences in fracture micromechanisms. General description is attained when combining numerical analysis results pertaining the differences in continuum behavior.
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