Concrete fracture models: testing and practice

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Mode I fracture toughness determination with straight notched disk bending method (2011, neutral): “33ft (ft is the tensile strength) [43].”
Is the cause of size effect on structural strength fractal or energetic-statistical? (2004, background): “In this case, Eq. (6) needs a correction for large D [ 22 ].”
A phase-field formulation for dynamic cohesive fracture (2018, background): “see Borden et al. (2012), which poses a significant limitation for many important crack propagation problems. In addition, such formulations typically exhibit nonlinear behavior immediately at the onset of loading. In the quest to develop a remedy to these issues, researchers have adopted a number o”
3D Crack propagation in unreinforced concrete. A two-step algorithm for tracking 3D crack paths (2006, methodology): “Concrete may be considered as a quasi-brittle material, in which a sizeable nonlinear zone develops at the fracture front, which is almost entirely filled by the fracture process zone, and wherein plasticity effects are negligible [ 5 ].”