Crack Propagation and Strain Localization
The use of notched-beam fracture coupled with digital image correlation (DIC) techniques are being implemented to understand the crack propagation and strain localization response in cementitious systems and other novel binder systems. The geometric characteristics of the fracture process zone at the tip of the propagating crack are extracted using the DIC displacement and strain profiles, and used in inverse models to predict the tensile constitutive relationships for these quasi-brittle materials. This has resulted in an accurate identification of the effects of matrix modification on cementitious systems (through the use of several cement replacement materials) on the fracture toughness, strain energy release rates, and tensile response of these systems.
