Characterization on tensile behaviors of fracture process zone of nuclear graphite using a hybrid numerical and experimental approach

Effect of carbonation treatment on fracture behavior of low-carbon mortar with recycled sand and recycled powder

“…The energy dissipation during the fracturing process is concentrated in the fracture process zone (FPZ), which is a damage zone with many fracture toughening mechanisms, including microcracking, crack deflection, branching and aggregate bridging [52]. The geometry of FPZ can be visualized by the measured surface strain field [53][54][55][56]. To employ it, it is necessary to specify the strain threshold to eliminate the irrelevant noise [56,57].…”

“…The geometry of FPZ can be visualized by the measured surface strain field [53][54][55][56]. To employ it, it is necessary to specify the strain threshold to eliminate the irrelevant noise [56,57]. The maximum tensile strain was approximately taken as the result of dividing tensile strength ft by E, and the value of ft was taken as 0.9 times of fst [58].…”

“…100, CRAM-100, FRAM-20 and CFRAM-20. The FPZ can be considered as the area of strain localization [55][56][57]59]. To better compare the FPZ evolution of different mortars, the same strain interval was used at each loading stage.…”