Fracture mechanics is a field of mechanics concerned with the study of the propagation of cracks in materials. It uses analytical solid mechanics methods to calculate the crack propelling driving force on a crack and experimental solid mechanics methods to characterize the material's resistance to fracture. Fracture mechanics is used to differentiate the loads on the crack. In general terms, a single parameter is used to determine the loading conditions at the crack tip. Experimental studies on fracture mechanics have shown that the relationship between the tensile stress and dimensions of geometrically similar elements is in the opposite direction. It is observed that the tensile capacity decreases as the size of the elements increases. The aim of this study is to experimentally obtain the breaking loads of notched concrete beam specimens under bending stress. In order to determine the starting point of the crack, the beams were produced with notches in the middle. In the experimental study carried out in this direction, beam samples of different sizes and notches of different sizes were used. For each notch type, 3 test series consisting of 3 samples were produced from C20 concrete, by choosing beam sizes to be twice the previous ones in each series. The existence of the size effect was clearly seen with the results obtained from the experiments.
ORCID NO: 0009-0003-3765-6353
Anahtar Kelimeler: Fracture Mechanics, Size Effect, 3-Point Loading
|
