Comparison of fatigue failure criterion in flexural fatigue test

Obtaining the fatigue laws of bituminous mixtures from a strain sweep test: Effect of temperature and aging

“…The advantage of these criteria based on dissipated energy versus that calculated from the reduction of the initial modulus to 50% resides in that the former are based on mechanical principles and depend on the material [20]. Furthermore, by comparing the energy ratio (ER) approach with the classical one, Tarefder, et al [21] found that fatigue life using the first approach was longer than that found using the classical failure criterion, indicating its conservative position. Tests on aged specimens were performed and then compared with tests carried out on unconditioned samples.…”

Effect of Loading Frequency and Temperature on the Fatigue Parameters of Asphalt Concrete

“…The middle two clamps are loading frames that apply downward and upward force to attain the predefined strain in the sample. Using the deflection history, the maximum strain and stress in a specimen can be calculated using the following equations, respectively [2]:…”

“…These microcracks coalesce to form macrocracks under further traffic loading, leading to pavement failure. The fatigue behavior of hot-mix asphalt (HMA) has been characterized by four-point bending (4PB) fatigue test in the laboratory by many researchers in the past [1,2]. In this test, an AC beam is subjected to repeated bending in strain-controlled mode until the stiffness is decreased by 50 % of its initial stiffness, which is the traditional failure criteria.…”