Comparison of crack growth behaviour between full-scale railway axle and scaled specimen

Full scale fatigue test performed to the bolster beam of a railway vehicle

“…Moreover, materials as aluminum have a finite number repairs and then, after several welds, it is necessary to replace the entire element, being an expensive task that reduce drastically the vehicle availability [4], so the bolster beams made on this material requires of special care during its design stage to reduce those maintenance task at maximum. Full-scale mechanical tests could help to predict the most probable location of fissures and when they could appear in order to program its maintenance, increasing the reliability of the entire vehicle better than other techniques such as scale test and numerical simulation, which miss-estimates several factors [32]. However, resources to perform mechanical tests at full scale requires of facilities that are not disposable in every country.…”

Research on the load equivalent model of wheel loader based on pseudo-damage theory

“…As shown in Figure 15, the loader working device is adjusted to the shoveling attitude (worst case for boom structure). d, h and � are position parameters of the equivalent external load acting point for the working device, which can be obtained from equation (7). L P_O1 , L P_O2 , L P_O3 , L P_O4 are functions of d, h and �, representing the vertical distance of the load P to O 1 , O 2 , O 3 , O 4 , respectively, and are shown as equations ( 3)-( 6) Figure 13.…”

“…In order to accurately assess fatigue life of a structure by laboratory fatigue bench test, some analysis methods for laboratory load equivalent were proposed by many authors. [1][2][3][4][5][6][7] Tremblay et al 8 developed a multi-axis test for rectangular bridge piers subjected to bi-directional seismic load, which can simulate the fatigue life of the bridge structure in lab. Xiong et al 9 established a load history generation approach for full-scale accelerated fatigue tests, which can minimize experimental time, and be applied to the fullscale accelerated fatigue test of helicopter tail.…”

Report of Committee III.2: Fatigue and fracture

“…The results were in good agreement given that the initial distortion shape and geometrical nonlinearity are considered in the analysis. The fatigue strength of full-scale railway axels was compared to one of the scaled specimens in (Yamamoto et al, 2017) and the difference was found to be within the error margin. The fatigue strength of full-scale U-rib bridge steel deck specimens under the vehicle loads was investigated in (Kainuma et al, 2016).…”