The working device of wheel loader undergoes complicated load cycles in operation with changing attitude all the time. However, it is difficult to duplicate the exact load history in lab. The common practice is to apply a fixed load attitude and equivalent load, to the working device to assess its fatigue life. In this paper, a modeling technique to calculate equivalent attitude and equivalent load is proposed. In the process of equivalent model establishing, the damages at critical points are considered. The finite element method is used to obtain the strain time history to compare with tested data.
ChowCLYangFFangHE. Damage mechanics characterization on fatigue behavior of a solder joint material. Proc IMechE, Part C: J Mechanical Engineering Science2001; 215: 883–892.
2.
DragoniE. Effect of thread pitch on the fatigue strength of steel bolts. Proc IMechE, Part C: J Mechanical Engineering Science1997; 211: 591–600.
3.
YangFSaxenaA. Mechanisms of fatigue crack initiation in annealed, quenched and tempered 4340 steel. Proc IMechE, Part C: J Mechanical Engineering Science2000; 214: 1151–1161.
4.
EyerciogluOWaltonDDeanTA. Comparative bending fatigue strength of precision forged spur gears. Proc IMechE, Part C: J Mechanical Engineering Science1997; 211: 293–299.
5.
QiuLYuanSBaoQ, et al.Crack propagation monitoring in a full-scale aircraft fatigue test based on guided wave-gaussian mixture model. Smart Mater Struct2016; 5: 55–61.
6.
YuJZhengSZhaoZ, et al.A new spectrum development methodology for accelerated durability test. J Mech Strength2016; 2: 115–119.
7.
YamamotoMMakinoKIshidukaH. Comparison of crack growth behaviour between full-scale railway axle and scaled specimen. Int J Parasitol Fatigue2016; 92: 15–22.
8.
TremblayRLégerPRogersC, et al.Experimental testing of large scale structural models and components using innovative shake table, dynamic, real-time hybrid simulation and multi-directional loading techniques. In: Proceedings of the 3rd international conference on advances in experimental structural engineering, San Francisco, CA, 15–16 October 2009. Shanghai: China Architecture & Building Press.
9.
XiongJJShenoiRA. A load history generation approach for full-scale accelerated fatigue tests. Eng Fract Mech2008; 75: 3226–3243.
10.
HuaFZhengSFengJ, et al.Spectrum compilation for vehicle road simulation test based on time correlated fatigue analysis with damage editing method. J Mech Strength2015; 5: 142–149.
11.
BaeHRAndOHNamS, et al.Fatigue design load identification using engineering data analytics. J Mech Des2015; 137: 1–11.
12.
Gutiérrez-CarvajalREBetancurGRBarbosaJ, et al.Full scale fatigue test performed to the bolster beam of a railway vehicle. Int J Interact Des Manuf2018; 12: 253–261.
13.
SunTZhengFLiuB, et al.A study on the correlation between accelerated fatigue test and CAE analysis for a unitized vehicle body. Automot Eng2016; 3: 390–396.
14.
RongBTanZWXiaoP, et al.Study on the program load spectrum of the suspension fatigue bench test and correlation. In: Society of Automotive Engineers (SAE)-China Congress, Singapore: Springer, 2016, pp. 511–522.
15.
MusialWAllreadJ. Test methodology and control of full-scale fatigue tests on wind turbine blades. Wind Energy ASME1993; 14: 199–206.
16.
MalhotraPHyersRWManwellJF, et al.A review and design study of blade testing system for utility-scale wind turbines. Renew Sustain Energy Rev2012; 16: 284–292.
17.
CianettiFAlvinoABologniniA, et al.The design of durability tests by fatigue damage spectrum approach. Fatigue Fracture Eng Mater Struct2018; 41: 787–796.
18.
XiangQYLvPMWangBH, et al.Load equivalent method for fatigue bench test of hydraulic excavator stick. China J Highway Transp2018; 6: 217–326.
19.
LiaoGHWuJZ. Study on determination method of fatigue testing load for wind turbine blade. Int Conf Mech Mechatron Res2017; 307: 012040–012040.
20.
FanXNXuGNWangAH. Evaluation method of remaining fatigue life for crane based on the acquisition of the equivalent load spectrum by the artificial neural network. J Mech Eng2011; 20: 69–74.
21.
DongP. A structural stress definition and numerical implementation for fatigue analysis of welded joints. Int J Fatigue2006; 23: 865–876.
22.
DongPHongJKOsageDA, et al.The master S–N curve method an implementation for fatigue evaluation of welded components in the ASME B& PV Code Section Viii, Division 2 and API579-1/ASME FFS-1, New York: WRC Bulletin, 2010.
