Investigation Of Automobile Crankshafts Fatigue Damage For Characterization With Parameter Of Magnetic Memory

At present, auto industry of China develop rapidly, the energy and the environment facing increasing pressure. The Government, society, and enterprises must envisage and consider the problem how the auto industry can take sustainable development path on energy conservation and environmental protection, and promotion development of the automobile industry and socio-economic.On the basis of our study group, this paper improves several bending testers for crankshaft, and in accordance with principles of harmonic resonance designs torsion test system. To ensure that the load standardization and consistency in test, we calculate structural parameters of bending and torsional fatigue test system using the principle for load calibration. When the value of the acceleration is clear, test system will be able to easily quantify the bending moment and torque. At the same time, by system modeling and using FEM, the natural frequencies of resonator is extracted, the modal analysis is conducted. The data of theoretical calculations of tester system compare with actual result, the theory and practice that have made quite a good contrast. In addition, crankshaft bending and torsion fatigue failure mode can be appropriate certification in FEM software.Innovation: First time discovering the law of full process of crankshafts fatigue damage for characterization with parameter of magnetic memory by processing parameter of magnetic memory of crankshafts fatigue damage. The meaning is as follows:The subject proves the feasibility of residual fatigue life assessment of end-of-life components for magnetic memory tester, and supply the theoretical guidance for residual fatigue life assessment of end-of-life crankshafts.