JUN QIU
Associate Professor
Shanghai Institute of Special Equipment Inspection and Technical Research
Tong Yaoting
Research Associate
Shanghai Institute of Special Equipment Inspection and Technical Research
Ouyang Weiping
Research Associate
Shanghai Institute of Special Equipment Inspection and Technical Research
Chai Xing
Research Associate
Shanghai Institute of Special Equipment Inspection and Technical Research
Zhao Youle
Research Assistant
Shanghai Institute of Special Equipment Inspection and Technical Research
Associate Professor
Shanghai Institute of Special Equipment Inspection and Technical Research
Tong Yaoting
Research Associate
Shanghai Institute of Special Equipment Inspection and Technical Research
Ouyang Weiping
Research Associate
Shanghai Institute of Special Equipment Inspection and Technical Research
Chai Xing
Research Associate
Shanghai Institute of Special Equipment Inspection and Technical Research
Zhao Youle
Research Assistant
Shanghai Institute of Special Equipment Inspection and Technical Research
Finite Element Method Simulation and Multifactor Failure Analysis of an Important Stepped Shaft Fracture Events
ABAQUS finite element method was used to simulate and analyze a fracture event of an important stepped shaft parts. The results show that the stress concentration is serious at the step where shaft fracture occurs. The maximum stress occurs at the R2 transition corner and the value under the most unfavorable condition is 319.9MPa, which exceeds the yield strength limit of the material. SEM and X-ray analysis, design analysis, machining quality analysis and Heat Treatment process quality analysis show that fracture of the shaft is a fatigue fracture initiated by multiple sources, and the initiation is mainly related to the small turning radius of the step. The rough surface with micro-defects may be the origin of fatigue crack initiation, and the improper control of the quenching and tempering process has a negative impact on the initiation of the crack.
