Fracture analysis on fasten bolt of a shaft sleeve of escalator stave

2018 5th International Conference on Advanced Composite Materials and Manufacturing Engineering

Ren, Facai^1 ; Liang, Xiao^1

Shanghai Institute of Special Equipment Inspection and Technical Research, Shanghai

200062, China^1

关键词: Bolt fractures;    Fracture analysis;    Fracture mode;    Overload fractures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/394/3/032124/pdf
DOI  :  10.1088/1757-899X/394/3/032124

来源: IOP

【 摘 要 】

The fasten bolt of a shaft sleeve of escalator stave fractured during applications. The cause for fasten bolt fracture was investigated by means of macroscopic fractography, optical microscope and scanning electron microscope. The results indicate that superficial decarbonization occurred on the bolt screw thread and the depth overstepped the requirements of relevant standards. The fracture mode of fasten bolt of a shaft sleeve is clockwise torsion overload fracture.