Introduction
Bimonthly, started in 1957
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
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Experimental Study on Constant Amplitude Fatigue Performance of M20 High-strength Bolts for Fabricated Steel Structures under Owe-pretension Force
DOI:
10.16355/j.cnki.issn1007-9432tyut.2022.02.015
Received:
Accepted:
| Corresponding author | Institute | |
| SHEN Yu | College of Civil Engineering, Taiyuan University of Technology |
abstract:
MTS servo hydraulic fatigue testing machine was used to conduct 3 sets of static tensile tests and 10 sets of constant amplitude fatigue tests with under-pretension on the commonly used ML20MnTiB, 10.9, and M20 high-strength bolts in engineering. The constant amplitude fatigue failure curves were dram. The fatigue life calculation method was established, and the fatigue fracture macroscopic and microscopic analysis was carried out through the Phenom ProX scanning electron microscopy, which shows the typical features of the morphology of the fatigue source zone, expansion zone and instantaneous failure zone, and reveals the failure mechanism and failure process of high-strength bolts. The results provide a scientific basis for fatigue safety design and fracture analysis.
Keywords:
M20 high-strength bolts; constant fatigue; S-N curve; fracture analysis; failure mechanism;