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| Ultimate Bearing Law of Circular Shaft Structure with Defect |
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| DOI：10.7643/issn.1672-9242.2023.06.001 |
| KeyWord:prefabrication defect ultimate torque bearing capacity drive shaft failure analysis numerical simulation |
| Author | Institution |
| GONG Xiao-kang |
College of Sciences, National University of Defense Technology, Changsha , China |
| LI Xiang-yu |
College of Sciences, National University of Defense Technology, Changsha , China |
| TIAN Zhan-dong |
College of Sciences, National University of Defense Technology, Changsha , China |
| PENG Yong |
College of Sciences, National University of Defense Technology, Changsha , China |
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| Abstract: |
| The work aims to study the change rule of ultimate bearing capacity of damaged vehicle drive shafts. The defects were prefabricated on a circular shaft and the torsional load bearing capacity of the circular shaft structure with defects was investigated experimentally and numerically. The results showed that when the depth-diameter ratio of the circular hole defect remained unchanged, the decreasing ratio of ultimate torque of the circular shaft decreased with the increase of circular hole defect aperture ratio. The decreasing ratio of the ultimate torque of the circular shaft decreased with the increase of the depth-diameter ratio of the circular hole defect when the aperture ratio of the circular hole defect remained unchanged. When the depth-diameter ratio was greater than 0.4, the decreasing ratio of the ultimate torque of the circular shaft was approximately negatively linear correlated with the aperture ratio of the circular hole defect. When the defect aperture ratio was greater than 0.4 and the depth-diameter ratio was greater than 0.2, the maximum torsion angle of the circular shaft decreased to between 15° and 35°, and there was little difference in the maximum torsion angle between the circular shaft with defects. When torsional failure occurs, the maximum torsion angle and ultimate torque of the circular shaft are negatively correlated with the aperture ratio and the depth-diameter ratio of the circular hole defect. In the process of increasing aperture ratio and depth-diameter ratio, the limiting torque decreases gradually in an approximate linear relationship, while the maximum torsion angle decreases sharply at first and then gradually becomes stable. |
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