Since 1963
ARTICLE
Use of the biaxial coefficient in determining life for a combination of cyclic bending and torsion of bronze RG7
1
Opole University of Technology, Opole, Poland
Submission date: 2023-08-29
Final revision date: 2023-11-21
Acceptance date: 2024-01-29
Online publication date: 2024-07-31
Publication date: 2024-07-31
Corresponding author
Journal of Theoretical and Applied Mechanics 2024;62(3):547-560
KEYWORDS
TOPICS
ABSTRACT
The paper proposes a new multiaxiality coefficient that can characterize fatigue tests for
various combinations of bending and torsion. This coefficient can be defined depending on
the criterion used. The factor is 1 for cyclic bending and 2 for pure torsion. Based on
the fatigue tests of the RG7 bronze, analysis of calculation dispersion of the fatigue life
was carried out concerning test results obtained through an experiment. This analysis was
performed separately for individual tested combinations and for selected multiaxial fatigue
criteria. The selected criteria are Huber-Mises, Gough-Pollard, maximum normal stress,
maximum shear stress, and maximum normal and shear stress in the plane defined by
shear stresses. The average values of the obtained durability were compared to the newly
defined multiaxial coefficient distinguishing different combinations of bending and torsion.
Fractographic analysis was also performed for selected samples for all four combinations of
fatigue tests. It was found that the failure planes and design critical planes do not coincide.
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| eISSN: | 2543-6309 |
| ISSN: | 1429-2955 |
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