Abstract
The paper analyses the fatigue tests of a specimen made of 16Mo3 steel and 6082-T6 aluminium alloy performed under bending and tensile conditions. It has been shown that in the case of bending of the 16Mo3 steel specimen, in low cycle fatigue (LCF) range, the fatigue life is increased with respect to the results obtained under tension-compression conditions. On the other hand, in the case of the aluminium specimen, the load condition practically does not affect the fatigue life. Microstructural analysis revealed almost homogeneous fatigue cracks in the 16Mo3 steel samples which are practically elastic-plastic. The analysed 6082-T6 aluminium alloy belongs to the group of materials characterized by elastic and brittle properties. In the case of pendulum bending in the obtained images, it is possible to notice the clear pits at an angle of about 45 degrees relative to the surface of the breakthrough. They penetrate the broken specimen to about 33%. In the middle of the material, the bending plane is clearly visible, where the stress is constant and equals 0 MPa.
Highlights
I n most cases, as far as a fatigue life analysis is concerned, only normal or tangential stresses are mentioned
The analysis of the impact of various load conditions on a fatigue life is made in this study
While analysing the results presented in this figure, we can notice that fatigue life for steel depends on the load type
Summary
I n most cases, as far as a fatigue life analysis is concerned, only normal or tangential stresses are mentioned. Normal stress amplitude a may originate from tensioncompression, pendulum bending with a cantilever, three-point or four-point bending or rotary bending. The differences in fatigue life resulting from a load condition [1 - 5] were noted. A different fatigue life corresponds to the same strain or tension amplitude. The analysis of the impact of various load conditions (tension-compression and cantilever pendulum bending) on a fatigue life is made in this study. This analysis is carried out based on the elastic-brittle material (aluminium 6082-T6) and the elastic-plastic material (steel 16Mo3). The impact of the load condition on a fatigue life and a fatigue breakthrough structure is compared
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
