<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Modern methods of testing materials require the use of the latest technologies and combining measurement and calculation methods. It is important to find a quantitative way of describing, among other things, the failures so that it can help to design with high accuracy. This paper studies loading orientations on crack shape and fracture surface changes. The advantage of the entire fracture surface method is simplicity and applicability in studies on other materials, shapes and loadings. A higher values of fracture surface parameters (Sx, Vx) was observed in failure specimens with lower σ/τ (B/T) ratios. It has been observed that largest crack lengths with a small number of cycles occur for loading combinations different then B=T. As well as analyzed surface parameters Sx, Vx, are higher for larger number of cycles to crack initiation (Ni) values.</p></abstract>

Modern methods of testing materials require the use of the latest technologies and combining measurement and calculation methods. It is important to find a quantitative way of describing, among other things, the failures so that it can help to design with high accuracy. This paper studies loading orientations on crack shape and fracture surface changes. The advantage of the entire fracture surface method is simplicity and applicability in studies on other materials, shapes and loadings. A higher values of fracture surface parameters (Sx, Vx) was observed in failure specimens with lower σ/τ (B/T) ratios. It has been observed that largest crack lengths with a small number of cycles occur for loading combinations different then B=T. As well as analyzed surface parameters Sx, Vx, are higher for larger number of cycles to crack initiation (Ni) values.

Effect of non-zero mean stress bending-torsion fatigue on fracture surface parameters of 34CrNiMo6 steel notched bars

University of Occupational Safety Management

Production Engineering Archives

This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License.

Modern methods of testing materials require the use of the latest technologies and combining measurement and calculation methods. It is important to find a...

Effect of non-zero mean stress bending-torsion fatigue on fracture surface parameters of 34CrNiMo6 steel notched bars

Online veröffentlicht: 31. Dez. 2020

Seitenbereich: 167 - 173

Eingereicht: 03. Okt. 2020

Akzeptiert: 18. Nov. 2020

DOI: https://doi.org/10.30657/pea.2020.26.30

Schlüsselwörter
multiaxial fatigue, bending-torsion, notch effect, fatigue fracture, surface topography

© 2020 Wojciech Macek et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License.

Effect of non-zero mean stress bending-torsion fatigue on fracture surface parameters of 34CrNiMo6 steel notched bars

Online veröffentlicht: 31. Dez. 2020

Seitenbereich: 167 - 173

Eingereicht: 03. Okt. 2020

Akzeptiert: 18. Nov. 2020

DOI: https://doi.org/10.30657/pea.2020.26.30

Schlüsselwörtermultiaxial fatigue, bending-torsion, notch effect, fatigue fracture, surface topography

© 2020 Wojciech Macek et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License.

Schlüsselwörter
multiaxial fatigue, bending-torsion, notch effect, fatigue fracture, surface topography