Utilize este identificador para referenciar este registo:
https://hdl.handle.net/10316/96904
Título: | Fracture Surface Behavior of 34CrNiMo6 High-Strength Steel Bars with Blind Holes under Bending-Torsion Fatigue | Autor: | Macek, Wojciech Branco, Ricardo Costa, José Domingos Moreira da Trembacz, Jarosław |
Palavras-chave: | 3D fractography; Bending–torsion; High-strength steel; Interacting stress concentration; Multi-crack initiation; Multiaxial fatigue; Surface metrology | Data: | 2021 | Editora: | MDPI | Projeto: | UIDB/00285/2020 DEC-10/2021/IDUB/IV.2/EUROPIUM |
Título da revista, periódico, livro ou evento: | Materials | Volume: | 15 | Número: | 1 | Resumo: | The present study evaluates the fracture surface response of fatigued 34CrNiMo6 steel bars with transverse blind holes subjected to bending with torsion loading. The analysis of the geometric product specification was performed by means of height parameters Sx, functional volume parameters Vx, and fractal dimension Df. Surface topography measurements were carried out using an optical profilometer with focus variation technology. The experimental results show that the doubling the bending to torsion moment ratio B/T from B/T = 1 to B/T = 2, maintaining the same normal stress amplitude, greatly reduces both Sa, Vv as well as the fractal dimension Df of the analyzed specimen fractures by 32.1%, 29.8%, and 16.0%, respectively. However, as expected, a two-fold increase in the B/T ratio, maintaining the same normal stress amplitude, resulted in a larger number of cycles to fatigue crack initiation, Ni, which can be explained by the lower shear stress level. These experiments prove that parameters Sx, Vx, Df are smaller for larger Ni values, which is an important finding. In addition, it was found a high consistency of surface topography measurements for the two sides of the broken specimens. The proposed methodology is both reliable and applicable for other engineering applications involving different geometries and loading conditions. © 2021 by the authors. Licensee MDPI, Basel, Switzerland. | URI: | https://hdl.handle.net/10316/96904 | ISSN: | 1996-1944 | DOI: | 10.3390/ma15010080 | Direitos: | openAccess |
Aparece nas coleções: | I&D CEMMPRE - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
materials-15-00080.pdf | 80.51 MB | Adobe PDF | Ver/Abrir |
Citações SCOPUSTM
9
Visto em 14/out/2024
Citações WEB OF SCIENCETM
9
Visto em 2/out/2024
Visualizações de página
107
Visto em 8/out/2024
Downloads
66
Visto em 8/out/2024
Google ScholarTM
Verificar
Altmetric
Altmetric
Este registo está protegido por Licença Creative Commons