Publication detail
Reconstruction and Evaluation of 3D Fracture Surface Morphology
SLÁMEČKA, K. POKLUDA, J. PONÍŽIL, P. ŠANDERA, P.
Czech title
Rekonstrukce a hodnocení 3D morfologie únavových lomových povrchů
English title
Reconstruction and Evaluation of 3D Fracture Surface Morphology
Type
conference paper
Language
en
Original abstract
In the paper a procedure for evaluation of the fracture surface morphology is described in detail. It consists of the stereophotogrammetrical 3D surface reconstruction followed by the Delaunay triangulation of obtained set of surface points. The potential of the procedure is demonstrated using fracture surfaces generated under combined bending-torsion fatigue loading of specimens made from highstrength low-alloy Cr-Al-Mo steel. Fracture profiles extracted from calculated 3D meshes are characterized by the root mean square roughness and the Hurst exponent. As a main result of the analysis the critical portion of the torsion loading component after which the character of the crack path changes rapidly is estimated to be approximately 50%.
Czech abstract
V článku je detailně popsána metodika hodnocení morfologie únavových lomů. Metoda je založena na stereofotogrammetrické 3D rekonstrukci a následné Delaunayově triangulaci získané množiny povrchových bodů. Efektivita procedury je demonstrována na hodnocenílomových povrchů generovaných kombinací krutu a ohybu na vzorcích vysocepevné nízkolegované oceli Cr-Al-Mo. Lomové profily extrhované z vypočtené sítě jsou charakterizovány pomocí střední drsnosti a Hurstova exponentu. Hlavním výsledkem analýzy je zjištění kritické hodnoty 50% podílu torzní komponenty, nad níž se dramaticky mění lomová trajektorie.
English abstract
In the paper a procedure for evaluation of the fracture surface morphology is described in detail. It consists of the stereophotogrammetrical 3D surface reconstruction followed by the Delaunay triangulation of obtained set of surface points. The potential of the procedure is demonstrated using fracture surfaces generated under combined bending-torsion fatigue loading of specimens made from highstrength low-alloy Cr-Al-Mo steel. Fracture profiles extracted from calculated 3D meshes are characterized by the root mean square roughness and the Hurst exponent. As a main result of the analysis the critical portion of the torsion loading component after which the character of the crack path changes rapidly is estimated to be approximately 50%.
Keywords in Czech
Morfologie únavového lomu, vysocepevná ocel, únava v ohybu-krutu.
Keywords in English
Fatigue fracture morphology, high-strength steel, bending-torsion fatigue.
RIV year
2007
Released
17.01.2007
ISBN
0-9717880-3-0
Book
Advances in Computational & Experimental Engineering and Sciences
Pages from–to
1507–1513
Pages count
7
BIBTEX
@inproceedings{BUT27922,
author="Karel {Slámečka} and Jaroslav {Pokluda} and Petr {Ponížil} and Pavel {Šandera},
title="Reconstruction and Evaluation of 3D Fracture Surface Morphology",
booktitle="Advances in Computational & Experimental Engineering and Sciences",
year="2007",
month="January",
pages="1507--1513",
isbn="0-9717880-3-0"
}