Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Ulrike Karr"'
Publikováno v:
Metals, Vol 12, Iss 7, p 1113 (2022)
Inclusion-initiated fracture in high-strength spring steel is studied for axial and torsion very high cycle fatigue (VHCF) loading at load ratios of R = −1, 0.1 and 0.35. Ultrasonic S-N tests are performed with SWOSC-V steel featuring intentionally
Externí odkaz:
https://doaj.org/article/a0e43df3634d4858af1e93ef84f98161
Publikováno v:
Holzforschung. 76:977-984
Solid birch wood (Betula pendula) was investigated with a newly developed ultrasonic resonance test set-up enabling accelerated fully reversed fatigue experiments of wood. Ultrasonic fatigue lifetimes were measured at a cycling frequency of about 20
Publikováno v:
Fatigue & Fracture of Engineering Materials & Structures. 44:2356-2371
Autor:
Ulrike Karr, Herwig Mayer, Bernd M. Schönbauer, Eichi Tamura, M. Fitzka, Shogo Murakami, Sandaiji Yusuke
Publikováno v:
International Journal of Fatigue. 122:199-207
The influence of inclusions on cyclic torsion very high cycle fatigue (VHCF) is studied at different load ratios. Testing material is a high-strength spring steel, which was prepared based on the SWOSC–V composition with intentionally increased num
Autor:
Ulrike Karr, Tomáš Melichar, Maximilian Granzner, Alfred Strauss, Herwig Mayer, M. Fitzka, Martin Rödhammer
Publikováno v:
ULTRASONICS. 2021, vol. 116, issue 1, p. 1-10.
Cyclic compression fatigue properties of concrete are studied with the ultrasonic fatigue testing method with cycling frequency 19 kHz and are compared to servo-hydraulic tests performed at 60 Hz. Ultrasonic testing was found applicable for rapid gen
Publikováno v:
Fatigue & Fracture of Engineering Materials & Structures. 41:1938-1947
Publikováno v:
Materials Testing. 59:438-444
The ultrasonic fatigue testing method has been further developed to perform cyclic compression tests with concrete. Cylindrical specimens vibrate in resonance at a frequency of approximately 20 kHz with superimposed compressive static loads. The high
Publikováno v:
Composites Science and Technology. 141:130-136
At present the fatigue behaviour of glass fibre reinforced plastics (GFRP) and the corresponding failure mechanisms are rarely investigated in the very high cycle fatigue (VHCF) regime. This is due to a lack of testing equipment fitted to the specifi
Publikováno v:
International Journal of Fatigue. 93:309-317
The very high cycle fatigue (VHCF) properties of shot-peened VDSiCr spring steel have been investigated with the ultrasonic fatigue testing method. Fatigue behaviour under cyclic torsion and cyclic tension loading at load ratios between R = −1 and
Publikováno v:
International Journal of Fatigue. 142:105963
High and very high cycle fatigue (VHCF) tests were performed with 17-4PH stainless steel under constant amplitude (CA) and variable amplitude (VA) loading at load ratios of −1 and 0.05. Stepwise (duplex) S-N curves were determined with failure from