Results 31 to 40 of about 52,181 (311)

Interaction of laser generated ultrasonic waves with wedge-shaped samples [PDF]

, 2012
Wedge-shaped samples can be used as a model of acoustic interactions with samples ranging from ocean wedges, to angled defects such as rolling contact fatigue, to thickness measurements of samples with non-parallel faces.
A. R. Clough, Achenbach J. D., Alterman Z., B. Dutton, Blitz J., Fujii K., R. S. Edwards, Scruby C. B.   +7 more
core   +1 more source

Review of Multiaxial Testing for Very High Cycle Fatigue: From ‘Conventional’ to Ultrasonic Machines

Machines, 2020
Fatigue is one of the main causes for in service failure of mechanical components and structures. With the development of new materials, such as high strength aluminium or titanium alloys with different microstructures from steels, materials no longer ...
Pedro Costa, Richard Nwawe, Henrique Soares, Luís Reis, Manuel Freitas, Yong Chen, Diogo Montalvão   +6 more
doaj   +1 more source

An ultrasonic approach for contact stress mapping in machine joints and concentrated contacts [PDF]

, 2004
The measurement of pressure at a contact in a machine part is important because contact stresses frequently lead to failure by seizure, wear or fatigue.
Drinkwater, B.W., Dwyer-Joyce, R.S., Lewis, R., Marshall, M.B.   +3 more
core   +1 more source

Prediction of Fatigue Damage Evolution in 3D-Printed CFRP Based on Ultrasonic Testing and LSTM

Applied Sciences
To address the prediction of fatigue damage for 3D-printed Carbon Fiber Reinforced Polymer (CFRP), this study used 3D-printing technology to fabricate CFRP specimens. Through multi-stage fatigue testing, samples with varying porosity levels were obtained.
Erzhuo Li, Sha Xu, Hongqing Wan, Hao Chen, Yali Yang, Yongfang Li   +5 more
doaj   +1 more source

Optimization of ultrasonic rolling parameters act on thread root and its influence on the fatigue life of bolts [PDF]

ITM Web of Conferences
Due to the large stress concentration at the root of the external thread, fatigue failure is apt to occur when subjected to alternating loads. In present study, to improve the fatigue resistance of threaded components, an ultrasonic rolling method was ...
Liu Xuanyu, Li Lei, Kang Haonan, Zheng Xiaodong   +3 more
doaj   +1 more source

Very High Cycle Fatigue Behavior of Austenitic Stainless Steels with Different Surface Morphologies

Metals, 2022
The fatigue behavior of the two austenitic stainless steels AISI 904L and AISI 347 with different surface morphologies, (i) conventionally turned and finally polished, (ii) cryogenic turned using CO2 snow, as well as (iii) cryogenic turned and finally ...
Marek Smaga, Annika Boemke, Dietmar Eifler, Tilmann Beck   +3 more
doaj   +1 more source

Characterisation of contact pressure distribution in bolted joints [PDF]

, 2006
The quantification of contact area and pressure distribution in a bolted joint is essential information, as it determines the integrity of the coupling. Current bolted joint design standards are based on analytical solutions of the pressure distribution,
Arakawa, Drinkwater, Fernlund, Gould, Greenwood, Ito, Kendall, Krautkrämer, Sawa, Shigley, Tattersall, Ziada   +11 more
core   +1 more source

On the Specimen Design, Physical Properties and Geometry Effect on Heat Generation and Thermal Gradient in Ultrasonic Fatigue

Machines
Performing fatigue characterisation is often an expensive task, being both time consuming and expensive. Taking that into account, ultrasonic fatigue testing is an interesting solution, since it can be thousands of times faster than traditional ...
Felipe Klein Fiorentin, Rita Dantas, Jorge Wolfs Gil, Andrea Piga Carboni, Thiago Antonio Fiorentin, Abílio Manuel Pinho de Jesus   +5 more
doaj   +1 more source

Fatigue cracks detected and measured without test interruption [PDF]

, 1966
Ultrasonic flaw detector records cracks in materials undergoing fatigue tests, without interfering with test progress.
Freche, J. C., Klima, S. J., Lesco, D. J.   +2 more
core   +1 more source

Measurement of interface pressure in interference fits [PDF]

, 2005
When components such as bearings or gears are pressed onto a shaft, the resulting interference induces a pressure at the interface. The size of this pressure is important as many components fail because fatigue initiates from press-fit stress ...
Dwyer-Joyce, R.S., Lewis, R., Marshall, M.B.   +2 more
core   +1 more source