Results 1 to 10 of about 11,298 (262)
Ultrasonic fatigue testing of concrete
Ultrasonics, 2021 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 generation of very high cycle fatigue (VHCF) data of concrete.
Michael Fitzka +2 more
exaly +4 more sources
Wireless Ultrasonic Sensing for Fatigue Crack Propagation and Life Prediction in Thin Plate Structures [PDF]
SensorsRecent advancements in sensor technology have made in-situ crack assessment of structures feasible. To investigate the correlation between the ultrasonic amplitude and metal fatigue life, an aluminum compact tension (C(T)) specimen was fabricated to ...
Shuo Chen +4 more
doaj +2 more sources
Ultrasonic Fatigue Testing in the Tension-Compression Mode. [PDF]
J Vis Exp, 2018 Ultrasonic fatigue testing is one of a few methods which allow investigating fatigue properties in the ultra-high cycle region. The method is based on exposing the specimen to longitudinal vibrations on its resonance frequency close to 20 kHz. With use of this method, it is possible to significantly decrease the time required for the test, when ...
Trško L, Nový F, Bokůvka O, Jambor M.
europepmc +4 more sources
Self-Sensing Nonlinear Ultrasonic Fatigue Crack Detection under Temperature Variation † [PDF]
Sensors, 2018 This paper proposes a self-sensing nonlinear ultrasonic technique for fatigue crack detection under temperature variations. Fatigue cracks are identified from linear (α) and nonlinear (β) ultrasonic parameters recorded by a self-sensing ...
Namgyu Kim, Keunyoung Jang, Yun-Kyu An
doaj +2 more sources
Design Theory and Experimental Research of Ultrasonic Fatigue Test
Machines, 2022 Ultrasonic fatigue testing is a key technology that is more efficient and energy saving compared to conventional fatigue testing. In order to investigate the behavior of metallic materials at ultra-high frequencies and to verify the validity of ...
Ning Feng +5 more
doaj +1 more source
Fatigue Damage Evaluation of Compressor Blade Based on Nonlinear Ultrasonic Nondestructive Testing
Journal of Marine Science and Engineering, 2021 Nonlinear ultrasonic testing is highly sensitive to micro-defects and can be used to detect hidden damage and defects inside materials. At present, most tests are carried out on specimens, and there are few nonlinear ultrasonic tests for fatigue damage ...
Pengfei Wang +4 more
doaj +1 more source
Dynamic frequency-dependent fatigue damage in metals: A state-of-the-art review
Forces in Mechanics, 2023 Ultrasonic high-frequency fatigue testing differs from conventional low-frequency fatigue testing in strain rate and cyclic loading. Ultrasonic fatigue has a resonance frequency of 20,000 Hz and a load frequency below 100 Hz. A large change in cycles per
Kamin Tahmasbi +3 more
doaj +1 more source
Results in Physics, 2023 In order to investigate the fatigue behavior of carbon fiber composites and the influence of different stress levels on their fatigue damage characteristics, the fatigue experiments of carbon fiber composites under different stress ratios are carried out.
Silong Quan, Yuhua Zhang, Peishan Lin
doaj +1 more source
Heat Dissipation Behavior of a Low-Strength-Steel Welded Joint in Ultrasonic Fatigue
Metals, 2022 The coupled effects of heat and frequency in very-high-cycle fatigue are known under ultrasonic testing, while the heat dissipation behavior of welded joints is less investigated.
Jiang-Tao Hu +5 more
doaj +1 more source
Research on Fatigue Damage in High-Strength Steel (FV520B) Using Nonlinear Ultrasonic Testing
Shock and Vibration, 2020 In view of the early fatigue damage of high-strength steel FV520B, a nonlinear ultrasonic detection was performed on two types of fatigue samples using nonlinear Lamb waves.
Bingbing Chen +4 more
doaj +1 more source