Results 11 to 20 of about 224,379 (314)

Comparison between Destructive and Non-Destructive Test on Concrete [PDF]

open access: yesEurasian Journal of Science and Engineering, 2017
Compression strength is the most important factor in concrete structures, and there are two methods to evaluate that compressive strength, destructive and non-destructive method.
Junaid Kameran Ahmed   +1 more
doaj   +1 more source

Fatigue Damage Evaluation of Compressor Blade Based on Nonlinear Ultrasonic Nondestructive Testing

open access: yesJournal 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

An Ultrasonic Sensor for Distance Measurement in Automotive Applications [PDF]

open access: yes, 2001
This paper describes an ultrasonic sensor that is able to measure the distance from the ground of selected points of a motor vehicle. The sensor is based on the measurement of the time of flight of an ultrasonic pulse, which is reflected by the ground. A
Carullo, Alessio, Parvis, Marco
core   +1 more source

An ultrasonic technique for the measurement of elastic properties of soft surface coatings [PDF]

open access: yes, 2006
The properties of thin layers of materials can be different from those in the bulk form. The response of a coating to any given load and its ability to remain bonded to the substrate will depend on its elastic modulus and Poisson's ratio. In this study a
Drinkwater   +8 more
core   +1 more source

Correlation Analysis between Strength and Defect of Nano-Cementitious Composites using Ultrasonic Pulse Velocity

open access: yesNanomaterials, 2023
Recently, researchers are conducting studies to improve the mechanical and chemical properties of cementitious composites mixed with nanomaterials.
Yangsub Shin   +3 more
doaj   +1 more source

Optimization Milling Force and Surface Roughness of Ti-6Al-4V Based on Ultrasonic-Assisted Milling (UAM): An Experimental Study

open access: yesMicromachines, 2023
This study aimed to develop a longitudinal ultrasonic-assisted milling system to investigate the machinability of titanium (Ti) Alloy Ti-6Al-4V (TC4).
Qingqing Lü   +5 more
doaj   +1 more source

Ultrasonic fatigue testing of concrete

open access: yesUltrasonics, 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.
Fitzka, Michael   +6 more
openaire   +3 more sources

The effect of ultrasonic vibration on stress-strain relations during compression tests of aluminum alloys

open access: yesJournal of Materials Research and Technology, 2020
Complete understanding of ultrasonic interaction with aluminum alloys is essential to promote application of ultrasonic-assisted friction stir welding process in manufacturing industry.
Junjie Zhao, Hao Su, Chuansong Wu
doaj   +1 more source

Setting control of completely recyclable concrete with slag and aluminate cements [PDF]

open access: yes, 2016
A completely recyclable concrete (CRC) is designed to have a chemical composition equivalent to the one of general raw materials for cement production. By doing so, this CRC can be used at the end of its service life in cement manufacturing without the ...
De Belie, Nele   +3 more
core   +2 more sources

Biofuels drying process efficiency research / Biokuro džiovinimo proceso efektyvumo tyrimai

open access: yesMokslas: Lietuvos Ateitis, 2013
The paper deals with biofuel drying process efficiency opportunities.Research was carried out with a special stand and performingexperiments. Experimental rig consists of an ultrasonic generator,ultrasonic transducer, a drying chamber and the humidity ...
Osvaldas Šlepikas, Audrius Čereška
doaj   +1 more source

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