Results 31 to 40 of about 57,753 (299)

Photoacoustic generation of focused quasi-unipolar pressure pulses [PDF]

, 2010
The photoacoustic effect was employed to generate short-duration quasi-unipolar acoustic pressure pulses in both planar and spherically focused geometries.
Maslov, Konstantin, Wang, Lihong V., Zhang, Hao F.   +2 more
core   +1 more source

Comparatively Study of Non-Destructive test with different methods in various curing days [PDF]

E3S Web of Conferences
In non-destructive testing, materials, components, or assemblies are inspected, tested, or evaluated without being destroyed. In nondestructive testing, materials, components, and assemblies are evaluated for quality and integrity without damaging them ...
Pahade Chandramohan, Parmar Umang, Salaam Ahmed, Rao D S N M, Manjunatha, Singla Atul, Rambabu Gottipati Venkata   +6 more
doaj   +1 more source

Statistical Equations to Estimate the In-situ Concrete Compressive Strength from Non-destructive Tests

Journal of Engineering, 2018
The aim of this study is to propose reliable equations to estimate the in-situ concrete compressive strength from the non-destructive test. Three equations were proposed: the first equation considers the number of rebound hummer only, the second equation
Ahmed Faleh Al-Bayati
doaj   +1 more source

Density and Ultrasonic Pulse Velocity Investigation of Self-Compacting Carbon Fiber- Reinforced Concrete [PDF]

Engineering and Technology Journal, 2018
comprehensive research has been carried out to understand the effect of adding carbon fibers to density and ultrasonic pulse velocity of self-compacting concrete.
G.A. Salman
doaj   +1 more source

Correlation between Uniaxial Compression Test and Ultrasonic Pulse Rate in Cement with Different Pozzolanic Additions

Applied Sciences, 2021
This work aims to study the relationship between the compression resistance and velocity from ultrasonic pulses in samples of mortars with 25% of pozzolanic content.
Leticia Presa, Jorge L. Costafreda, Domingo Alfonso Martín   +2 more
doaj   +1 more source

Acoustical Ranging Techniques in Embedded Wireless Sensor Networked Devices [PDF]

, 2013
Location sensing provides endless opportunities for a wide range of applications in GPS-obstructed environments; where, typically, there is a need for higher degree of accuracy.
Jha, Sanjay, Kottege, Navinda, Kusy, Branislav, Misra, Prasant, Ostry, Diethelm   +4 more
core   +2 more sources

Reliability of using nondestructive tests to estimate compressive strength of building stones and bricks

Alexandria Engineering Journal, 2012
This study aims to investigate the relationships between Schmidt hardness rebound number (RN) and ultrasonic pulse velocity (UPV) versus compressive strength (fc) of stones and bricks.
Ali Abd Elhakam Aliabdo, Abd Elmoaty Mohamed Abd Elmoaty   +1 more
doaj   +1 more source

Local Defect Resonance (LDR): A Route to Highly Efficient Thermosonic and Nonlinear Ultrasonic NDT [PDF]

, 2014
Conference ...
Solodov
core   +1 more source

Ultrasonic pulse velocity and physical properties of hybrid composites: A statistical approach

Hybrid Advances, 2023
This work describes the correlations between the ultrasonic pulse velocity (UPV) and physical properties of fibrous-particulate hybrid composites made of glass/carbon fabrics and three different micro-inclusions such as silica particles, recycled carbon ...
Sergio Luiz Moni Ribeiro Filho, Carlos Thomas, Luís Miguel Pereira Durão, André Luis Christoforo, Chris Bowen, Fabrizio Scarpa, Tulio Hallak Panzera   +6 more
doaj   +1 more source

Wind Energy and the Turbulent Nature of the Atmospheric Boundary Layer [PDF]

, 2012
Wind turbines operate in the atmospheric boundary layer, where they are exposed to the turbulent atmospheric flows. As the response time of wind turbine is typically in the range of seconds, they are affected by the small scale intermittent properties of
Allan Morales, Castaing B., Frisch U., Günther H., Hendrik Heißelmann, International Electrotechnical Commission (IEC), Joachim Peinke, Jonkman J., Kang H. S., Kleinhans D., Kleinhans D., Knebel P., Körber F., Malcolm D. J., Matthias Wächter, Michael Hölling, Milan P., Milan P., Muzy J.F.m.c., Nico Reinke, Nielsen M., Patrick Milan, Philip Rinn, Tanja Mücke, Wächter M., Øye S.   +25 more
core   +1 more source