Results 31 to 40 of about 215,249 (299)

THE STUDY OF ROAD PAVEMENT PERFORMANCE THROUGH IMPACT HAMMER TESTS

International Conference “Environmental Engineering”, 2020
Noise pollution has become an important issue. One of the main sources of noise in residential areas is represented by transportation and by the interaction between tyre and road surface. Several studies illustrate that traffic noise is affected by road properties such as acoustic absorption, surface texture, and mechanical impedance.
Filippo Giammaria Pratico, Gianfranco Pellicano, Rosario Fedele   +2 more
openaire   +3 more sources

2-D strength prediction of single-row multi-bolted joints woven fabric kenaf composites [PDF]

, 2018
Implementation of multi-bolts arrangements in structures connections are commonplace in steel design to allow for joint efficiency and stronger connections.
Ahmad, Hilton@Mohd Hilton, Supar, Khairi
core   +1 more source

Impact noise test method using a modified hammer machine [PDF]

The Journal of the Acoustical Society of America, 1975
The current national (ASTM E-492) and international (ISO-R140/R717) impact method involves the use of a standard hammer machine for evaluating the impact noise isolation of floor/ceiling structure. The method has been severely criticized on the ground that ratings based on the test data correlate poorly with the subjective judgments of people listening
openaire   +1 more source

New tools for structural testing - Piezoelectric impact hammers and acceleration rate sensors [PDF]

35th Aerospace Sciences Meeting and Exhibit, 1997
Small-sizeultra-high-precision mechanical systems demand special testing methodologies, such as a betterhighfrequency response, a precise impact position, an extremely high repeatability, etc. Utilizing the fact that signals obtained from piezoelectric sensing elements are strongly ine uenced by the interfacing circuitry, piezoelectric sensors that can
C. Lee, C. Lin, C. Hsiao, W. Liaw, C. Lee, C. Lin, C. Hsiao, W. Liaw   +7 more
openaire   +2 more sources

A vignette model for distributed teaching and learning [PDF]

, 1998
Computer software and telecommunication technologies are being assimilated into the education sector. At a slower pace, educational methodologies have been evolving and gradually adopted by educators.
Chaloupka, Marcel, Koppi, Tony
core   +3 more sources

Estimation of the normal contact stiffness for frictional interface in sticking and sliding conditions [PDF]

, 2019
Modeling of frictional contact systems with high accuracy needs the knowledge of several contact parameters, which are mainly related to the local phenomena at the contact interfaces and affect the complex dynamics of mechanical systems in a prominent ...
Baillet, L., Berthier, Y., Massi, F., Salipante, M., Tonazzi, D.   +4 more
core   +1 more source

On an Impact Testing Machine of Drop Hammer Type

journal of the Japan Society for Testing Materials, 1961
In order to research on the behaviors of destruction of carbon steel forgings by impact bending, we designed an impact testing machine of drop hammer type. The total height of this testing machine is about 5m. The weights of the used drop hammers are 12.5, 25 and 50kg respectively. The maximum distance from the position of test piece to the drop hammer
Sadatoshi INADA, Koichi AKIZONO, Koji HANAOKA   +2 more
openaire   +2 more sources

An experimental study of impact performance of RC piers with different reinforcement ratios

Građevinar, 2019
The most advanced domestic super-high drop hammer impact test system was used in this study to simulate ship-piers collisions. The main focus of this study was to examine the impact forces, displacements, and strain time histories of five reinforced ...
Xiwu Zhou, Runcheng Zhang, Kai Zhao, Guoxue Zhang, Benying Wu   +4 more
doaj   +1 more source

The Hubble sequence: just a vestige of merger events? [PDF]

, 2009
Abr: We investigate whether the Hubble sequence can be reproduced by the relics of merger events. We verify that, at zmed=0.65, the abundant population of anomalous starbursts is mainly linked to the local spirals.
Alonso-Herrero, Barnes, Barnes, Barnes, Bell, Bell, Berentzen, Brinchmann, Brown, Bruzual, Carignan, Conselice, Conselice, Davidge, Davies, Dekel, Donner, E. Athanassoula, Eggen, Erb, F. Hammer, Fall, Flores, Gao, Gerin, Goldreich, Goldreich, Governato, H. Flores, Hammer, Hammer, Hammer, Hammer, Hammer, Heckman, Hopkins, Hopkins, Hopkins, Ibata, Jiang, Jogee, Kennicutt, Kroupa, Liang, Lilly, Lotz, Lotz, M. Puech, M. Rodrigues, Maller, Maller, Maraston, Marcillac, Mo, Mouhcine, Nakamura, Neff, Neichel, Noguchi, Peebles, Peirani, Poggianti, Puech, Puech, Puech, Puech, Puech, R. Delgado, Ravikumar, Rawat, Rawat, Robaina, Robertson, Rodrigues, Ryan, Schiminovich, Sheth, Silk, Springel, Springel, Steinmetz, Steinmetz, Stewart, Toomre, Toth, Tutukov, van den Bergh, Van den Bergh, White, Y. B. Yang, Yang, Yang, Zheng   +92 more
core   +3 more sources

Simulation and Experimental Study of Strain Distribution in Composite Materials Considering Impact Velocity and Impact Location

Aerospace
Fiber-reinforced composite panels have become the primary load-bearing structures in aircraft due to their exceptional stiffness, specific strength, and mechanical properties.
Aibing Qian, Hao Dong, Kang Cao, Yongjie Zhang   +3 more
doaj   +1 more source