Results 271 to 280 of about 145,655 (304)

Single Cutter Impact Tests Investigate Deep-Well Hammer-Drilling Performance

Proceedings of SPE Annual Technical Conference and Exhibition, 2005
Abstract The use of a percussion hammer can provide high penetration rates through hard rocks when air drilling. The work of this paper was partly sponsored by the US Department of Energy to develop hammer drilling techniques for drilling deep hard rocks, using real drilling muds.
S. Green, A. Judzis, D. Curry, A. Black, U. Prasad, J. Rogers   +5 more
openaire   +1 more source

Fouling Detection based on Vibration Analysis with the Hammer Impact Test

2007 IEEE Instrumentation & Measurement Technology Conference IMTC 2007, 2007
Fouling detection is a persistent and relevant problem for the chemical, oil, food and pharmaceutical industries. The fouling process is the slow, unwanted layer deposition of heavy organic and other dissolved solid material out of transported fluids or suspensions onto inner wall surfaces in fluid transport system over an extended period of time. This
Jaidilson Jo da Silva, Antonio Marcus Nogueira Lima, Franz Helmut Neff, Jose Sergio da Rocha Neto   +3 more
openaire   +1 more source

Unbiased expression of FRF with exponential window function in impact hammer testing

Journal of Sound and Vibration, 2004
Abstract The exponential window function is widely used in impact hammer testing to reduce leakage errors as well as to get a nice S/N ratio. The larger the exponential decay rate of the window is, the more effectively the leakage errors are reduced.
Se Jin Ahn, Weui Bong Jeong, Wan Suk Yoo
openaire   +1 more source

A NEW APPROACH TO IMPACT TESTING INSTRUMENTATION USING AN ELECTRONIC SLAVE HAMMER

Mechanical Systems and Signal Processing, 1997
Abstract An electronic slave hammer is used to improve the performance of impact testing. The electronic programmer as well as the power electronic circuits are presented. The geometry of the piston tip of the hammer and on duration of contact between the tip and the structure is discussed.
I. Tawfiq, T. Vinh, T. Chouychai
openaire   +1 more source

Cracking Assessment of Reinforced Concrete Slab Using Impact Hammer Test

Journal of Structural Monitoring and Built Environment
Impact hammer test is a vibration-based monitoring method used to detect cracking or damage in concrete structures by observing the vibration behavior such as the natural frequency, mode shapes and damping ratio. Damage or cracks in the structure can cause structure failure.
Nuramieza Mohd Yazid, Nor Hayat Abd Ghafar   +1 more
openaire   +1 more source

Hot Spot Formation in Mock Materials in Impact Sensitivity Testing by Drop Hammer

Propellants, Explosives, Pyrotechnics, 2017
AbstractPowder and granulated sugars were exposed to the drop hammer impact test configured with 120‐ and 180‐grit Si/C sandpapers. The sugars were selected as mock materials for HMX (Octahydro‐1,3,5,7‐tetranitro‐1,3,5,7‐tetrazocine). The drop heights ranged from 24.2 to 40.7 cm.
John G. Reynolds, Peter C. Hsu, Gary A. Hust, Stephen A. Strout, H. Keo Springer   +4 more
openaire   +1 more source

Design of the angle hammers impact test system of the automobile fuel tank

2009 International Conference on Mechatronics and Automation, 2009
This paper introduces the design method of the angle hammers impact test system of the automobile fuel tank in detail. We have discovered the appropriate algorithm and have achieved the request precision through the computation of the data. We used the single chip of ATmega8 and a series of electronic elements to complete the control of the impact test
null Jiang Tao, null Zhong Shi, null Su Chengzhi   +2 more
openaire   +1 more source

Advanced Hammer Excitation Technique for Impact Modal Testing on Lightweight Materials Using Scalable Automatic Modal Hammer

Experimental Modal Analysis (EMA) on a lightweight material has proven to be very challenging in the recent past. The applications of these materials have increased invariably in various fields and so have a high demand for Research & Development (R&D). A lightweight material is very sensitive in terms of vibration.
Tarun Teja Mallareddy, Sarah Schneider, Peter G. Blaschke   +2 more
openaire   +1 more source

Assessment of Railway Substructures using Impact Hammer Testing

Civil-Comp Proceedings, 2016
E. Balic, C. McNally
openaire   +1 more source

Pendulum Impact Hammer Tests on Spruce Glued Laminated Timber - Preliminary Results

Civil-Comp Conferences, 2023
A.S. Cao, M. Lolli, A. Frangi
openaire   +1 more source