31,153 Hits in 3.3 sec

Hardness Perception Based on Dynamic Stiffness in Tapping

Kosuke Higashi, Shogo Okamoto, Yoji Yamada, Hikaru Nagano, Masashi Konyo
2019 Frontiers in Psychology  
We found that the perceptual effect of dynamic stiffness depends on the frequency.  ...  In this study, we investigated the influence of the dynamic characteristics of vibrations on the hardness perceived by tapping.  ...  Figures 9A,B demonstrate that the dynamic stiffness of an object is an effective predictor of the hardness perceived by tapping.  ... 
doi:10.3389/fpsyg.2018.02654 pmid:30662422 pmcid:PMC6328787 fatcat:xblehopelraifminzhod5kc6ya

Experimental Study on the Lateral Resistance of Reinforced Glued-Laminated Timber Post and Beam Structures

Haibei Xiong, Yingyang Liu, Ya Yao, Bingyang Li
2017 Journal of Asian Architecture and Building Engineering  
Based on the observed experimental phenomena and the test results, the feasibility of the reinforcement was discussed; the contributions of different methods were evaluated; and the seismic performance  ...  Nine cyclic tests were conducted on full-scale one-story, one-bay timber post and beam construction specimens to study the lateral resistance of reinforced glued-laminated timber post and beam structures  ...  Li et al. (2013) conducted experiments on FRP columns to investigate the effects of different wrapping methods.  ... 
doi:10.3130/jaabe.16.379 fatcat:lt7jihp4czakhlkfcr7e4tmdbi

Numerical Simulations of Tap Test on Composite Structures

Sung Joon Kim
2018 International Journal of Acoustics and Vibration  
Arbitrarily supported boundary edges are modelled by elastic restraints, and the effects of boundary condition on tapping sound are discussed.  ...  In this work, the phenomenon of the tapping sound generation is modelled as sound radiation from the vibrating surface due to impact.  ...  ACKNOWLEDGEMENTS This study was supported by the 'Study on the light structure and structural integrity improvement technology' program funded by the National Research Council of Science & Technology,  ... 
doi:10.20855/ijav.2018.23.21381 fatcat:amudv3emznezzkslngeqjkyncm

Characterization of damages in materials by computer-aided tap testing

Imran Oral
2019 IOP Conference Series: Materials Science and Engineering  
The tap test is an easy and effective way of characterization of flaws and damages in different materials (especially honeycomb sandwich composites).  ...  When the tapping is carried out systematically to cover an area, the measured impact duration can be used for generating a "scan image" of the tapped area.  ...  Because that this is the first time that the effect of the electric and magnetic fields on the damage characterization and on tap test images is studied.  ... 
doi:10.1088/1757-899x/707/1/012019 fatcat:eb3e7hqy7rgwrire2xob3agopm

Research on the Distribution Rule of Percussion Response Pulse Width in Coin-Tap Test

Jian Li, Liping Xu, Xiaowen Yu, Jianjun Peng, Lei Huang, Chengwei Fei
2021 Shock and Vibration  
The coin-tap method performs nondestructive testing by measuring the width of the tapping response pulse on the surface of the material.  ...  width of the tapping response in the defective area.  ...  displacement w [21, 22] . erefore, the impact of shear deformation is ignored during the tapping process, and only the effect of bending deformation is considered. e effective stiffness of the round sheet  ... 
doi:10.1155/2021/5535687 fatcat:jfzdpoeztrdv5hhbhofw33sthy

Effect of microtitanium impregnated tape on the recovery of triceps surae musculotendinous function following strenuous running

Jonathan D Hughes, Philip W Fink, David F Graham, David S Rowlands
2013 SpringerPlus  
Altered neuromuscular control of tendon stiffness via dermal application of micro-titanium treated materials may facilitate restoration of musculotendinous contractile performance following prior strenuous  ...  The effects on ROM with AQUA TITAN (1.6%; ±2.0%) and placebo were trivial (−1.6% ±1.9%), but the small difference (3.1%; ±2.7%) possibly greater with AQUA TITAN.  ...  A sample size of 20 was estimated for the expected effect size on Achilles tendon stiffness based on effect size estimate drawn from change in plantarflexion ROM due to AQUA TITAN of 3.7% (effect size  ... 
doi:10.1186/2193-1801-2-653 pmid:24349956 pmcid:PMC3863395 fatcat:4vxqstoatbhbpoi3w2g7nxasvu

What is the Hardness Perceived by Tapping? [chapter]

Kosuke Higashi, Shogo Okamoto, Yoji Yamada
2016 Lecture Notes in Computer Science  
A human can perceive the hardness of an object by tapping its surface.  ...  We compared the ranked subjective hardness values and physical properties of objects, including their stiffness, viscosity, density, and Shore hardness, and the frequencies and time constants of the natural  ...  In a former study, we researched the effects of the mass, viscosity, and stiffness of virtual objects on hardness perception by tapping [5] .  ... 
doi:10.1007/978-3-319-42321-0_1 fatcat:m5yhugdn6nb7dmmzcb5pfyvudy

Enhancing the Functional and Environmental Properties of Asphalt Binders and Asphalt Mixtures Using Tourmaline Anion Powder Modification

Xiaorui Zhang, Xinxing Zhou, Xinquan Xu, Fan Zhang, Leilei Chen
2021 Coatings  
Compared to TAP at 3.95 pC/N, the piezoelectric constant of TAPMA was found to be 3.42 pC/N.  ...  This study was conducted to investigate the functional, piezoelectric, and thermoelectric properties of a TAP-modified asphalt binder (TAPMA) and the corresponding asphalt mixtures.  ...  Acknowledgments: Special thanks also go to all those who helped during this research study and writeup of this paper. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/coatings11050550 fatcat:zfgfmskk3jhghmfw2z2y56s4ru

Effect of Fatigue Testing and Aquatic Environment on the Tensile Properties of Glass and Kevlar Fibers Reinforced Epoxy Composites

Menail Y, Abderrahim EL Mahi
2015 Journal of Aeronautics & Aerospace Engineering  
Next, the tensile tests were made on the unaged and aged samples in order to determine the evolution of the strength and stiffness under local interactions of the water absorption and fatigue.  ...  This paper presents the experimental results of the influence of water ageing after mechanical fatigue on glassfiber composites, compared with Kevlar-fiber composites.  ...  In spite of these investigations, few works studied the combined effect of damage mechanics and environmental ageing on the ultimate properties of composite materials.  ... 
doi:10.4172/2168-9792.1000150 fatcat:ujunzqyr2jgeblgdgco7ujwc6a

Reality-based models for vibration feedback in virtual environments

A.M. Okamura, M.R. Cutkosky, J.T. Dennerlein
2001 IEEE/ASME transactions on mechatronics  
Virtual vibration models were developed from empirical vibration waveforms measured by tapping on real surfaces with the instrumented stylus of a three degree-of-freedom haptic display.  ...  Psychophysical experiments utilizing the display were performed to evaluate the realism of various vibration parameter values used in the vibration model.  ...  The experimental conditions for taking tapping data, including the type of stylus (material and shape) and the geometry of the material being tapped, also have an effect on the shape of the vibration waveforms  ... 
doi:10.1109/3516.951362 fatcat:5gwesroksrhrbjxvtpdflgw4vm

Effects of elastic and inelastic interactions on phase contrast images in tapping-mode scanning force microscopy

Javier Tamayo, Ricardo Garcı́a
1997 Applied Physics Letters  
Lett. 100, 223104 (2012) Effect of multiplicative noise on least-squares parameter estimation with applications to the atomic force microscope Rev. Sci.  ...  Design and performance of a combined secondary ion mass spectrometry-scanning probe microscopy instrument for high sensitivity and high-resolution elemental three-dimensional analysis Rev. Sci.  ...  We also considered the effect of adhesion energy hysteresis on phase shifts.  ... 
doi:10.1063/1.120039 fatcat:s2dwxasqbrhoxaytibup4vg6my

State feedback control for adjusting the dynamic behavior of a piezoactuated bimorph atomic force microscopy probe

Bilal Orun, Serkan Necipoglu, Cagatay Basdogan, Levent Guvenc
2009 Review of Scientific Instruments  
First, we first investigate the effect of feedback gains on dynamic response of the probe and then show that the time constant of the probe can be reduced by reducing its quality factor and/or increasing  ...  its resonance frequency to reduce the scan error in tapping mode AFM.  ...  We then investigate the effect of feedback gains on the scan speed, the tapping forces, and the image quality.  ... 
doi:10.1063/1.3142484 pmid:19566204 fatcat:s3zniqxpvvhrddcjgrkevrmhc4

Differential effects of mental load on proximal and distal arm muscle activity

Jules G. Bloemsaat, Ruud G. J. Meulenbroek, Gerard P. Van Galen
2005 Experimental Brain Research  
consequences of increased noise in the neuromotor system due to enhanced mental processing.  ...  effects of increased noise levels on performance.  ...  feedback on performance).  ... 
doi:10.1007/s00221-005-0066-2 pmid:16078028 fatcat:cmead57a55e2xl24x6elr3zhhy

Research Progress on Repair and Reinforcement of Beams in Timber Building

Xiaofeng Zhang, Youfu Sun, Mingbin Liu, Ruyuan Yang, H. Li, M. Ashraf, O. Corbi, P. Yang, L. Wang, I. Corbi
2019 MATEC Web of Conferences  
The "beam" is one of the most important components in the upper structure of a timber structure; beam as the main force component is under long-term loading may cause it to crack and resulting in a reduced  ...  Timber building has been widely used for its renewable, excellent structural performance and aesthetic value.  ...  effect on the component, but it is difficult to restore the overall working performance of the timber beam, and it is not an effective repair method.  ... 
doi:10.1051/matecconf/201927501019 fatcat:3kywvizjivdu7i2lzvzkmstbwq

Metal Sounds Stiffer than Drums for Ears, but Not Always for Hands: Low-Level Auditory Features Affect Multisensory Stiffness Perception More than High-Level Categorical Information

Juan Liu, Hiroshi Ando, Christian Friedrich Altmann
2016 PLoS ONE  
Furthermore, the data demonstrated that sounds with higher frequency and/or shorter decay time tended to be judged as stiffer, and contact sounds of stiff objects had no effect on the haptic perception  ...  Usually, the stiffness of an object is perceived haptically.  ...  First, the magnitude of the auditory effect on multisensory stiffness perception varied with the haptic stiffness level.  ... 
doi:10.1371/journal.pone.0167023 pmid:27902718 pmcid:PMC5130246 fatcat:rkom5id77vec3atd3fvd4hjae4
« Previous Showing results 1 — 15 out of 31,153 results