Results 91 to 100 of about 7,364 (219)

Direct strain and slope measurement using 3D DSPSI [PDF]

open access: yes, 2013
This communication presents a new implementation of DSPSI. Its main features are 1. an advanced model taking into account the beam divergence, 2. the coupling with a surface shape measurement in order to generalize DSPSI to nonplanar surfaces 3.
Dandach, Wajdi   +2 more
core   +2 more sources

INVESTIGATION OF THE MECHANICAL INTERACTIONS AT THE INTERFACE OF WOOD-CEMENT COMPOSITES BY MEANS OF ELECTRONIC SPECKLE PATTERN INTERFEROMETRY

open access: yesBioResources, 2012
This study investigates the bonding behaviour of Norway spruce wood strands to a surrounding cement matrix. Effects of wood swelling and shrinking during cement curing were studied by using strands of various thicknesses.
Stephan Frybort,   +3 more
doaj  

Laser interferometric measurement of ion electrode shape and charge exchange erosion [PDF]

open access: yes
A projected fringe profilometry system was applied to surface contour measurements of an accelerator electrode from an ion thrustor. The system permitted noncontact, nondestructive evaluation of the fine and gross structure of the electrode.
Macrae, Gregory S., Mercer, Carolyn R.
core   +1 more source

A Full-Field Wideband Modal Testing Method for Turbine Blades

open access: yesAerospace
In order to accurately measure the low- and high-order modes of turbine blades, this study proposes a method that integrates piezoelectric ceramic excitation with time-averaged electronic speckle pattern interferometry (TA-ESPI).
Yinhang Ma   +4 more
doaj   +1 more source

The High Angular Resolution Multiplicity of Massive Stars

open access: yes, 2008
We present the results of a speckle interferometric survey of Galactic massive stars that complements and expands upon a similar survey made over a decade ago.
Alzner   +150 more
core   +1 more source

Localization of damage in beams using interferometric techniques [PDF]

open access: yes, 2012
Two interferometric techniques and their applications in structural damage identification are presented in this paper. Out-of-plane displacement fields of modal response are measured with a pulsed electronic speckle pattern interferometric system(ESPI).
Lopes, H.   +3 more
core  

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