Search Results - "Kaufmann, G.H."

Fast electro-optical system for pulsed ESPI carrier fringe generation by Davila, A., Kerr, D., Kaufmann, G.H.

“…Pulsed Electronic Speckle Pattern Interferometry (ESPI) offers the possibility of analysing fast transient phenomena in experimental mechanics. However, due to…”
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Simulation of dynamic speckle sequences and its application to the analysis of transient processes by Federico, A., Kaufmann, G.H., Galizzi, G.E., Rabal, H., Trivi, M., Arizaga, R.

“…Dynamic speckle has been used in recent years to analyse several transient processes that are produced in industrial and biological applications. We present…”
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Accuracy and sensitivity of a hole drilling and digital speckle pattern interferometry combined technique to measure residual stresses by Viotti, M.R., Kaufmann, G.H.

“…This paper reports on the accuracy and sensitivity of digital speckle pattern interferometry (DSPI) when it is combined with the hole drilling technique for…”
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Determination of residual stresses using hole drilling and digital speckle pattern interferometry with automated data analysis by Dı́az, F.V, Kaufmann, G.H, Galizzi, G.E

“…A digital speckle pattern interferometry and hole drilling combined system is developed to determine the magnitude of the residual stress in a aluminum thin…”
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Accelerated aging studies of distribution transformers containing naphthenic and paraffinic mineral oils by Fessler, W.A., Kaufmann, G.H., Rouse, T.O.

“…To evaluate the behavior of paraffinic oils in long term service in transformers, twenty-eight oil-filled 25KVA distribution transformers were subject to…”
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Measurement of sub-surface delaminations in carbon fibre composites using high-speed phase-shifted speckle interferometry and temporal phase unwrapping by Davila, A, Ruiz, P.D, Kaufmann, G.H, Huntley, J.M

“…A high-speed phase-shifted speckle interferometer has been developed recently for studying dynamic events. Speckle interferograms are continuously recorded by…”
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Nondestructive evaluation of the fatigue damage accumulation process around a notch using a digital image measurement system by Dı́az, F.V., Armas, A.F., Kaufmann, G.H., Galizzi, G.E.

“…The fatigue damage accumulation process around a notch is studied using a noncontact digital image measurement system. This system incorporates a contrast…”
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Optical measurement of the plastic zone size in a notched metal specimen subjected to low-cycle fatigue by Dı́az, F.V, Kaufmann, G.H, Armas, A.F, Galizzi, G.E

“…This paper describes an optical method used for the determination of the plastic zone size generated on the surface of a notched metal specimen under…”
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Evaluation of impact-induced transient deformations using double-pulsed electronic speckle pattern interferometry and finite elements by Ruiz, P.D, Kaufmann, G.H, Möller, O, Galizzi, G.E

“…Transient out-of-plane displacements generated in a steel cantilever beam by an impact load are measured using a double-pulsed electronic speckle pattern…”
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Measurement of the near-tip displacement field in a fatigue damaged steel plate by digital speckle pattern interferometry by Dı́az, F.V., Kaufmann, G.H., Armas, A.F., Möller, O.

“…A digital speckle pattern interferometry system with automatic data analysis is used to measure the near-tip in-plane displacement field in a stainless steel…”
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An Evaluation of Synthetic Aperture Radar Noise Reduction Techniques for the Smoothing of Electronic Speckle Pattern Interferometry Fringes by Davila, A., Kaufmann, G.H., Kerr, D.

“…Test objects with different surface reflection properties produce local partial decorrelation in electronic speckle pattern interferometry (ESPI) fringe…”
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Evaluation of a method to determine interferometric phase derivatives by Kaufmann, G.H., Galizzi, G.E.

“…A recently published method for the determination of phase derivatives maps by direct manipulation of three or more phase-shifted interferograms is tested for…”
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Holographic interferometry applied to the study of residual deformations induced by a pulsed ion implanter by Kaufmann, G.H., Brühl, S.P., Feugeas, J.N.

“…The application of holographic interferometry to study the residual deformations induced in steel specimens by a pulsed ion implanter is presented. The…”
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Evaluation of Residual Deformations in Ion Implanted Steel Plates by Means of Tv Holography by Kaufmann, G.H., Díaz, F.V., Galizzi, G.E.

“…It was recently shown that pulsed ion accelerators can provide relatively deep and uniform implantation profiles required to improve tribological properties of…”
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Evaluation of residual deformations generated by a pulsed ion implanter using interferometric phase measurement by Kaufmann, G.H., Brühl, S.P., Galizzi, G.E., Feugeas, J.N.

“…A Fourier transform method of holographic fringe pattern analysis is applied to measure surface residual deformations generated by a pulsed ion implanter. The…”
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RESIDUAL-DEFORMATION EVALUATION USING SPECKLE PHOTOGRAPHY by Kaufmann, G.H., Baumann, G.E.

“…To evaluate the capability of the speckle technique, an Al alloy with a radial residual stress was tested. The specimen consisted of a square plate with a…”
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Gas Bubbles In Distribution Transformers by Kaufmann, G.H.

“…Gas bubbles are known to have a deleterious effect on the dielectric strength of transformer oil. The possibility that such bubbles may develop in oil-filled…”
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Impulse testing of distribution transformers under load by Kaufmann, G.H.

“…The paper describes a new functional test procedure for evaluating the impulse strength of distribution transformers under service-related conditions,…”
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Gas Bubble Studies and Impulse Tests on Distribution Transformers During Loading Above Nameplate Rating by Kaufmann, G.H., McMillen, C.J.

“…The paper describes the results of studies on gas bubble evolution in model coils, and impulse breakdown tests on full-size distribution transformers during…”
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Evaluation of a Functional Life Test Model for Power Transformers by McNutt, W. J., Kaufmann, G. H.

“…A power transformer life model and its related, test procedure have been evaluated and found to provide more meaningful information on retained operational…”
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