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Nondestructive testing methods as stress screening facilities

: Greubel, D.; Meinlschmidt, P.; Mehlhorn, L.

Institute of Environmental Sciences and Technology -IEST-, Mt. Prospect/Ill.:
Today's training for tomorrow's world. Contamination control, design, test and evaluation, product reliability. 45th Annual Technical Meeting. Proceedings
Mount Prospect, Ill.: IEST, 1999
ISBN: 1-87786-266-5
Institute of Environmental Sciences and Technology (Annual Technical Meeting) <45, 1999, Ontario/Calif.>
Conference Paper
Fraunhofer WKI ()
electron speckle pattern interferometry (ESPI); Video-Holografie; transient thermography; grey level correlation technique; Historical monuments; halftimbered framework

For monitoring the impact of environmental stress on buildings, test specimen have to undergo an examination in a climatic chamber. Therefore, at the Wilhelm Klauditz - Institute different climatic chambers are used with a test area up to 8.3 m length and 2.5 m height. Under these controlled, reproducible climatic conditions, different nondestructive measurement techniques can monitor the impact of stress to test specimen. Depending of the reaction of the object under investigation, electronic speckle pattern interferometry (ESPI) for 3-D microdeformation measurements, grey level correlation technique for 2-D in-plane deformation measurements and transient thermography for the interrogation of internal defects and structural faults has been used.