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|Title:||On the Calibration of Optical Full-Field Strain Measurement Systems|
|Authors:||WHELAN MAURICE; HACK Erwin; SIEBERT Thorsten; BURGUETE Richard; PATTERSON Eann; SALEEM Qasim|
|Citation:||Applied Mechanics and Materials - Advances in Experimental Mechanics IV vol. 3-4 p. 397-402|
|Publisher:||Trans Tech Publications Inc.|
|JRC Publication N°:||JRC32529|
|Type:||Articles in Journals|
|Abstract:||There are no standard reference materials suitable for the calibration of full-field optical strain measurement systems. This is hindering the uptake of the technology by industrial end-users since optical metrology instrumentation and procedures cannot be easily integrated into quality assurance systems. The EU-funded SPOTS project is developing a physical reference material (PRM) and measurement protocol that should provide the basis of a calibration standard for establishing the traceability of strain values obtained with optical devices. This paper describes a PRM based on a parametric design of monolithic four-point bend test that can reliably generate a known strain field over a range of specimen sizes. Measurements acquired from strain gauges and LVDTs compared well with data obtained from ESPI, digital image correlation, photoelasticity and thermoelasticity studies, demonstrating excellent repeatability and inter-laboratory reproducibility.|
|JRC Institute:||Institute for Health and Consumer Protection|
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