Titolo:  A low-cost residual stress measuring instrument
Autori: 
Data di pubblicazione:  2017
Autori:  Baldi, Antonio; Bertolino, Filippo
Presenza coautori internazionali:  no
Lingua:  Inglese
Titolo del libro:  Residual Stress, Thermomechanics & Infrared Imaging, Hybrid Techniques and Inverse Problems, Volume 9. Proceedings of the 2016 Annual Conference on Experimental and Applied Mechanics
ISBN:  978-3-319-42255-8
Editore:  Springer
Tutti i curatori:  Simon Quinn, Xavier Balandraud
Serie:  CONFERENCE PROCEEDINGS OF THE SOCIETY FOR EXPERIMENTAL MECHANICS SERIES
Sezione:  Contributo
Volume:  9
Pagina iniziale:  113
Pagina finale:  119
Numero di pagine:  7
Digital Object Identifier (DOI):  http://dx.doi.org/10.1007/978-3-319-42255-8_15
Codice identificativo Scopus:  2-s2.0-84989868324
Codice identificativo ISI:  WOS:000392264100015
URL:  http://www.springer.com/series/8922
Revisione (peer review):  Comitato scientifico
Nome del convegno:  Annual Conference and Exposition on Experimental and Applied Mechanics, 2016
Periodo del convegno:  6-9 giugno 2016
Luogo del convegno:  Orlando, USA
Abstract:  The hole-drilling method is the approach most used for residual stress measurement and most of the commercially available instruments are based on this working principle. The idea is quite simple: drill a small hole on the surface of the components and measure the strain/displacement components resulting on the surface. The stress components can be estimated from these data with a reverse calibration process. The measurement of the displacement/strain field is usually performed using either strain gauges or interferometric optical methods, thus the cost of the instruments is significant. Recently, it has been proposed to replace the interferometric method with an integrated Digital Image Correlation (i-DIC) approach: by using problem-specific displacement functions, all difficulties related to the low sensitivity of DIC are avoided and the measurement procedure simply requires acquisition of an image after each drilling step. This paper describes the development of a low-cost instrument based on this working principle: the imaging subsystem is based on a Raspberry-Pi camera module whereas step motors are controlled by an Arduino board. Finally, the frame is built using a 3d-printer.
Tipologia: 4.1 Contributo in Atti di convegno

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