Material Stress Inspection By Digital Thermographic Image Processing

R . A . Fiorini; P. Coppa; O. Salvatore

doi:10.1117/12.966510

19 December 1985 Material Stress Inspection By Digital Thermographic Image Processing

R . A . Fiorini, P. Coppa, O. Salvatore

Proceedings Volume 0575, Applications of Digital Image Processing VIII; (1985) https://doi.org/10.1117/12.966510
Event: 29th Annual Technical Symposium, 1985, San Diego, United States

Abstract

Within the elastic range, a body subjected to tensile or compressive stresses experiences a reversible conversion between mechanical and thermal form of energy. If adiabatic conditions are maintained, the relationship between reversible temperature change and the corresponding change in the sum of the principal stresses is linear and independent of loading frequency. The inspection of the thermoelastic effect on spot weldings using infrared-based systems can give significant data for non destructively evaluation of welding defects. A specimen was first modeled by Finite Element Technique and then tested on an MTS unit monitored by an infrared camera. A digital image processing computer facility was used to compare sequences of images to investigate the dynamic behaviour of the temperature differences. Theo-retical and experimental results are compared.

Citation Download Citation

R . A . Fiorini, P. Coppa, and O. Salvatore "Material Stress Inspection By Digital Thermographic Image Processing", Proc. SPIE 0575, Applications of Digital Image Processing VIII, (19 December 1985); https://doi.org/10.1117/12.966510

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available