Mechanical damage assessment by means of thermo-electrical lock-in thermography

E. Z. Kordatos; D. A. Exarchos; T. E. Matikas

doi:10.1117/12.2219617

15 April 2016 Mechanical damage assessment by means of thermo-electrical lock-in thermography

E. Z. Kordatos, D. A. Exarchos, T. E. Matikas

Proceedings Volume 9804, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2016; 98041L (2016) https://doi.org/10.1117/12.2219617
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2016, Las Vegas, Nevada, United States

Abstract

The present work deals with the nondestructive assessment of the metallic materials’ mechanical damage. An innovative Nondestructive Evaluation (NDE) methodology based on two thermographic approaches was developed in order the state of fatigue damage to be assessed. The first approach allows the detection of heat waves generated by the thermomechanical coupling during the fatigue loading (online method). Specifically, both the thermo-elastic and intrinsic dissipated energy was correlated with the mechanical degradation and the remaining fatigue life. The second approach involves the monitoring of the materials’ thermal behavior using a Peltier device for accurate thermal excitation (offline method). The correlation of the thermal behavior and the state of damage was achieved by the determination of the material’s thermal response. The combination of these two approaches enables the rapid and accurate assessment of the cumulative damage.

Citation Download Citation

E. Z. Kordatos, D. A. Exarchos, and T. E. Matikas "Mechanical damage assessment by means of thermo-electrical lock-in thermography", Proc. SPIE 9804, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2016, 98041L (15 April 2016); https://doi.org/10.1117/12.2219617

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