Study on Full-Field Stress Analysis for Composite Material Structure Using Lock-in Thermography

Abstract:

This paper describes a set of theoretical and experimental results based on thermoelastic effect measurement from Glass-Fiber-Reinforced-Polymer (GFRP) composite structure for full-filed stress analysis. The sum of the principle stress (The first stress invariant) can be measured by means of thermoelastic stress analysis (TSA), and this method is used to determine the stress concentration of the composite structure. A finite element analysis is proposed to predict the stress distribution for GFRP gluing structure. The lock-in thermography has been applied to measure the structure stress distribution by its high thermal resolution. The experiment was carried out with different GFRP composite structures by lock in thermography. The experimental results show the stress distribution can be measured and evaluated with good accuracies by using of lock-in thermography

• Periodical: Advanced Materials Research (Volumes 314-316)
• Pages: 1372-1376
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.314-316.1372
• Online since: August 2011
• Authors: Jun Yan Liu, Xun Liu, Yang Wang
• Keywords: Composite Material Structure, Full-Field Stress Analysis, Lock-In Thermography, Thermoelastic Effect

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