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Proceedings Paper

Finite element modeling of pulse phase thermography of an approximate model of low velocity impact induced damage in carbon fiber reinforced polymer structures
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Paper Abstract

In this work, we apply the finite element (FE) method to simulate an approximate low velocity impact induced model. One important characteristic of low velocity impact damage is the presence of multiple defects located at different depths, creating overshadowing among each other, affecting the thermal diffusion and therefore the blind frequency and temperature distribution on the surface, understanding this phenomenon is paramount in order to quantify the magnitude of under-the-surface damages. In this paper, we create a representative geometry of a defect using the meshing code CUBIT and solve the finite element model in ARIA thermal code in order to simulate the phase component of reflected thermal waves. The phase and thermal data collected from the FE solution on the surface above each defect is post processed and linearly correlated, in conjunction with a two-point strategy to provide information about the defect below the surface of interest. We also present a comparison with a single defect representation of the defect, proving that single model defect is not accurate to represent damage created by low velocity impact.

Paper Details

Date Published: 13 May 2019
PDF: 20 pages
Proc. SPIE 10990, Computational Imaging IV, 109900S (13 May 2019); doi: 10.1117/12.2513434
Show Author Affiliations
Saul Hernandez Valle, Naval Surface Warfare Ctr. Dahlgren Div. (United States)
Kara Peters, North Carolina State Univ. (United States)

Published in SPIE Proceedings Vol. 10990:
Computational Imaging IV
Abhijit Mahalanobis; Lei Tian; Jonathan C. Petruccelli, Editor(s)

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