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Title: LATERAL HEAT FLOW INFRARED THERMOGRAPHY FOR THICKNESS INDEPENDENT DETERMINATION OF THERMAL DIFFUSIVITY IN CFRP

Abstract

In conventional infrared thermography, determination of thermal diffusivity requires thickness information. Recently GE has been experimenting with the use of lateral heat flow to determine thermal diffusivity without thickness information. This work builds on previous work at NASA Langley and Wayne State University but we incorporate thermal time of flight (tof) analysis rather than curve fitting to obtain quantitative information. We have developed appropriate theoretical models and a tof based data analysis framework to experimentally determine all components of thermal diffusivity from the time-temperature measurements. Initial validation was carried out using finite difference simulations. Experimental validation was done using anisotropic carbon fiber reinforced polymer (CFRP) composites. We found that in the CFRP samples used, the in-plane component of diffusivity is about eight times larger than the through-thickness component.

Authors:
; ; ; ;  [1]
  1. Nondestructive Technologies Laboratory, GE--Global Research Center, Niskayuna, NY 12309 (United States)
Publication Date:
OSTI Identifier:
21210237
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 975; Journal Issue: 1; Conference: 34. annual review of progress in quantitative nondestructive evaluation, Golden, CO (United States), 22-27 Jul 2007; Other Information: DOI: 10.1063/1.2902696; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANISOTROPY; CARBON FIBERS; COMPOSITE MATERIALS; COMPUTERIZED SIMULATION; DATA ANALYSIS; FINITE DIFFERENCE METHOD; HEAT FLUX; HEAT TRANSFER; INFRARED THERMOGRAPHY; NONDESTRUCTIVE TESTING; POLYMERS; REINFORCED MATERIALS; TEMPERATURE MEASUREMENT; THERMAL DIFFUSION; THERMAL DIFFUSIVITY; THICKNESS; TIME-OF-FLIGHT METHOD; VALIDATION

Citation Formats

Tralshawala, Nilesh, Howard, Don, Knight, Bryon, Plotnikov, Yuri, and Ringermacher, Harry. LATERAL HEAT FLOW INFRARED THERMOGRAPHY FOR THICKNESS INDEPENDENT DETERMINATION OF THERMAL DIFFUSIVITY IN CFRP. United States: N. p., 2008. Web. doi:10.1063/1.2902696.
Tralshawala, Nilesh, Howard, Don, Knight, Bryon, Plotnikov, Yuri, & Ringermacher, Harry. LATERAL HEAT FLOW INFRARED THERMOGRAPHY FOR THICKNESS INDEPENDENT DETERMINATION OF THERMAL DIFFUSIVITY IN CFRP. United States. https://doi.org/10.1063/1.2902696
Tralshawala, Nilesh, Howard, Don, Knight, Bryon, Plotnikov, Yuri, and Ringermacher, Harry. Thu . "LATERAL HEAT FLOW INFRARED THERMOGRAPHY FOR THICKNESS INDEPENDENT DETERMINATION OF THERMAL DIFFUSIVITY IN CFRP". United States. https://doi.org/10.1063/1.2902696.
@article{osti_21210237,
title = {LATERAL HEAT FLOW INFRARED THERMOGRAPHY FOR THICKNESS INDEPENDENT DETERMINATION OF THERMAL DIFFUSIVITY IN CFRP},
author = {Tralshawala, Nilesh and Howard, Don and Knight, Bryon and Plotnikov, Yuri and Ringermacher, Harry},
abstractNote = {In conventional infrared thermography, determination of thermal diffusivity requires thickness information. Recently GE has been experimenting with the use of lateral heat flow to determine thermal diffusivity without thickness information. This work builds on previous work at NASA Langley and Wayne State University but we incorporate thermal time of flight (tof) analysis rather than curve fitting to obtain quantitative information. We have developed appropriate theoretical models and a tof based data analysis framework to experimentally determine all components of thermal diffusivity from the time-temperature measurements. Initial validation was carried out using finite difference simulations. Experimental validation was done using anisotropic carbon fiber reinforced polymer (CFRP) composites. We found that in the CFRP samples used, the in-plane component of diffusivity is about eight times larger than the through-thickness component.},
doi = {10.1063/1.2902696},
url = {https://www.osti.gov/biblio/21210237}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 975,
place = {United States},
year = {2008},
month = {2}
}