IR Thermographic Analysis of 3D Printed CFRP Reference Samples with Back-Drilled and Embedded Defects

Saeed, Numan; Omar, Mohammed A.; Abdulrahman, Yusra; Salem, Sultan; Mayyas, Ahmad

doi:10.1007/s10921-018-0512-2

IR Thermographic Analysis of 3D Printed CFRP Reference Samples with Back-Drilled and Embedded Defects

Journal Article · Tue Jul 17 00:00:00 EDT 2018 · Journal of Nondestructive Evaluation

DOI:https://doi.org/10.1007/s10921-018-0512-2· OSTI ID:1467173

Saeed, Numan; ; Abdulrahman, Yusra; Salem, Sultan; Mayyas, Ahmad

Carbon-fiber composite structures may demonstrate a defective behavior due to manufacturing induced anomalies (delamination, dis-bonds) or service related defectives (impact damage, water ingress). Thus, there is a need for a relatively fast and low cost non-intrusive testing schemes such as infrared thermography (IRT). Still, thermography testing requires calibrated samples and coupons to yield best results. The presented research demonstrates the novel use of 3D printing technology to generate IRT calibration samples. In this text, two carbon fiber reinforced polymer samples are 3D printed; the first mimics a 'back-drilled holes' type coupons, while the other is designed to embed air pockets similar to Teflon inserts. The generated samples are then tested using two IRT modalities; namely pulse thermography and lock-in thermography. Furthermore, the resulted thermograms are processed using a principle component analysis, to help highlight the variance of defectives in a consistent manner among the samples. This research findings offer insights on the variation of detectability between embedded and back-printed samples, which might be due to the inserts thickness.

Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

DOE Contract Number:: AC36-08GO28308

OSTI ID:: 1467173

Report Number(s):: NREL/JA-6A20-72255

Journal Information:: Journal of Nondestructive Evaluation, Journal Name: Journal of Nondestructive Evaluation Journal Issue: 3 Vol. 37; ISSN 0195-9298

Country of Publication:: United States

Language:: English

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Related Subjects

36 MATERIALS SCIENCE
3D printing
CFRP
back drilled holes
calibration
composites
thermography

IR Thermographic Analysis of 3D Printed CFRP Reference Samples with Back-Drilled and Embedded Defects

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