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Research Letters in Materials Science
Volume 2008, Article ID 186427, 4 pages
http://dx.doi.org/10.1155/2008/186427
Research Letter

Calibrated Pulse-Thermography Procedure for Inspecting HDPE

1International Center for Automotive Research (CU-ICAR), Clemson University, 340 Campbell Jr. Graduate Engineering Center (CGEC), Greenville, SC 29607, USA
2Department of Mechanical Engineering, Clemson University, Clemson, SC 29634, USA

Received 11 September 2008; Accepted 2 December 2008

Academic Editor: Rui Vilar

Copyright © 2008 Mohammed A. Omar et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This manuscript discusses the application of a pulse-thermography modality to evaluate the integrity of a high-density polyethylene HDPE joint for delamination, in nonintrusive manner. The inspected HDPE structure is a twin-cup shape, molded through extrusion, and the inspection system comprises a high-intensity, short-duration radiation pulse to excite thermal emission; the text calibrates the experiment settings (pulse duration, and detector sampling rate) to accommodate HDPE bulks thermal response. The acquired thermal scans are processed through new contrast computation named “self-referencing”, to investigate the joint tensile strength and further map its adhesion interface in real-time. The proposed system (hardware, software combination) performance is assessed through an ultrasound C-scan validation and further benchmarked using a standard pulse phase thermography (PPT) routine.