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Proceedings Paper

A nondestructive study on porosity content and fiber orientation in CFRP composite laminates using ultrasonic technique method
Author(s): Je-Woong Park; Kwang-Hee Im; David K. Hsu; Vinay Dayal; Dan Barnard; In-Young Yang
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Paper Abstract

It is found that a pitch-catch signal was more sensitive than normal incidence backwall echo of longitudinal wave to subtle flaw conditions in the composites. The depth of the sampling volume where the pitch-catch signal came from was relatively shallow with the head-to-head miniature Rayleigh probes, but the depth can be increased by increasing the separation distance of the transmitting and receiving probes. Also, a method was utilized to determine the porosity content of composites by processing micrograph images of the laminate. The image processing method developed utilizes a free software package to process micrograph images of the test sample. The results from the image processing method are compared with existing data. Beam profile was characterized in unidirectional CFRP(Carbon fiber reinforced plastics) with using pitch-catch Rayleigh probes and the one-sided and two-sided pitch-catch techniques were utilized to produce C-scan images with the aid of the automatic scanner.

Paper Details

Date Published: 20 October 2009
PDF: 8 pages
Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 749372 (20 October 2009);
Show Author Affiliations
Je-Woong Park, Chosun Univ. (Korea, Republic of)
Kwang-Hee Im, Woosuk Univ. (Korea, Republic of)
David K. Hsu, Iowa State Univ. (United States)
Vinay Dayal, Iowa State Univ. (United States)
Dan Barnard, Iowa State Univ. (United States)
In-Young Yang, Chosun Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 7493:
Second International Conference on Smart Materials and Nanotechnology in Engineering
Jinsong Leng; Anand K. Asundi; Wolfgang Ecke, Editor(s)

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