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http://dx.doi.org/10.7234/composres.2019.32.6.395

A Study on Manufacturing Method of Standard Void Specimens for Non-destructive Testing in RFI Process and Effect of Void on Mechanical Properties  

Han, Seong-Hyeon (Composite Research Division, Korea Institute of Materials Science)
Lee, Jung-Wan (Composite Research Division, Korea Institute of Materials Science)
Kim, Jung-Soo (Composite Research Division, Korea Institute of Materials Science)
Kim, Young-Min (Composite Research Division, Korea Institute of Materials Science)
Kim, Wee-Dae (Department of Aerospace Engineering, Punsan National University)
Um, Moon-Kwang (Composite Research Division, Korea Institute of Materials Science)
Publication Information
Composites Research / v.32, no.6, 2019 , pp. 395-402 More about this Journal
Abstract
The RFI process is an OoA process that fiber mats and resin films are laminated and cured in a vacuum bag. In case that resin film is insufficient to fill empty space in fibers, it makes void defect in composites and this void decrease mechanical properties of the composites. For this reason, non-destructive testing is usually used to evaluate void of manufactured composites. So, in this study, a manufacturing method of standard void specimens, which are able to be used as references in non-destructive testing, was proposed by controlling resin film thickness in the RFI process. Also, a fiber compaction test was proposed as a method to set the resin film thicknesses depending on target voids of manufacturing panels. The target void panels of 0%, 2%, and 4% were made by the proposed methods, and signal attenuation depending on void was measured by non-destructive testing and image analysis. In addition, voids of specimens for tensile, in-plane, short beam and compressive tests were estimated by signal attenuation, and mechanical properties were evaluated depending on the voids.
Keywords
RFI (Resin Film Infusion); OoA (Out of Autoclave); NDT (Non-destructive Testing); Void content;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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