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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Three-dimensional porosity characterization in carbon/glass fiber epoxy hybrid composites

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Author(s):
Maciel Monticeli, Francisco [1] ; Ornaghi Jr, Heitor Luiz ; Cornelis Voorwald, Herman Jacobus [2] ; Hilario Cioffi, Maria Odila [2]
Total Authors: 4
Affiliation:
[1] Sao Paulo State Univ, UNESP, Fatigue & Aeronaut Mat Res Grp, Dept Mat & Technol, Sch Engn, BR-12516410 Sao Paulo - Brazil
[2] Ornaghi Jr, Jr., Heitor Luiz, Sao Paulo State Univ, UNESP, Fatigue & Aeronaut Mat Res Grp, Dept Mat & Technol, Sch Engn, BR-12516410 Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING; v. 125, OCT 2019.
Web of Science Citations: 1
Abstract

The main objective of this study is to analyze the effect of the stacking sequence of glass/carbon-reinforced hybrid composites on the impregnation quality and on the formation of voids. This was achieved by creating a three-dimensional (3D) microstructure of the laminates from planar microscopy images. It was demonstrated that the impregnation quality could be improved, and the porosity could be minimized by the appropriate selection of the stacking sequence. The present methodology enables the analysis of the effect of various configurations of hybrid reinforcement on the impregnation behavior, and consequently, the formation of voids. The 3D images enable detailed characterization of porosity through the laminate thickness, including void fraction, the location and morphology of voids. Hybrid composites with glass fibers positioned in the middle proved to have more favorable impregnation, and thus, the uniformity of process-induced voids throughout the composite laminates could be reduced and controlled. (AU)

FAPESP's process: 06/02121-6 - Composite processing by RTM
Grantee:Maria Odila Hilário Cioffi
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 15/19967-4 - Void volume fraction of hybrid composites processed by RTM: optimization of voids determination via mercury porosimetry
Grantee:Francisco Maciel Monticeli
Support Opportunities: Scholarships in Brazil - Master