Journal
JOURNAL OF COMPOSITE MATERIALS
Volume 46, Issue 12, Pages 1417-1430Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/0021998311418703
Keywords
sandwich structure; VARTM; groove; race-tracking; equivalent thickness; porosity; permeability; infusion simulation
Categories
Funding
- National Science Council of the Republic of China, Taiwan [NSC 97-ET-7-002-014-ET]
- United Ship Design & Development Center [USDDC-740-T252]
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A sandwich assembly with core material enhances the bending stiffness of a structure and achieves lightweight requirements. Resin flowing behavior inside a sandwich assembly consisting of fiber layers and a segmented core is more complex than that for a fibrous assembly consisting of only fiber layers. This study presents infusion experiments on sandwich assemblies in the VARTM process, and compares the results to simulations from a 3D sandwich model including circular pipe elements to substitute for core grooves. Using the concepts of equivalent thickness to define the porosity of a sandwich assembly and porous space helps derive permeability trends and predictive equations to simplify permeability calculation. The deck infusing experiment in this study not only proves the permeability rationality of a sandwich assembly, but also provides concepts and suggestions for infusion arrangements. Consequently, the permeant characteristics in the sandwich assembly are applicable to manufacturing sandwich structures with good saturation.
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