Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 64, Issue -, Pages 234-244Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2014.05.010
Keywords
Prepreg; Lay-up; Consolidation; Resin flow
Funding
- Department of Energy [DE-EE0001367]
- Office of Naval Research (ONR) [N00014-09-1-1011, N00014-10-1-0971]
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Automated manufacturing of composite materials is key to reducing cost and improving consistency in part quality. Modeling of manufacturing processes can identify influential material, geometric, and process variables, while providing a framework for their optimization and control. A process model has been formulated to describe the compaction and saturation of partially impregnated thermoset prepreg tapes during their placement, using a roller compaction and vacuum consolidation. The roles of various parameters that characterize the initial prepreg tape state and the final prepreg tape state are investigated. The model yields the degree of resin saturation in the tape with changes in its thickness after being compacted, due to an external pressure. The results estimate the degree of dry fiber region within the tape, which can provide vacuum pathways for air or volatile removal before consolidation and cure. The model can be adapted for different material constitutive relationships of tape compaction and saturation. (C) 2014 Elsevier Ltd. All rights reserved.
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