Jan Philipp Janzen , Hendrik Schäfer , Murat Çelik , Colin Robert , Conchúr M. Ó Brádaigh , David May , Thomas Neumeyer
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引用次数: 0
Abstract
This study presents a novel strategy to overcome the limitations of solid resin prepregs (SRPs) − namely the inability to drape at room temperature and hindered gas evacuation during vacuum-bag-only (VBO) processing − by 3D-printing a regular, uncured solid epoxy resin (SR) pattern on a dry woven textile. The locally patterned resin distribution preserves dry textile regions, enabling room temperature drapeability and more robust VBO-processing due to improved gas evacuation. By adjusting pattern parameters such as element geometry and coverage, the draping behaviour can be controlled to adapt to a desired draping condition. In order to be able to design the right pattern for given draping conditions, the influence of these parameters on bending and shearing was studied. Manual draping showed that bending radii down to 4 mm were achievable, governed only by the element length in bending direction, while coverage had no significant effect. In contrast, picture-frame-tests showed that the shearing is mainly influenced by the coverage and that a maximal shearing angle of 30° can be achieved. These results show that the SRPs bending and shearing can be independently influenced through pattern design. The derived structure–drapeability relationships enable targeted design of SRPs for robust, autoclave-free composite manufacturing.
期刊介绍:
Materials and Design is a multi-disciplinary journal that publishes original research reports, review articles, and express communications. The journal focuses on studying the structure and properties of inorganic and organic materials, advancements in synthesis, processing, characterization, and testing, the design of materials and engineering systems, and their applications in technology. It aims to bring together various aspects of materials science, engineering, physics, and chemistry.
The journal explores themes ranging from materials to design and aims to reveal the connections between natural and artificial materials, as well as experiment and modeling. Manuscripts submitted to Materials and Design should contain elements of discovery and surprise, as they often contribute new insights into the architecture and function of matter.