Mechanical signature and full-field measurement of flow-induced large in-plane deformation of fibrous reinforcements in composite processing

• Published in: Composites. Part A, Applied science and manufacturing Vol. 118; pp. 213 - 222
• Main Authors: Hautefeuille, A., Comas-Cardona, Sebastien, Binetruy, C.
• Format: Journal Article
• Language: English
• Published: Elsevier 01.03.2019
• Subjects: Engineering Sciences; D. Process monitoring; C. Transport Phenomena analysis; B. Optical techniques; D. Rheology
• ISSN: 1359-835X
• DOI: 10.1016/j.compositesa.2018.12.030

During compression of saturated fibrous reinforcement, the flow of the liquid can, under certain conditions, generate fiber-tows washout (in-plane movement of fiber-tows) due to the strong hydrodynamically induced force on the fibrous reinforcement. The objective of the study is first to detect experimentally the onset and measure the full-field magnitude of the flow-induced in-plane deformation occurring during the compression. Secondly, a methodology is presented, aiming at defining the mechanical signature of fiber-tow washout on transverse compression tests. For this purpose, a large-scale semi-transparent test bench has been developed in order to dynamically track the in-plane motion of the fiber-tows occurring in saturated compression. Then, a nomogram is given to identify a process window of a saturated fibrous reinforcement processed by consolidation.