Modeling an Characterization of Thermosets Re-Inforced with Carbon Fiber Fleece
Concerning to the need of both robust and lightweight materials there is a strong market growth for carbon fiber (CF). Therefore a huge amount of valuable process waste is produced for example by offcuts. Through new recycling methods the carbon fiber is regained from pol-ymer matrix. The obtained fibers can only be used reasonably in chopped form, which can be re-used for manufacturing an isotropic fleece by wet-laid process. Produced fleeces are im-pregnated with thermosets by resin transfer molding (RTM). For the thermosets with virgin fibers several fiber length (separated and mixed), different ho-mogeneity of the fleece, as well as various amounts of dispersing agent were tested. In addi-tion to that the interrelation between fiber volume content and specific values (tensile strength, flexural stiffness, YOUNG'S modulus) is shown by this research. To design applica-tions with this new material, the mechanical properties have to be forecasted. Hence the iso-tropic fleece is simulated with AUTODESK HELIUS COMPOSITE 2016 by using the classical lam-ination theory (CLT). The results lead to new knowledge of fiber volume content distribution within the sample. Referring to the findings the process is transferred to pilot plant scale and recycling fibers.
Author: Jasmin Mankiewicz, Michael Heber, Ernst Cleve, and Jochen S. Gutmann
Conference: SAMPE Seattle 2017