Simulation of SMPs for the Bonding Process of a Gyroid-Core with a CFRP Aerodynamic Profile
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Additive manufacturing (AM) allows to manufacture complex structures such as a lattice or a structure derived from triply periodic minimal surface (TPMS), such as the Gyroid. The TPMS can be used as a core to increase the specific stiffness and strength of a sandwich structure, which are relevant in aerospace engineering. A major challenge is the manufacturing process, where the TPMS core must be inserted and bonded to an aerodynamic profile made of carbon fiber-reinforced polymers (CFRP). This integration can be achieved by using the shape memory effect of a polymeric AM material. The idea is to program the TPMS core to a compact shape, insert it into the airfoil, and expand it during the bonding process to apply pressure on the bonding area. In our contribution, we present a thermo-mechanical, viscoelastic simulation in Abaqus of a shape memory polymer (SMP). In our presentation, we describe the straightforward process from the material characterization by dynamic mechanical analysis to the simulation of the shape memory effect. Lastly, we show the applicability of our approach in the bonding process of a gyroid core to a CFRP aerodynamic profile.
