3Dプリントされた熱可塑性複合材の振動特性の同定と最適化

抄録

Recently, it has become possible to manufacture carbon fiber reinforced plastics (CFRP) using 3D printing technology. This has made it possible to easily fabricate composite materials with complex shapes. The 3D printer for CFRP mainly uses thermoplastic matrix materials and they have mechanical properties different from those of CFRP composed of conventional thermosetting resins. Since CFRP is fabricated by gradual layering from a 3D printer head, 3D printed CFRP has different characteristics from even conventional thermoplastic CFRP fabricated by hot pressing or other methods. Dynamic mechanical properties such as vibration as well as static ones of 3D printed CFRP have not been fully investigated. For these reasons, the identification of material properties is required to calculate the vibration characteristics of 3D printed CFRP with a high accuracy. The objective of this study is to accurately identify the material constants of 3D printed CFRP and to perform numerical analysis of the vibration characteristics with high reproducibility.