| Summary: | 博士 === 國立臺灣科技大學 === 機械工程系 === 105 === Three-dimensional (3D) printing has attracted enormous interest for potential applications of building diverse products. This work studies the hardness and strength of acrylonitrile butadiene styrene (ABS), a widely used 3D printing filament, blended with TiO2 nanoparticles. The creep testing and dynamic mechanical analysis accompanied with the viscoelastic analysis and finite element analysis of the filaments and printed products at room temperature, 50, 75, and 100 C are also investigated. The results show that the mechanical strength, hardness, and storage modulus of ABS filaments increase by adding TiO2 nanoparticles. The results of dynamic mechanical analysis also show that the ABS filaments blended with TiO2 nanoparticles behave better performance at high temperature. A standard solid three-parameter model is employed to simulate the viscoelastic properties of the filaments. The simulation results agree well with the experimental data. Furthermore, finite element method is used to simulate the creep behavior of the printed specimens. The consistent tendency are achieved between the experimental results and numerical simulation. This work indicated that adding TiO2 nanoparticles effectively improves the thermo-mechanical properties of ABS filaments without reducing the 3D printing productivity.
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