Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2019 - September 11, 2019
In this study, ultrasonic testing equipment is developed to evaluate 3D-printer filaments, particularly short-fiber reinforced reproduction filaments. Recently, 3D printers based on fused deposition modeling (FDM) using thermoplastics have become popular because of the simplicity and relatively low cost. In addition, filaments containing carbon or glass fibers have also been developed to improve the mechanical properties of products. In 3D printers using reproduced filaments, the quality of the filament affects the reliability of the products, particularly in the case of fiber-reinforced filaments. In this equipment, ultrasonic waves that passed through the target filament along the longitudinal direction were measured, and the physical properties of the filament were predicted based on wave propagation velocity. To confirm the validity of the ultrasonic inspection, a finite difference time domain simulation was conducted. It was determined that change in velocity in ultrasonic waves can be used as an index of filament degradation.
