AVS 66th International Symposium & Exhibition
    Manufacturing Science and Technology Group Thursday Sessions
       Session MS-ThP

Paper MS-ThP1
Evaluation of Mechanical Properties of Infill Structures Change during 3D Modeling

Thursday, October 24, 2019, 6:30 pm, Room Union Station B

Session: Manufacturing Science and Technology Poster Session
Presenter: Seita Ogawa, Aichi Institute of Technology, Japan
Authors: S. Ogawa, Aichi Institute of Technology, Japan
A. Matsumuro, Aichi Institute of Technology, Japan
Correspondent: Click to Email
By products with a 3D printer, modeling of complex shapes is possible based on the data obtained by 3D CAD and 3D scanner. In recently, 3D printers are actively used for products from the stage of being used for prototyping. Therefore, we have focused on the filling rates and infill structures for 3D printing products. There are cavities in the shaped object, and the mechanical properties of the object change depending on infill structures and filling rates. Our purpose of this study is to evaluate mechanical characteristics for infill formation conditions due to create an important database in future. we considered it to be important creating a database of their mechanical properties for products used 3D printer.Conventional tensile test and three-point bending test were performed using typical types of materials, ABS resin, PLA resin, and Primalloy（ Mitsubishi Chemical Co., Ltd. ). In this research, the infill structures of several kinds of default set with slicer software used, i.e. hatching, zigzag, honeycomb and 3D honeycomb. The filling rates were increased to 50% every 10%. The test pieces used the dumbbell shape based on JIS.K7161. I used a MUTOH 3D printer MF-2200D as a device, and used an Imada measuring stand and a force gauge for a tensile test and a three-point bending test. In the three-point bending test, we tested from both side of flat surface and edge side to the stacking direction.As a result, the ABS test piece of the filling rate 30% and 50% increased 60% and 70% higher than the filling rate 10% and 50% respectively in the tensile strength. It was found that an increasing of the filling rates leads to an increasing of mechanical properties. Summarizing results of all test conditions, it was cleared that the tendency of the mechanical properties of bending from two directions was different in the all materials. The tendency of mechanical properties was different depending on different kinds of material.From our results, we considered it to these databases will be great important for products of large field using 3D printers. Furthermore, we try to investigate several kinds of infill structures that have higher strength. Finally, we hope that our study contributes to innovative industry in the near future.