Investigate the effect of additive manufacturing process parameters for customized design

• Main Author: Ma Nilar Win @ Zhang Li Fang
• Other Authors: Moon Seung Ki
• Format: Final Year Project
• Language: English
• Published: 2018
• Subjects: DRNTU::Engineering::Mechanical engineering::Prototyping
• Online Access: http://hdl.handle.net/10356/74728
• Institution: Nanyang Technological University

Over the years, first mile last mile travel has gained popularity, and riding along with it are personal mobility devices. Bicycle sharing and electric-scooters are most commonly used first mile last mile travel in Singapore. However, as they are bulky and heavy, a customised version of a penny board was explored as a new form of first mile last mile travel. This customisation was implemented through the use of additive manufacturing. Additive manufacturing, or commonly known as 3D printing, allows users to fabricate unique geometries that are originally not possible to produce with traditional manufacturing methods. The project aims to test the effect of layer thickness and build orientation on 3D printed hexagonal lattice structures of different size combinations. ASTM D790 was conducted using an Instron machine. It was found that structures that had small hexagons surrounding the large hexagons were better able to resist bending as compared to structures with only large hexagons. Also, 0 degrees build orientation fared better in resisting bending than the 90 degrees orientation. As for layer thickness, the results were inconclusive as not all samples followed the trend observed. In addition, whether a solid structure or a lattice structure was stronger depends on how the lattice structure was used. The results obtained could then be used for practical applications, and in this case the redesigning of penny board deck.