EXPERIMENTAL STUDY OF RELATIVE YOUNG'S MODULUS GIBSON-ASHBY CONSTANT FOR GYROID LATTICE STRUCTURE NUMERICAL PREDICTION

• Main Author: Rafli Ramadhan, Muhammad
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/78357
• Institution: Institut Teknologi Bandung

Several applications of materials, especially in the biomedical field, demand materials with specific mechanical properties. Achieving this goal can be done, in part, by engineering lattice structures hence the development of lattice structures becomes a burgeoning research topic. One of the most commonly used lattice structures is the Gyroid Lattice Structure (GLS). However, research on GLS has predominantly focused on its mechanical properties potential compared to other lattice structure types. According to Yafeng's optimization method, optimizing lattice structures necessitates a precise correlation between relative density variations and the mechanical properties of the structure. In 2020, Judawisastra conducted a numerical study on the correlation between volume fraction and the mechanical properties of GLS, particularly the relative Young's Modulus, using finite element analysis at various relative densities from low to high. Therefore, this study attempts experimental study on GLS with various volume fraction configurations with determined the minimum unit cell count from Judawisastra's numerically predicted convergent mechanical properties. As a result of this study, the relative Young's Modulus results obtained from this testing are relatively consistent with those from other references and numerical predictions using FEM. However, the relative Young's Modulus obtained has small deviations from numerical predictions in all configurations, but 50% and 70% volume fractions specimens with the [110] orientation occur early failure phenomena due to manufacturing processes at the beginning.