Some studies on functional behavior of novel multi-layered material for integrated structural application

Abstract

Fused deposition modeling (FDM) is a prominent technique in additive manufacturing (AM), widely employed for the construction of intricate prototypes through successive layer-by-layer deposition. Among the thermoplastic matrices used, polylactic acid (PLA) stands out as an environmentally friendly and hydrophobic polymer derived from organic sources. PLA boasts properties like biocompatibility, biodegradability, and high strength, making it a favored choice in diverse industries, including medical, food packaging, and textiles. The incorporation of wood flour into the thermoplastic matrix, referred to as Wood-PLA, has demonstrated increased material strength, leading to its adoption in sectors like automobile and aircraft interiors, fencing, flooring, musical equipment, and various other consumer goods. Additionally, the introduction of multi-material, an innovative material with varying multi-phase properties across different structural regions, has found application in a wide array of industries, including biomedical, energy storage, optoelectronics, aerospace, automobile, and defense. This study aims to investigate the impact of different build orientations (0˚, 45˚, and 90˚) on the mechanical properties of Wood-PLA, pure PLA, and multi-layered material (MLM) fabricated through FDM. Finite element analysis of tensile and compressive test has performed using ABAQUS software and compared with experimental outcomes. Additionally, fracture morphology are examined to gain insights into the modes of failure during fracture. Results reveal significant variations in the mechanical properties of Wood-PLA, PLA and MLM, depending on the build orientation. Furthermore, the examination of fracture morphology provides valuable insights into the failure mechanisms in these materials. Hence this study contributes to the growing body of research on advanced materials and additive manufacturing techniques, paving the way for improved material selection and design considerations.