Exploring Elasto-Plastic Fracture Behaviour of 3D Printed PC/ ABS Blend

Abstract

Thanks to its ability to facilitate easy fabrication of complex-shaped parts using low-cost supplies and compact equipment, 3D printing has rapidly advanced and seamlessly integrated into the daily lives of even ordinary individuals. In recent years, although a wide variety of filament materials have been introduced for ordinary applications in the method, PLA and ABS still stand out as the most commonly used materials. Despite its many superior features, PLA's brittleness and relatively low mechanical and thermal resistance make ABS a preferred choice for longer-lasting end products. The adoption of ABS is crucial, as it offers improved durability and addresses the limitations of PLA, contributing to the overall enhancement of product lifespan. Thus, the utilization and development of materials based on ABS are of paramount importance in the realm of 3D (three-dimensional) printing. In this study, uniaxial tensile and three-point bending tests were conducted to assess mechanical performance of PC/ABS (Polycarbonate/Acrylonitrile Butadiene Styrene) blend used as a filament material in the 3D printing process. Additionally, Double Edge Notched Tensile (DENT) specimens were produced via 3D printing in accordance with the EWF (Essential Work of Fracture) method. The results of the EWF analysis were scrutinized, considering the inherent nature of the method. According to calculations made for suitable ligament (L) lengths, the material's fracture toughness was determined to be 24 kJ/m².