Mixed-mode fracture behavior of 3D-printed PLA with zigzag filling
| Autor: | YıldızEge Can, KayaŞeyma Helin, ChoupaniNaghdali, TorunAhmet Refah |
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| Rok vydání: | 2021 |
| Předmět: |
3d printed
Materials science Polymers and Plastics 010405 organic chemistry Biomaterial 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Pollution 0104 chemical sciences Polyester chemistry.chemical_compound Zigzag Polylactic acid chemistry Materials Chemistry engineering Mixed mode fracture Biopolymer Composite material 0210 nano-technology |
| Zdroj: | Green Materials. 9:29-36 |
| ISSN: | 2049-1239 2049-1220 |
| DOI: | 10.1680/jgrma.20.00013 |
| Popis: | Polylactic acid (PLA) is a widely used biomaterial in medical applications as a biodegradable and renewable aliphatic polyester type of material. This material is often subjected to different defects and damages from in-service and manufacturing conditions, and the increasing demand for PLA for different applications requires a thorough understanding of its fracture behavior. In this work, a numerical and experimental study of the mixed-mode fracture behaviors of three-dimensional (3D)-printed PLA samples with a zigzag pattern of different filling ratios was performed using a recently developed special loading fixture. The 3D-printed samples were produced with a 200°C nozzle at 60°C bed temperature and 50 mm/s printing speed. Mixed-mode fracture tests from pure tensile to pure shear loading were performed by varying the loading angle, α, from 0 to 90°. Finite-element analyses were conducted by using the Abaqus software program, and geometrical factors were obtained at different loading angles. As a result, the fracture toughness values of pure tensile loading, pure shear loading and mixed modes were determined. |
| Databáze: | OpenAIRE |
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