环氧树脂/PLA/石墨烯/SiO2复合材料的力学和断裂性能

IF 1.2 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Frattura ed Integrita Strutturale Pub Date : 2023-03-21 DOI:10.3221/igf-esis.64.15

K. Dileep, A. Srinath, N. Banapurmath, M. A. Umarfarooq, A. M. Sajjan

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引用次数: 0

摘要

研究了石墨烯和SiO2的添加对环氧（80%）-聚乳酸（20%）复合材料力学性能和断裂性能的影响。环氧PLA复合材料负载有石墨烯和SiO2（0.1-0.5wt.%，每种填料的重量相等），并通过浴超声处理和手动铸造制造。纳米复合材料的拉伸、弯曲强度和断裂韧性随着填料浓度的增加而增加，直到达到0.3wt.%。填料含量高于0.3重量%的添加大大降低了机械性能和断裂性能。使用扫描电子显微镜成像检查拉伸试验的断裂表面，以了解添加填料的影响。在ANSYS工作台上使用代表性体积单元（RVE）对填料浓度对纳米复合材料拉伸强度的影响进行了数值分析。

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Mechanical and Fracture Characterization of Epoxy/PLA/Graphene/SiO2 Composites

This work investigated the effects of graphene and SiO2 addition on the mechanical and fracture properties of epoxy (80%) - Polylactic acid (PLA) (20 %) composites. Epoxy-PLA composites were loaded with graphene and SiO2 (0.1-0.5 wt. % with equal weightage of each filler), and were manufactured by bath sonication followed by manual casting. The tensile, flexural strength and fracture toughness of nanocomposites increased with an increase in filler concentration till it reached 0.3 wt. %. The addition of filler content higher than 0.3 wt. % drastically reduced the mechanical and fracture properties. The fractured surfaces from the tensile tests were examined using Scanning electron microscopy imaging to understand the effects of filler addition. The numerical analysis was also performed to simulate the impact of filler concentration on the tensile strength of nanocomposites using representative volume element (RVE) in ANSYS workbench.

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