海砂加固对功能分级环氧树脂复合材料静态和动态性能的影响

IF 2.4 3区 化学 Q3 POLYMER SCIENCE
T. S. Mohan Kumar, Sharnappa Joladarashi, S. M. Kulkarni, Saleemsab Doddamani
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引用次数: 0

摘要

本研究旨在研究以海砂颗粒为增强体的功能分级环氧树脂复合材料的静态和动态特性。在这项研究中,通过在环氧树脂中分散海砂,制造出了功能分级聚合物复合材料(FGPC),在材料内部呈现出空间变化的成分剖面。通过改变海砂成分[0%、10%、20%和 30%(重量比)],测定了所制备 FGPC 的物理机械性能和高应变率压缩响应。采用烧损试验和重量法进行了级配分析,结果明显吻合,并且可以确定级配的变化。密度和空隙率随着海砂成分的增加而增加。与填充 30% 海砂的环氧树脂相比,纯环氧树脂的拉伸强度和比强度提高了 2.41 倍。从 FGPC 的复合侧加载时,与纯环氧相比,30% 海砂填充环氧的抗弯强度提高了 27.93%,硬度提高了 12.47%,冲击强度提高了 2.35 倍。在动态压缩加载条件下,对纯净环氧和填充环氧的 FGPC 进行了劈裂-霍普金森压杆实验。这些样品在 2、3 和 4 巴的压力下以 103 s-1 的应变速率变形。利用原始数据计算了应力-应变曲线和应变率。高应变率提高了抗压强度,随着应变率的增加,抗压强度呈指数增长。断裂试样的扫描电子显微镜显微照片用于分析断裂特征。 图表摘要
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Influence of sea sand reinforcement on the static and dynamic properties of functionally graded epoxy composites

Influence of sea sand reinforcement on the static and dynamic properties of functionally graded epoxy composites

Influence of sea sand reinforcement on the static and dynamic properties of functionally graded epoxy composites

This study aims to study the static and dynamic properties of the functionally graded epoxy composites with sea sand particles as reinforcement. In this study, functionally graded polymer composites (FGPC) were fabricated by dispersing sea sand throughout the epoxy, exhibiting a spatially varying composition profile within the material. Physio-mechanical properties and high strain rate compression responses were determined for the prepared FGPC by varying the composition of sea sand [0%, 10%, 20%, and 30% (by weight)]. The gradience analysis was performed using the burn-out test and weight method, and the results significantly matched, as well as the variation in gradation could be identified. The density and void content are increased with increased sea sand composition. Tensile and specific strength for neat epoxy shows a 2.41 times increase compared to 30% sea sand-filled epoxy. When loaded from the composite side of FGPC, flexural strength increased by 27.93%, hardness increased by 12.47%, and impact strength increased by 2.35 times for 30% sea sand-filled epoxy compared to neat epoxy. Under dynamic compression loading, FGPC was subjected to split-Hopkinson pressure bar experiments for neat and filled epoxy. These samples were deformed at strain rates in the 103 s−1 while subjected to pressures of 2, 3, and 4 bar. Stress–strain curves and the strain rate were computed using the raw data. High strain rates improve compressive strength, which increases exponentially as the strain rates increase. Scanning electron microscopy micrographs of the fractured specimen are employed to analyze the fracture characteristics.

Graphical Abstract

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来源期刊
Iranian Polymer Journal
Iranian Polymer Journal 化学-高分子科学
CiteScore
4.90
自引率
9.70%
发文量
107
审稿时长
2.8 months
期刊介绍: Iranian Polymer Journal, a monthly peer-reviewed international journal, provides a continuous forum for the dissemination of the original research and latest advances made in science and technology of polymers, covering diverse areas of polymer synthesis, characterization, polymer physics, rubber, plastics and composites, processing and engineering, biopolymers, drug delivery systems and natural polymers to meet specific applications. Also contributions from nano-related fields are regarded especially important for its versatility in modern scientific development.
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