通过直接墨水书写环氧基核心表征微夹层结构

IF 3.5 3区 材料科学 Q1 ENGINEERING, MECHANICAL Journal of Sandwich Structures & Materials Pub Date : 2022-08-06 DOI:10.1177/10996362221118329
Zane J Smith, Demiana R Barsoum, Zachariah Arwood, D. Penumadu, R. Advíncula
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引用次数: 3

摘要

夹层结构(SS)复合材料具有相当大的抗弯刚度和高强度重量比,可以定制为功能材料。历史上,由于制造方法的限制,它们被限制在特定的材料类型和几何形状上。然而,采用增材制造(AM),特别是直接墨水书写(DIW),可以提供一种替代方法,用于制造具有复杂和可控微观和细观结构的SS复合材料,具有针对所需机械,热和电性能的多功能。DIW是一种基于挤压的增材制造技术,它使用一种粘性和触变油墨,其中含有所需的成分,一旦打印出来,就会被固化,以获得最终复杂的净形状部件。本文采用一种新型复合增材制造技术,分别采用DIW法和真空灌注法制备双酚基环氧树脂芯和碳纤维增强聚合物(CFRP)面片的SS复合材料。我们证明了这些SS复合材料的制造可以从热固性材料中定制,从中可以制造添加剂和/或各种晶格结构,以实现增强和理想的机械完整性和功能特性。采用表面拓扑和力学测试技术对制备的杂化SS复合材料进行表征,以研究和评估其力学稳定性。为芯材开发了流变动力学固化模型,以满足增材制造工艺要求,同时确保热固性芯材的完全交联。由于能够获得相对较小的芯厚和可控的结构,这种方法现在允许制造层状微夹层结构,以实现相关应用中的进一步轻量化。
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Characterization of micro-sandwich structures via direct ink writing epoxy based cores
Sandwich structured (SS) composites demonstrate considerable flexural stiffness and high strength-to-weight ratios and can be tailored as functional materials. Historically they have been constrained to specific material types and geometry due to limitations in manufacturing methods. However, employing additive manufacturing (AM), specifically direct ink writing (DIW), can provide an alternative method for making SS composites with complex and controllable micro and mesostructures with multifunctionality targeted at desired mechanical, thermal, and electrical properties. DIW, an extrusion-based AM technique, uses a viscous and thixotropic ink with desired components that, once printed, is cured to obtain the final complex net shape parts. In this paper, a novel hybrid AM technique is employed to manufacture SS composite materials containing bisphenol A-based epoxy core and carbon fiber reinforced polymer (CFRP) face sheets that are fabricated via DIW and vacuum infusion process (VIP), respectfully. We demonstrate that the fabrication of these SS composites can be tailored from a thermosetting material, from which additives and/or various lattice structures can be manufactured to achieve enhanced and desirable mechanical integrity with functional properties. Surface topology and mechanical testing techniques are used to characterize the fabricated hybrid SS composites to study and assess mechanical stability. A rheo-kinetic cure model was developed for the core material to allow for additive manufacturing process requirements while ensuring complete cross-linking for the thermoset-based core material. Because of the ability to obtain relatively small core-thickness and controlled architecture, this method now allows for fabricating layered micro-sandwich structures for realizing further light-weighting in relevant applications.
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来源期刊
Journal of Sandwich Structures & Materials
Journal of Sandwich Structures & Materials 工程技术-材料科学:表征与测试
CiteScore
9.60
自引率
2.60%
发文量
49
审稿时长
7 months
期刊介绍: The Journal of Sandwich Structures and Materials is an international peer reviewed journal that provides a means of communication to fellow engineers and scientists by providing an archival record of developments in the science, technology, and professional practices of sandwich construction throughout the world. This journal is a member of the Committee on Publication Ethics (COPE).
期刊最新文献
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