3D打印功能梯度夹层泡沫的动态响应

IF 3.4 4区 工程技术 Q1 ENGINEERING, MECHANICAL
Dileep Bonthu, Bharath H.S., S. Bekinal, P. Jeyaraj, M. Doddamani
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引用次数: 0

摘要

目的介绍功能梯度夹层泡沫(FGSF)的三维打印技术。这项工作是通过使用实验和数值分析预测3DP-FGSF的机械屈曲和自由振动行为来继续的。设计/方法/方法最初,开发了中空玻璃微球增强高密度聚乙烯基聚合物复合泡沫,并将这些材料挤出成各自的细丝。这些细丝被用作基于3DP的熔融细丝制造中的原料,用于开发FGSF。对冷冻干燥的样品进行扫描电子显微镜分析,以观察填料的可持续性。此外,还对FGSF的密度、临界屈曲载荷(Pcr)、固有频率(fn)和阻尼因子进行了评估。使用双切线法和修正的Budiansky准则估计了FGSF的临界屈曲载荷(Pcr)。结果FGSF的密度随着填料比例的增加而降低。机械屈曲载荷随填料百分比的增加而增加。对应于FGSF第一模式的固有频率在预屈曲状态下随着载荷的增加和后屈曲区域的增加而呈现出下降趋势,而阻尼因子呈现出相反的趋势。独创性/价值当前的研究工作通过开发功能梯度泡沫基夹层梁在3D打印领域具有价值。此外,它旨在呈现3D打印的FGSF的屈曲行为,对应于前三种模式的频率和阻尼因子随载荷增加的变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dynamic response of 3D printed functionally graded sandwich foams
Purpose The purpose of this study was to introduce three-dimensional printing (3DP) of functionally graded sandwich foams (FGSFs). This work was continued by predicting the mechanical buckling and free vibration behavior of 3DP FGSFs using experimental and numerical analyses. Design/methodology/approach Initially, hollow glass microballoon-reinforced high-density polyethylene-based polymer composite foams were developed, and these materials were extruded into their respective filaments. These filaments are used as feedstock materials in fused filament fabrication based 3DP for the development of FGSFs. Scanning electron microscopy analysis was performed on the freeze-dried samples to observe filler sustainability. Furthermore, the density, critical buckling load (Pcr), natural frequency (fn) and damping factor of FGSFs were evaluated. The critical buckling load (Pcr) of the FGSFs was estimated using the double-tangent method and modified Budiansky criteria. Findings The density of FGSFs decreased with increasing filler percentage. The mechanical buckling load increased with the filler percentage. The natural frequency corresponding to the first mode of the FGSFs exhibited a decreasing trend with an increasing load in the pre-buckling regime and an increase in post-buckled zone, whereas the damping factor exhibited the opposite trend. Originality/value The current research work is valuable for the area of 3D printing by developing the functionally graded foam based sandwich beams. Furthermore, it intended to present the buckling behavior of 3D printed FGSFs, variation of frequency and damping factor corresponding to first three modes with increase in load.
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来源期刊
Rapid Prototyping Journal
Rapid Prototyping Journal 工程技术-材料科学:综合
CiteScore
8.30
自引率
10.30%
发文量
137
审稿时长
4.6 months
期刊介绍: Rapid Prototyping Journal concentrates on development in a manufacturing environment but covers applications in other areas, such as medicine and construction. All papers published in this field are scattered over a wide range of international publications, none of which actually specializes in this particular discipline, this journal is a vital resource for anyone involved in additive manufacturing. It draws together important refereed papers on all aspects of AM from distinguished sources all over the world, to give a truly international perspective on this dynamic and exciting area. -Benchmarking – certification and qualification in AM- Mass customisation in AM- Design for AM- Materials aspects- Reviews of processes/applications- CAD and other software aspects- Enhancement of existing processes- Integration with design process- Management implications- New AM processes- Novel applications of AM parts- AM for tooling- Medical applications- Reverse engineering in relation to AM- Additive & Subtractive hybrid manufacturing- Industrialisation
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