Mathematical and numerical simulation of geometry and mechanical behavior of sandwich composites reinforced with 1 × 1-Rib-Gaiting weft-knitted spacer fabric; compressional behavior

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Composite Structures Pub Date : 2021-07-15 DOI:10.1016/j.compstruct.2021.113952

Koorosh Delavari, Hadi Dabiryan

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引用次数: 7

Abstract

The first and most important step in the numerical analysis of the mechanical properties of complex structures is to create an accurate geometrical model. This paper aims to generate a mathematical model for the geometry of weft-knitted spacer fabrics in order to use in the numerical analysis of the mechanical properties of sandwich composites. For this purpose, the equations of path yarn were derived. A mathematical model was developed for the geometry of 1 × 1-Rib-Gaiting weft-knitted spacer fabric using derived equations. In order to simulate the matrix of the sandwich composite, a novel approach was proposed to apply the matrix to the structure of the generated model. The compressional behavior of sandwich composites reinforced with weft-knitted spacer fabrics was simulated using a generated model in the ABAQUS software. The maximum error of 4.04% and 4.2% were recorded in the prediction of geometry and compression modulus of sandwich composites, respectively. In addition, the results of the numerical and experimental compression test showed that the pile yarns have the main role in the compressional behavior of sandwich structures reinforced with spacer fabrics. The maximum Mises and shear stresses are occurred at the midpoint of pile yarns and connection points between piles and layers, respectively.

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1 × 1肋gaiting纬编间隔织物增强夹层复合材料几何与力学性能的数学与数值模拟压缩行为

复杂结构力学性能数值分析的第一步也是最重要的一步是建立精确的几何模型。本文旨在建立纬编间隔织物几何结构的数学模型，用于夹芯复合材料力学性能的数值分析。为此，推导了路径纱的运动方程。利用推导方程，建立了1 × 1肋盖廷纬编间隔织物的几何模型。为了模拟夹层复合材料的矩阵，提出了一种将矩阵应用于生成模型结构的新方法。利用ABAQUS软件生成的模型，对纬编间隔织物增强夹层复合材料的压缩性能进行了数值模拟。预测夹层复合材料几何形状和压缩模量的最大误差分别为4.04%和4.2%。此外，数值和实验压缩测试结果表明，桩纱对间隔织物加固夹层结构的压缩性能起主要作用。最大的米塞斯应力和剪应力分别出现在桩纱中点和桩与层之间的连接点。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IF 3.9 3区医学EyePub Date : 1993-01-01 DOI: 10.1038/eye.1993.36

L Esakowitz, A Kriss, F Shawkat

The repeatability and variability of the multifocal electroretinogram for four different electrodes.

IF 2.9 3区医学Ophthalmic and Physiological OpticsPub Date : 1997-11-01 DOI:

N Mohidin, M K Yap, R J Jacobs

The repeatability and variability of the multifocal electroretinogram for four different electrodes

IF 2.9 3区医学Ophthalmic and Physiological OpticsPub Date : 1997-11-01 DOI: 10.1016/S0275-5408(97)00034-3

N. Mohidin, M.K.H. Yap , R.J. Jacobs

来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.