缝合平纹编织复合材料层合板的面内弹性属性

doi:10.1007/s12204-021-2375-4

J Shanghai Jiaotong Univ Sci ›› 2023, Vol. 28 ›› Issue (2): 220-232.doi: 10.1007/s12204-021-2375-4

缝合平纹编织复合材料层合板的面内弹性属性

袁丽华，梁森，闫盛宇

（青岛理工大学机械与汽车工程学院，山东青岛266520）

收稿日期:2020-10-24 接受日期:2020-12-10 出版日期:2023-03-28 发布日期:2023-03-21

In-Plane Elastic Properties of Stitched Plain Weave Composite Laminate

YUAN Lihua (袁丽华), LIANG Sen∗ (梁森), YAN Shengyu (闫盛宇)

(School of Mechanical & Automotive Engineering, Qingdao University of Technology, Qingdao 266520, Shandong, China)

Received:2020-10-24 Accepted:2020-12-10 Online:2023-03-28 Published:2023-03-21

摘要/Abstract

摘要： 提出了使用代表体积单元法和一种基于细观力学的折线模型来描述因插入缝线而导致的面内纤维偏转。考虑了铺层角度、缝合参数及材料参数，建立了缝合复合材料层合板面内等效弹性参数的多尺度数学模型。基于试件制备和试验验证，开发的理论模型揭示了缝合对结构各向异性的叠加效应。结果表明，缝合方向可以提高结构的各向异性。减小缝合针距与行距以及增大缝线直径，可以减小层合板的弹性模量和剪切模量。随着铺层角度的增大，弹性模量、剪切模量和泊松比均呈现出周期为90°的正弦变化。建立的理论模型不仅分析了带有铺层角度的缝合层合板的面内力学属性，还为以后加筋缝合夹芯结构的动力学研究奠定基础。

关键词: 缝合复合材料层合板, 面内力学属性, 叠加效应, 铺层角度, 结构各向异性

Abstract: A representative volume element method and a novel mesomechanical-based polyline model are proposed to describe the misalignment of in-plane fibers induced by the insertion of stitch thread. A multi-scale mathematical model of in-plane elastic parameters for stitched composite laminate is established with ply-angle and stitch parameters as well as material parameters taken into account. Based on the fabrication of specimens and the verification of experimental platform, the superposition influences of stitch on structural anisotropy are revealed by the developed theoretical model. Results indicate that the stitch orientation can increase the structural anisotropy. The decreases of stitch pitch and spacing as well as the increase of thread diameter obviously reduce the elastic and shear moduli of laminates. Furthermore, the elastic and shear moduli as well as Poisson’s ratios show sinusoidal changes with a period of 90° as the ply-angle increases. The theoretical model not only analyzes the in-plane mechanical properties of stitched laminate with ply-angle, but also lays a foundation for the dynamic studies of stitched sandwich structures with ribs in the future.

中图分类号:

TB 332

袁丽华, 梁森, 闫盛宇. 缝合平纹编织复合材料层合板的面内弹性属性[J]. J Shanghai Jiaotong Univ Sci, 2023, 28(2): 220-232.

YUAN Lihua (袁丽华), LIANG Sen∗ (梁森), YAN Shengyu (闫盛宇). In-Plane Elastic Properties of Stitched Plain Weave Composite Laminate[J]. J Shanghai Jiaotong Univ Sci, 2023, 28(2): 220-232.

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缝合平纹编织复合材料层合板的面内弹性属性

In-Plane Elastic Properties of Stitched Plain Weave Composite Laminate

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