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首页> 外文期刊>Vlakna a Textil >FUNCTIONAL CHARACTERISTIC EVALUATION OF 3-DIMENSIONAL KNITTED SPACER FABRICS
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FUNCTIONAL CHARACTERISTIC EVALUATION OF 3-DIMENSIONAL KNITTED SPACER FABRICS

机译：三维编织间隔织物的功能特性评估

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摘要

Nowadays, the utilization of 3-Dimensional (3D) porous textile materials by the civil and mechanical engineers for improved acoustical environment and shear behavior during composite forming has widened the research scope. Since spacer textile fabrics have superior functional characteristics such as acoustical, thermal and shear characteristics compared to conventional woven/knitted structures or nonwovens due to their wonderful 3D sandwich pattern and porous nature. Hence this research paper presents an experimental evaluation on the sound absorption behavior and in-plane properties of 3D knitted spacer fabrics. The Sound absorption coefficient (SAC) was measured using two microphone impedance tube. Moreover, tortuosity of the spacer fabrics was carefully calculated analytically and compared with experimental results. This study deeply discusses the influence of material parameters and characteristics on acoustical properties of 3D spacer knitted fabrics. The results show that the fabric surface property, porosity, flow resistivity and tortuosity have significant effects on the sound absorbability. Also, a fixture was designed to analyze the intra-ply shear properties of these fabrics. The nonlinear behavior of shear force versus shear angle and the deformation mechanism were analyzed. The curves for shear force versus shear angle and position of buckling for intra-ply shear test are recorded. Load-displacement curves of intra-ply shear tests are also analyzed. In addition to this, a program was developed in MATLAB using Hough transform to analyze the shear angle in the real-time image taken during displacement of specimen at various positions. These findings are important requirement for the further improvements in designing of picture frame fixture and to study the in-plane shear properties of 3D fabrics.
机译：如今，土木和机械工程师利用3维（3D）多孔纺织材料改善复合材料成型过程中的声学环境和剪切性能，已扩大了研究范围。由于间隔织物​​具有出色的3D三明治图案和多孔性，因此与常规机织/编织结构或非织造材料相比，具有出色的功能特性，例如声学，热和剪切特性。因此，本研究论文对3D针织间隔织物的吸声性能和面内性能进行了实验评估。使用两个麦克风阻抗管测量吸声系数（SAC）。此外，对间隔织物的曲折度进行了仔细的分析计算，并与实验结果进行了比较。这项研究深入讨论了材料参数和特性对3D间隔针织物声学特性的影响。结果表明，织物的表面性质，孔隙率，流动阻力和曲折度对吸声性有显着影响。此外，还设计了一种夹具来分析这些织物的层间剪切性能。分析了剪切力与剪切角的非线性关系以及变形机理。记录用于层内剪切测试的剪切力对剪切角和屈曲位置的曲线。还分析了层内剪切试验的载荷-位移曲线。除此之外，在MATLAB中使用霍夫变换（Hough transform）开发了一个程序，以分析在各个位置移动样本期间所拍摄的实时图像中的剪切角。这些发现对于进一步改善相框固定装置的设计以及研究3D织物的面内剪切特性是重要的要求。

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  • 来源
    《Vlakna a Textil》 |2017年第1期|39-45|共7页
  • 作者

    Veerakumar Arumugam; Rajesh Mishra; Jana Salacova; Mohanapriya Venkatraman; Dana Kremenakova; Hafsa Jamshaid; Tao Yang; Xiaoman Xiong; Kasthuri Venkatesh; Jiri Militky;

  • 作者单位

    Dept. of Materials Engineering, Technical University of Liberec, 461 17 Liberec, Czech Republic;

    Dept. of Materials Engineering, Technical University of Liberec, 461 17 Liberec, Czech Republic;

    Dept. of Materials Engineering, Technical University of Liberec, 461 17 Liberec, Czech Republic;

    Dept. of Materials Engineering, Technical University of Liberec, 461 17 Liberec, Czech Republic;

    Dept. of Materials Engineering, Technical University of Liberec, 461 17 Liberec, Czech Republic;

    Dept. of Materials Engineering, Technical University of Liberec, 461 17 Liberec, Czech Republic;

    Dept. of Materials Engineering, Technical University of Liberec, 461 17 Liberec, Czech Republic;

    Dept. of Materials Engineering, Technical University of Liberec, 461 17 Liberec, Czech Republic;

    Dept. of Materials Engineering, Technical University of Liberec, 461 17 Liberec, Czech Republic;

    Dept. of Materials Engineering, Technical University of Liberec, 461 17 Liberec, Czech Republic;

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  • 正文语种 eng
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  • 关键词

    Sound absorption; 3D spacer knitted fabrics; shear; tortuosity; porosity; acoustic property;

    机译：吸声;3D间隔针织物;剪切力;曲率;孔隙率;声学性能;

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