On the behaviour of flattened tubular Bi-axial and Tri-axial braided composites in tension

Gautam M.; Sivakumar S.; Barnett A.; Barbour S.; Ogin S. L.; Potluri P.

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On the behaviour of flattened tubular Bi-axial and Tri-axial braided composites in tension

机译：关于扁平管式双轴和三轴编织复合材料张力的行为

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The effect of braid angle and number of axial tow insertions on the behavior of flattened tubular braided composites (carbon fibre/epoxy resin) has been investigated. Two type of braids i.e. bi-axial and tri-axial (i.e. 6 and 12 inserted axial tows), for three braid angles (35 degrees, 45 degrees and 55 degrees), have been studied. The stress-strain curve for the bi-axial braided composites is pseudo-ductile in nature, with a smooth transition into a plateau region at low strains, accompanied by necking of the composite. By contrast, the tri-axial braided composites show an initially high peak stress, related to the deformation and fracture of the axial tows, and subsequent plateau like behaviour accompanied by neck formation, the extent of which appears to be determined by the strainto-failure of the composite. For the bi-axial braids, an increase in braid angle produced decreased strength, axial modulus and specific energy absorption, but an increase in strain to failure. Inserted axial tows produced increased strengths and Young's moduli, but a decrease in specific energy absorption (except for 55 degrees) and strain to failure. In all cases, the braided composites outperformed the specific energy absorption of aluminium.

机译：已经研究了编织角度和轴向牵引件的数量对扁平管状编织复合材料（碳纤维/环氧树脂）的行为进行研究。已经研究了两种类型的编织物等于三个编织角（35度，45度和55度）的双轴和三轴（即6和12插入轴向轨道）。用于双轴编织复合材料的应力 - 应变曲线是本质上的假延性，在低菌株的高原区域中伴随着伴有复合材料的颈部的平滑过渡。相反，三轴编织复合材料显示出初始高峰应力，与轴向轨道的变形和断裂有关，随后的高原等特性伴随着颈部形成，其程度似乎通过方向室失效确定复合材料。对于双轴编织，编织角度的增加产生的强度降低，轴向模量和特定能量吸收，而是对失效的应变增加。插入的轴向拖动产生了增加的强度和杨氏的模态，但特定能量吸收（55度除外）降低，并且失效。在所有情况下，编织复合材料表现优于铝的特定能量吸收。

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来源
《Composite Structures》 |2021年第4期|113325.1-113325.10|共10页
作者
Gautam M.; Sivakumar S.; Barnett A.; Barbour S.; Ogin S. L.; Potluri P.;
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作者单位

Univ Manchester Northwest Composites Ctr Dept Mat Robot & Text Composite Grp Manchester M1 3NJ Lancs England|Composite Braiding Ltd iHub Infin Pkwy Derby DE24 9FU England;

Univ Manchester Northwest Composites Ctr Dept Mat Robot & Text Composite Grp Manchester M1 3NJ Lancs England;

Composite Braiding Ltd iHub Infin Pkwy Derby DE24 9FU England;

Composite Braiding Ltd iHub Infin Pkwy Derby DE24 9FU England;

Univ Surrey Dept Mech Engn Sci Guildford GU2 7XH Surrey England;

Univ Manchester Northwest Composites Ctr Dept Mat Robot & Text Composite Grp Manchester M1 3NJ Lancs England;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
Braid angle; Bi-axial; Tri-axial; Necking; Pseudo-ductility; Specific energy absorption;

机译：辫子角;双轴;三轴;颈缩;伪延展性;特定能量吸收;

On the behaviour of flattened tubular Bi-axial and Tri-axial braided composites in tension

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