Twist induced plasticity and failure mechanism of helical carbon nanotube fibers under different strain rates

Wang Pengfei; Yang Jinglei; Sun Gengzhi; Zhang Xin; Zhang He; Zheng Yuxuan; Xu Songlin

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Twist induced plasticity and failure mechanism of helical carbon nanotube fibers under different strain rates

机译：不同应变率下螺旋碳纳米管纤维的扭曲诱导的可塑性和失效机理

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Twist has been well identified as an effective parameter to tune the mechanical behavior of carbon nanotube (CNT) fibers, e.g., tensile strength, strain, modulus and elastic-plastic behaviors. In this contribution, we uncover the twist-induced plastic deformation and failure behaviors of CNT fibers shrunk by ethanol (E-CNT fiber) and polyvinyl alcohol (P-CNT) solutions under low strain rate of 0.001 s(-1) and high strain rate of 1300 s(-1), which are essentially important for designing high-performance composites with respect to long term stability and short-term collision, respectively. It is found that the strain-induced microstructural evolution processes of CNT fibers depends on twist angle as a result of the strengthening effect of inter-CNT friction and the weakening effect of CNT obliquity. The tensile strength, failure strain and modulus of CNT fibers are more sensitive to strain rate as the twist angle increases. The optimum twist angle provides not only the higher tensile strength, but also the better data repeatability. The numerical results reveal that the brittle/ductile properties of filaments and their interfacial interaction will contribute to the plastic behaviors of a twist fiber. The empirical constitutive equations were built to describe the stress-strain curves of CNT fibers by taking the strain, helical geometry, twist-induced damage and strain rate into consideration.

机译：扭曲已被充分识别为调整碳纳米管（CNT）纤维的力学行为的有效参数，例如拉伸强度，应变，模量和弹性塑性行为。在这一贡献中，我们在低应变率为0.001 s（-1）和高菌株的低应变率下，我们发现CNT纤维的扭曲诱导的CNT纤维的塑性变形和失效行为缩小了乙醇（E-CNT纤维）和聚乙烯醇（P-CNT）溶液1300秒（-1）的速率，对于设计关于长期稳定性和短期碰撞的高性能复合材料来说基本重要。结果发现CNT纤维的应变诱导的微观结构演化过程取决于CNT间摩擦的强化效果和CNT倾斜度的弱化效果的结果。随着扭转角度的增加，CNT纤维的拉伸强度，失效应变和模量对应变速率更敏感。最佳的扭转角不仅提供较高的拉伸强度，而且提供更好的数据重复性。数值结果表明，长丝的脆性/延展性及其界面相互作用将有助于扭曲纤维的塑性行为。构建了经验构成型方程，以通过考虑应变，螺旋几何，扭曲引起的损伤和应变率来描述CNT纤维的应力 - 应变曲线。

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来源
《International Journal of Plasticity》 |2018年第2018期|共21页
作者
Wang Pengfei; Yang Jinglei; Sun Gengzhi; Zhang Xin; Zhang He; Zheng Yuxuan; Xu Songlin;
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作者单位

Univ Sci &

Technol China Dept Modern Mech CAS Key Lab Mech Behav &

Design Mat Hefei 230027 Anhui Peoples R China;

Hong Kong Univ Sci &

Technol Dept Mech &

Aerosp Engn Hong Kong Hong Kong Peoples R China;

Nanjing Tech Univ NanjingTech Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM Key Lab Flexible Elect KLOFE Nanjing 211816 Jiangsu Peoples R China;

Nanyang Technol Univ Sch Mech &

Aerosp Engn 50 Nanyang Ave Singapore 639798 Singapore;

South China Univ Technol Key Lab Polymer Proc Engn Minist Educ Natl Engn Res Ctr Novel Equipment Polymer Proc Guangzhou 510641 Guangdong Peoples R China;

Ningbo Univ MOE Key Lab Impact &

Safety Engn Ningbo 315211 Zhejiang Peoples R China;

Univ Sci &

Technol China Dept Modern Mech CAS Key Lab Mech Behav &

Design Mat Hefei 230027 Anhui Peoples R China;

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原文格式 PDF
正文语种 eng
中图分类塑性力学;
关键词
Twist; Strain rate; Helical structure; Constitutive equation; Simulation model;

机译：扭曲;应变率;螺旋结构;本构方程;仿真模型;

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专利

1. Twist induced plasticity and failure mechanism of helical carbon nanotube fibers under different strain rates [J] . Wang Pengfei, Yang Jinglei, Sun Gengzhi, International Journal of Plasticity . 2018,第期

机译：不同应变率下螺旋碳纳米管纤维的扭曲诱导的可塑性和失效机理
2. Strengthening and failure mechanisms of individual carbon nanotube fibers under dynamic tensile loading [J] . Wang Pengfei, Zhang Xin, Hansen Reinack Varghese, Carbon: An International Journal Sponsored by the American Carbon Society . 2016,第Null期

机译：动态拉伸载荷作用下单个碳纳米管纤维的增强和破坏机理
3. Strengthening and failure mechanisms of individual carbon nanotube fibers under dynamic tensile loading [J] . Wang Pengfei, Zhang Xin, Hansen Reinack Varghese, Carbon: An International Journal Sponsored by the American Carbon Society . 2016,第Null期

机译：动态拉伸载荷作用下单个碳纳米管纤维的增强和破坏机理
4. MECHANISMS OF STRAIN INDUCED ALIGNMENT OF CARBON NANOTUBES (CNT): PROCESS SCALE-UP AND QUASI-CONTINUOUS HIGHLY ALIGNED CNT MATERIAL [C] . R. Downes, S. Wang, D. Haldane, International Conference on Composite Materials . 2013

机译：碳纳米管（CNT）的应变诱导对准机制：工艺展示和准连续高度对准的CNT材料
5. Failure Mechanisms of Ultra High Molar Mass Polyethylene Single Fibers at Extreme Temperatures and Strain-Rates [D] . Jenket, Donald Robert, II. 2017

机译：超高摩尔质量聚乙烯单纤维在极端温度和应变率下的失效机理
6. Comparison of the Level and Mechanisms of Toxicity of Carbon Nanotubes Carbon Nanofibers and Silicon Nanotubes in Bioassay with Four Marine Microalgae [O] . Konstantin Pikula, Vladimir Chaika, Alexander Zakharenko, 2020

机译：四种海洋微藻生物测定中碳纳米管碳纳米纤维和硅纳米管毒性水平和机理的比较
7. Multi-walled carbon nanotubes induce visceral mesothelial proliferation in rats. An enlarged picture around the ligand is shown. Scanning electron microscope observation demonstrates the existence of the multi-walled carbon nanotube fibers in the cell pel [O] . Jiegou Xu, Mitsuru Futakuchi, Hideo Shimizu, 2012

机译：多壁碳纳米管在大鼠中诱导内脏阶段增殖。显示了配体周围的放大图片。扫描电子显微镜观察表明，在细胞壁下存在多壁碳纳米管纤维的存在
8. Elastic Response and Failure Studies of Multi-Wall Carbon Nanotube Twisted Yarns. [R] . Gates, T. S., Jefferson, G. D., Frankland, S. J. V. 2007

机译：多壁碳纳米管扭曲纱的弹性响应与失效研究。

Twist induced plasticity and failure mechanism of helical carbon nanotube fibers under different strain rates

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