Study on Crack Resistance Mechanism of Helical Carbon Nanotubes in Nanocomposites
Helical carbon nanotubes (HCNTs) with different geometrical properties were constructed and incorporated into nanocomposites for the investigation of the anti-crack mechanism. The interfacial mechanical properties of the nanocomposites reinforced with straight carbon nanotubes and various types of H...
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| Language: | English |
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MDPI AG
2025-01-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/15/2/119 |
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| author | Zhiwu Bie Xuefeng Liu Yajie Deng Xian Shi Xiaoqiao He |
| author_facet | Zhiwu Bie Xuefeng Liu Yajie Deng Xian Shi Xiaoqiao He |
| author_sort | Zhiwu Bie |
| collection | DOAJ |
| description | Helical carbon nanotubes (HCNTs) with different geometrical properties were constructed and incorporated into nanocomposites for the investigation of the anti-crack mechanism. The interfacial mechanical properties of the nanocomposites reinforced with straight carbon nanotubes and various types of HCNTs were investigated through the pullout of HCNTs in the crack propagation using molecular dynamics (MD). The results show that the pullout force of HCNTs is much higher than that of CNTs because the physical interlock between HCNTs and matrices is much stronger than the van der Waals (vdW) interactions between CNTs and matrices. Remarkably, HCNTs with a large pitch length can not only effectively prevent the initiation of breakages but also hinder the growth of cracks, while HCNTs with a small diameter and tube radius cannot even effectively prevent the initiation of cracks, which is similar to straight CNTs. Moreover, the shear resistance of HCNTs increases with the increase in the helix angle, which remains at a high level when the helix angle reaches the critical value. However, HCNTs with a small helix angle and large diameter can carry out more polymer chains, while snake-like HCNTs and HCNTs with a small diameter and helix angle can hardly carry out any polymer chain during the pullout process and show similar interfacial properties to the straight CNTs. |
| format | Article |
| id | doaj-art-c972fdbdb204405fb0269ea9405ca0ee |
| institution | Kabale University |
| issn | 2079-4991 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj-art-c972fdbdb204405fb0269ea9405ca0ee2025-01-24T13:44:12ZengMDPI AGNanomaterials2079-49912025-01-0115211910.3390/nano15020119Study on Crack Resistance Mechanism of Helical Carbon Nanotubes in NanocompositesZhiwu Bie0Xuefeng Liu1Yajie Deng2Xian Shi3Xiaoqiao He4Department of Architecture and Civil Engineering, City University of Hong Kong, Tat Chee Avenue, Hong KongCollege of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang 443002, ChinaSchool of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, ChinaSchool of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215009, ChinaDepartment of Architecture and Civil Engineering, City University of Hong Kong, Tat Chee Avenue, Hong KongHelical carbon nanotubes (HCNTs) with different geometrical properties were constructed and incorporated into nanocomposites for the investigation of the anti-crack mechanism. The interfacial mechanical properties of the nanocomposites reinforced with straight carbon nanotubes and various types of HCNTs were investigated through the pullout of HCNTs in the crack propagation using molecular dynamics (MD). The results show that the pullout force of HCNTs is much higher than that of CNTs because the physical interlock between HCNTs and matrices is much stronger than the van der Waals (vdW) interactions between CNTs and matrices. Remarkably, HCNTs with a large pitch length can not only effectively prevent the initiation of breakages but also hinder the growth of cracks, while HCNTs with a small diameter and tube radius cannot even effectively prevent the initiation of cracks, which is similar to straight CNTs. Moreover, the shear resistance of HCNTs increases with the increase in the helix angle, which remains at a high level when the helix angle reaches the critical value. However, HCNTs with a small helix angle and large diameter can carry out more polymer chains, while snake-like HCNTs and HCNTs with a small diameter and helix angle can hardly carry out any polymer chain during the pullout process and show similar interfacial properties to the straight CNTs.https://www.mdpi.com/2079-4991/15/2/119helical carbon nanotubesnanocompositescrack resistancemolecular dynamics |
| spellingShingle | Zhiwu Bie Xuefeng Liu Yajie Deng Xian Shi Xiaoqiao He Study on Crack Resistance Mechanism of Helical Carbon Nanotubes in Nanocomposites Nanomaterials helical carbon nanotubes nanocomposites crack resistance molecular dynamics |
| title | Study on Crack Resistance Mechanism of Helical Carbon Nanotubes in Nanocomposites |
| title_full | Study on Crack Resistance Mechanism of Helical Carbon Nanotubes in Nanocomposites |
| title_fullStr | Study on Crack Resistance Mechanism of Helical Carbon Nanotubes in Nanocomposites |
| title_full_unstemmed | Study on Crack Resistance Mechanism of Helical Carbon Nanotubes in Nanocomposites |
| title_short | Study on Crack Resistance Mechanism of Helical Carbon Nanotubes in Nanocomposites |
| title_sort | study on crack resistance mechanism of helical carbon nanotubes in nanocomposites |
| topic | helical carbon nanotubes nanocomposites crack resistance molecular dynamics |
| url | https://www.mdpi.com/2079-4991/15/2/119 |
| work_keys_str_mv | AT zhiwubie studyoncrackresistancemechanismofhelicalcarbonnanotubesinnanocomposites AT xuefengliu studyoncrackresistancemechanismofhelicalcarbonnanotubesinnanocomposites AT yajiedeng studyoncrackresistancemechanismofhelicalcarbonnanotubesinnanocomposites AT xianshi studyoncrackresistancemechanismofhelicalcarbonnanotubesinnanocomposites AT xiaoqiaohe studyoncrackresistancemechanismofhelicalcarbonnanotubesinnanocomposites |