Carbon Nanotube/Carbon Fiber Multiscale Composite: Influence of Interfacial Strength on Mechanical Properties

Nie, Jiaqi; Jia, Yuxi; Qu, Peng; Shi, Qiurong

doi:10.1007/s10904-011-9565-8

Cited by 19 publications

(4 citation statements)

References 29 publications

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“…Mainly, there are three kinds of mesoscopic-level representative volume elements (RVEs) for the study on the mechanical response of aligned CNT reinforced composites: cylindrical RVE, square RVE and hexagonal RVE. Nie [4] and Liu [10] considered that the square RVE might be the preferred model for obtaining the most accurate results among the three RVEs. As shown in Fig.…”

Section: Numerical Modelmentioning

confidence: 99%

“…In the square RVE shown in Fig. 1, the CNT volume fraction is 1.27%, and the CNT and epoxy resin are considered as homogeneous and isotropic materials with the elastic modulus and Poisson's ratio being [4] : E CNT =1TPa, υ CNT =0.3, E epoxy =3GPa, and υ epoxy =0.3. For the cuboid epoxy matrix, the geometrical dimensions are 220nm×60nm×60nm.…”

Section: Numerical Modelmentioning

confidence: 99%

“…Since the observation by Iijima in 1991 [1] , carbon nanotubes (CNTs) have led to a wave of discoveries in most areas of science and engineering due to their unprecedented physical and chemical properties, such as excellent mechanical, outstanding electrical and exceedingly good thermal properties [2,3] . Taking into consideration of their densities that can be as low as 1.3 g/cm 3 and their high Young's modulus, strength and toughness, CNTs are identified as an ideal reinforcement for nano-composites [4,5] . However, the past experimental studies had not achieved desired results because of the poor dispersion, irregular alignment and low interfacial strength in the nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

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Toughness Enhancement by Aligned Multi-Walled Carbon Nanotubes Pullout from Polymer Matrix of Multi-Scale Composites

Guo

Zhu

et al. 2013

KEM

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There have been tremendous researches on carbon nanotubes (CNTs) and CNTs reinforced composites due to their excellent mechanical, electromagnetical and thermal properties. Radially aligned multi-walled CNTs grown in situ on the surface of carbon fiber or its woven fabric by the chemical vapor deposition method not only provide the significant three-dimensional reinforcement, but also overcome the poor dispersion of nanostructures. In order to investigate how the aligned multi-walled CNTs affect the mechanical properties of the multi-scale composites, a representative volume element is used to simulate the multi-walled CNT pullout process by means of the finite element method. Related influencing factors are taken into consideration: CNT length, CNT Youngs modulus, and the shear strength of the interface between multi-walled CNTs and epoxy matrix, which is characterized by a cohesive zone model. The results reveal that the aligned multi-walled CNTs make a significant contribution to the fracture toughness of the multi-scale composites, and the CNT/epoxy composites with high toughness require relatively high interfacial shear strength, reasonable CNT length and Youngs modulus. The study is helpful for the optimal design of multi-scale composites.

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Section: Numerical Modelmentioning

confidence: 99%

Section: Numerical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Toughness Enhancement by Aligned Multi-Walled Carbon Nanotubes Pullout from Polymer Matrix of Multi-Scale Composites

Guo

Zhu

et al. 2013

KEM

Self Cite

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“…Moreover, the author concludes that in large strains the creation of chemical covalent bonds tends to increase the interface adhesion leading to an improved behavior of the composite. Nie et al [118] also used the CZM approach to simulate the interface and found out that an increase of the interfacial strength results to an increase of the longitudinal elastic modulus. Jia et al [79] studied the bridging effect of CNT-RCs by developing a CNT pullout model using FEM.…”

Section: Analytical/numerical Modeling Of Cnt-rcsmentioning

confidence: 99%

Multiscale analysis of nano-composites using surrogate models

Σοϊμοίρης¹

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Η παρούσα διδακτορική διατριβή μελετά την ανάπτυξη υποκατάστατων μοντέλα με χρήση νευρωνικών δικτύων για την μοντελοποίηση της γεωμετρικώς μη-γραμμικής συμπεριφοράς νανοσωλήνων άνθρακα. Για τον σκοπό αυτό, προτείνεται η μέθοδος του ισοδύναμου στοιχείου δοκού με νευρωνικά δίκτυα, η οποία είναι ικανή να προβλέψει φαινόμενα δεύτερης τάξης που παρουσιάζουν οι νανοσωλήνες άνθρακα στην νανο-κλίμακα και που μπορούν μέχρι στιγμής να προβλεφθούν μόνο από λεπτομερή μικρομηχανικά μοντέλα. Η βασική ιδέα είναι να προσεγγιστεί το διάνυσμα των υπολοιπόμενων δυνάμεων των πεπερασμένων στοιχείων δοκού Euler ή Timoshenko, κατά την επαναληπτική διαδικασία επίλυσης μη-γραμμικών συστημάτων Newton-Raphson, μέσω ενός νευρωνικού δικτύου, το οποίο βασίζεται στην συμπεριφορά του λεπτομερούς μοντέλου της Μοριακής Δομικής Μηχανικής ενός νανοσωλήνα άνθρακα. Επιπλέον, αναπτύσσεται μια στοχαστική μη-γραμμική μέθοδος για την υπολογιστική ομογενοποίηση στα πλαίσια της ανάλυσης πολλαπλών κλιμάκων, για την εξαγωγή ενός μη-γραμμικού καταστατικού νόμου νανο-σύνθετων υλικών από νανοσωλήνες άνθρακα. Για τον λόγο αυτό, αναλύονται με την μέθοδο των μη-γραμμικών πεπερασμένων στοιχείων στοχαστικοί - ως προς την γεωμετρία των νανοσωλήνων άνθρακα - πεπερασμένοι όγκοι του νανο-σύνθετου υλικο. Στα πλαίσια αυτών των αναλύσεων, για να ληφθεί υπόψη η σχετική ολίσθηση μεταξύ των νανοσωλήνων άνθρακα και του υλικού της μήτρας, δηλ. η διεπιφάνεια ή διεπαφή μεταξύ των δύο υλικών, αναπτύσσεται ένα επιπλέον στοιχείου δοκού - το ενσωματωμένο-συνεκτικό στοιχείο δοκού, το οποίο βασίζεται στην θεωρία της συνεκτικής ζώνης.

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Hierarchical Composites Containing Carbon Nanotubes

Shofner

2015

Hybrid and Hierarchical Composite Materials

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Carbon Nanotube/Carbon Fiber Multiscale Composite: Influence of Interfacial Strength on Mechanical Properties

Cited by 19 publications

References 29 publications

Toughness Enhancement by Aligned Multi-Walled Carbon Nanotubes Pullout from Polymer Matrix of Multi-Scale Composites

Toughness Enhancement by Aligned Multi-Walled Carbon Nanotubes Pullout from Polymer Matrix of Multi-Scale Composites

Multiscale analysis of nano-composites using surrogate models

Hierarchical Composites Containing Carbon Nanotubes

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