Compression and recovery of carbon nanotube forests described as a phase transition

Liang, Xiaojun; Shin, Junsoo; Magagnosc, Daniel J.; Jiang, Yijie; Park, Sei Jin; Hart, A. J.; Turner, Kevin T.; Gianola, Daniel S.; Purohit, Prashant K.

doi:10.1016/j.ijsolstr.2017.06.025

Cited by 27 publications

(22 citation statements)

References 55 publications

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“…40,83 Incorporating this scaling into eqn 1 is consistent with the experimental Mode I E values (∼6.14 ± 1.7 MPa) in the expected range of 1−10 MPa based on prior work for similar CVD-grown aligned CNT arrays. 30,42,46,84,85 In Mode I, significant moduli variations are not expected due to the minimal changes in carbon character. It is noted that this effective array modulus, and not the orders-of-magnitude higher intrinsic CNT axial elastic modulus of 1 TPa 86 governs the bulk CNT array's interfacial behavior, similar to the mechanics governing the capillary densification of CNT arrays, for which CNT-substrate adhesion is an important consideration.…”

Section: Cnt-substrate Adhesion: Experimental and Modeling Resultsmentioning

confidence: 99%

Substrate adhesion evolves non-monotonically with processing time in millimeter-scale aligned carbon nanotube arrays

et al. 2021

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Section: Cnt-substrate Adhesion: Experimental and Modeling Resultsmentioning

confidence: 99%

Substrate adhesion evolves non-monotonically with processing time in millimeter-scale aligned carbon nanotube arrays

et al. 2021

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“…It should be pointed out that tension [2,[16][17][18][19][20][21] and compression [26][27][28][29][30][31][32][33] of vertically aligned CNT brushes and forests have been extensively studied. Note that CNTs grow in vertical direction and compression of vertically aligned CNTs means that they are compressed along their axis, while compression of horizontally aligned CNTs means that they are compressed normal to their axis.…”

Section: Introductionmentioning

confidence: 99%

Elastic Damper Based on the Carbon Nanotube Bundle

Rysaeva¹,

Korznikova²,

Мурзаев³

et al. 2020

FU Mech Eng

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Mechanical response of the carbon nanotube bundle to uniaxial and biaxial lateral compression followed by unloading is modeled under plane strain conditions. The chain model with a reduced number of degrees of freedom is employed with high efficiency. During loading, two critical values of strain are detected. Firstly, period doubling is observed as a result of the second order phase transition, and at higher compressive strain, the first order phase transition takes place when carbon nanotubes start to collapse. The loading-unloading stress-strain curves exhibit a hysteresis loop and, upon unloading, the structure returns to its initial form with no residual strain. This behavior of the nanotube bundle can be employed for the design of an elastic damper.

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“…Mechanical properties of vertically aligned CNT forests and brushes have been tested with respect to tension [7,[22][23][24][25][26][27] and compression [34][35][36][37][38][39][40][41]. Lateral compression of CNT bundles or isolated CNTs is also of interest [42][43][44][45][46].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Response of Carbon Nanotube Bundle to Lateral Compression

et al. 2020

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Structure evolution and mechanical response of the carbon nanotube (CNT) bundle under lateral biaxial compression is investigated in plane strain conditions using the chain model. In this model, tensile and bending rigidity of CTN walls, and the van der Waals interactions between them are taken into account. Initially the bundle in cross section is a triangular lattice of circular zigzag CNTs. Under increasing strain control compression, several structure transformations are observed. Firstly, the second-order phase transition leads to the crystalline structure with doubled translational cell. Then the first-order phase transition takes place with the appearance of collapsed CNTs. Further compression results in increase of the fraction of collapsed CNTs at nearly constant compressive stress and eventually all CNTs collapse. It is found that the potential energy of the CNT bundle during deformation changes mainly due to bending of CNT walls, while the contribution from the walls tension-compression and from the van der Waals energies is considerably smaller.

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Compression and recovery of carbon nanotube forests described as a phase transition

Cited by 27 publications

References 55 publications

Substrate adhesion evolves non-monotonically with processing time in millimeter-scale aligned carbon nanotube arrays

Substrate adhesion evolves non-monotonically with processing time in millimeter-scale aligned carbon nanotube arrays

Elastic Damper Based on the Carbon Nanotube Bundle

Mechanical Response of Carbon Nanotube Bundle to Lateral Compression

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