A distinct element method for large scale simulations of carbon nanotube assemblies

Ostanin, Igor; Ballarini, Roberto; Potyondy, D.O.; Dumitrică, Traian

doi:10.1016/j.jmps.2012.10.016

Cited by 65 publications

(102 citation statements)

References 55 publications

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“…The PFC model is a distinct element modeling approach that encompasses both granular and solid materials, and has also been applied to simulate carbon nanotube systems by Ostanin, Ballarini, Potyondy, and Dumitrica (2013). The historical background and characteristic features of the approach are discussed in Lemos (2011).…”

Section: Development and Applicationmentioning

confidence: 99%

The bonded-particle model as a tool for rock mechanics research and application: current trends and future directions

Potyondy

2015

Geosystem Engineering

319

129

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We generalize our view of a bonded-particle model (BPM) to consist of a base material (that is a packed assembly of rigid grains joined by deformable and breakable cement at grain -grain contacts) to which larger-scale joints can be added and whose mechanical behavior is simulated by the distinct-element method using the two-and three-dimensional discontinuum programs PFC2D and PFC3D. The micromechanical processes that control brittle fracture, and thus, should inform any micromechanical theory or model, are summarized. The rich variety of microstructural models that can be produced by the bonded-particle modeling methodology are described and classified with respect to their microstructural and larger-scale features. These models provide a wide range of rock behaviors that encompass both compact and porous rock at both an intact and rock-mass scale, and examples are provided of how BPMs are being used to model rock at these scales. The examples include an intact anisotropic material that may swell and contract in response to changes in saturation, the behavior of two alternative BPMs that can match both the uniaxial and tensile strengths of compact rock and the embedding of an intact BPM within a larger continuum model to study fracturing around a gold-mine stope in quartzite.

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Section: Development and Applicationmentioning

confidence: 99%

The bonded-particle model as a tool for rock mechanics research and application: current trends and future directions

Potyondy

2015

Geosystem Engineering

319

129

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“…22 These mesoscopic elements are traked in the Lagrangian frame. In the PFC3D 27 implementation, they are evolved deterministically in time as rigid bodies with a damped scheme based on a velocity Verlet algorithm for translations and a 4-th order Runge-Kutta for rotations.…”

Section: Introductionmentioning

confidence: 99%

“…22 The relative displacements of the two elements are resolved with the help of versors n and s, which are located into and 4 …”

Section: Introductionmentioning

confidence: 99%

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Twisting Carbon Nanotube Ropes with the Mesoscopic Distinct Element Method: Geometry, Packing, and Nanomechanics

et al. 2015

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The geometry and internal packing of twisted ropes composed of carbon nanotubes (CNTs) are considered, and a numerical solution in the context of the mesoscopic distinct element method (MDEM) is proposed. Compared to the state of the art, MDEM accounts in a computationally tractable manner for both the deformation of the fiber and the distributed van der Waals cohesive energy between fibers. These features enable us to investigate the torsional response in a new regime where the twisted rope develops packing rearrangements and aspect-ratio-dependent geometric nonlinearities. MDEM emerges as a robust simulation method for studying twisted agglomerates comprising semiflexible nanofibers.

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“…Continuum theory and molecular dynamics simulation strategies have been proposed in response, and have become the most popular means for exploring the buckling behavior of CNTs. In the continuum theory approach, CNTs are generally represented as the elastic beams [19], [20], elastic shells [21], [22], or with nonlocal theory [23], [24], [25] and space frame models [26], [27].…”

Section: Introductionmentioning

confidence: 99%

Buckling behavior of carbon nanotubes under bending: From ripple to kink

Wang

Liu

Al-Ghalith

et al. 2016

Carbon

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A distinct element method for large scale simulations of carbon nanotube assemblies

Cited by 65 publications

References 55 publications

The bonded-particle model as a tool for rock mechanics research and application: current trends and future directions

The bonded-particle model as a tool for rock mechanics research and application: current trends and future directions

Twisting Carbon Nanotube Ropes with the Mesoscopic Distinct Element Method: Geometry, Packing, and Nanomechanics

Buckling behavior of carbon nanotubes under bending: From ripple to kink

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