Identification of elastic properties of interphase and interface in graphene-polymer nanocomposites by atomistic simulations

X Lu, F Detrez, J Yvonnet, J Bai - Composites Science and Technology, 2021 - Elsevier
This article tackles the problem of identification of elastic continuum model by atomistic
simulations for graphene polymer nanocomposite. The Atomistic Local IdentificAtion of …

The atomistic representation of first strain-gradient elastic tensors

NC Admal, J Marian, G Po - Journal of the Mechanics and Physics of Solids, 2017 - Elsevier
We derive the atomistic representations of the elastic tensors appearing in the linearized
theory of first strain-gradient elasticity for an arbitrary multi-lattice. In addition to the classical …

The non-uniqueness of the atomistic stress tensor and its relationship to the generalized Beltrami representation

NC Admal, EB Tadmor - Journal of the Mechanics and Physics of Solids, 2016 - Elsevier
The non-uniqueness of the atomistic stress tensor is a well-known issue when defining
continuum fields for atomistic systems. In this paper, we study the non-uniqueness of the …

[HTML][HTML] Atomic-scale mutual integrals for mixed-mode fracture: Abnormal fracture toughness of grain boundaries in graphene

NT Mai, ST Choi - International Journal of Solids and Structures, 2018 - Elsevier
In this study, we developed a computational scheme based on the atomic-level J-based
mutual integral (or two-state conservation integral) to analyze the mixed-mode fracture along …

Finite-temperature stress calculations in atomic models using moments of position

R Parthasarathy, A Misra… - Journal of Physics …, 2018 - iopscience.iop.org
Continuum modeling of finite temperature mechanical behavior of atomic systems requires
refined description of atomic motions. In this paper, we identify additional kinematical …

Atomic-scale mode separation for mixed-mode intergranular fracture in polycrystalline metals

NT Mai, PQ Phi, VP Nguyen, ST Choi - Theoretical and Applied Fracture …, 2018 - Elsevier
In intergranular fractures, cracks tend to propagate along grain boundaries (GBs) even
under mixed-mode loadings. To quantitatively characterize the mixed-mode intergranular …

[HTML][HTML] On the Cauchy-Born approximation at finite temperature for alloys

S Dai, F Wang, JZ Yang, C Yuan - Discrete and Continuous …, 2022 - aimsciences.org
In this paper, we present the procedure of generalization and implementation of the Cauchy-
Born approximation to the calculation of stress at finite temperature for alloy system in which …

Atomic mixed-mode cohesive-zone dual constitutive laws of impurity-embrittled grain boundaries in polycrystalline solids via nanoscale field projection method

VP Nguyen, NT Mai, ST Choi - Journal of the Mechanics and Physics of …, 2021 - Elsevier
Atomic-scale mixed-mode intergranular fracture, featured by non-local non-linear discrete
atomic debonding processes near a crack tip along a grain boundary (GB), is modeled with …

Noise filtering in atomistic stress calculations for crystalline materials

M Shi, NC Admal, EB Tadmor - Journal of the Mechanics and Physics of …, 2020 - Elsevier
Spatially-varying stress fields can be obtained from atomistic simulations as weighted
averages over a phase function that depends on the positions and momenta of the atoms …

[HTML][HTML] Continuum balances from extended Hamiltonian dynamics

GG Giusteri, P Podio-Guidugli, E Fried - The Journal of Chemical …, 2017 - pubs.aip.org
The classical procedure devised by Irving and Kirkwood in 1950 and completed slightly later
by Noll produces counterparts of the basic balance laws of standard continuum mechanics …