Редактирование: V-model
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[[Файл: Fig1 compos.png|450px|thumb|right| SEM image of composite consisting | [[Файл: Fig1 compos.png|450px|thumb|right| SEM image of composite consisting | ||
of nanoparticles bonded by a copolymer. (N. Preda, et. al., Mater. Res. Bull. | of nanoparticles bonded by a copolymer. (N. Preda, et. al., Mater. Res. Bull. | ||
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== Introduction == | == Introduction == | ||
− | The article is based on the | + | The article is based on the paper '''V.A. Kuzkin and I.E. Asonov "[http://pre.aps.org/abstract/PRE/v86/i5/e051301 Vector-based model of elastic bonds for simulation of granullar solids]"// Phys. Rev. E, 86, 051301, 2012'''. Author's copy can be downloaded [[Медиа: Kuzkin_2012_PRE_proof2.pdf |'''here''']]. |
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− | In the paper V.A. Kuzkin and I.E. Asonov "Vector-based model of elastic bonds for simulation of granullar solids"// Phys. Rev. E, 86, 051301, 2012 vector-based model(the V-model) of elastic bonds in solids is developed. The V-model is based on the combination of approaches proposed in works of [[П.А. Жилин | P.A. Zhilin]], E.A. Ivanova, [[А.М. Кривцов | A.M. Krivtsov]], N.F. Morozov <ref name="IvKrMoFi_2003"/>, <ref name="IvKrMo_2007"/> and works of M.P. Allen <ref name="Allen"/>, S.L Price. | + | In the paper V.A. Kuzkin and I.E. Asonov "Vector-based model of elastic bonds for simulation of granullar solids"// Phys. Rev. E, 86, 051301, 2012 vector-based model(the V-model) of elastic bonds in solids is developed. Equations describing interactions between two rigid bodies in the general case are summarized. The general expression for the potential energy of the bond is represented via vectors rigidly connected with bonded particles. The vectors are used for description of different types of bond's deformation. The expression for potential energy corresponding to tension/compression, shear, bending, and torsion of the bond is proposed. Forces and torques acting between particles are derived from the potential energy. |
+ | Two approaches for calibration of V-model parameters for bonds with different length/thickness ratios are presented. Simple analytical formulas connecting geometrical and elastic characteristics of the bond with parameters of the V-model are derived. Main aspects of numerical implementation of the model are discussed. | ||
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+ | == V-model == | ||
+ | |||
+ | The V-model is based on the combination of approaches proposed in works of [[П.А. Жилин | P.A. Zhilin]], E.A. Ivanova, [[А.М. Кривцов | A.M. Krivtsov]], N.F. Morozov <ref name="IvKrMoFi_2003"/>, <ref name="IvKrMo_2007"/> and works of M.P. Allen <ref name="Allen"/>, S.L Price. | ||
+ | The main idea is to represent potential energy of the bond as a function of vectors connected with bonded particles. | ||
{|align="center" | {|align="center" | ||
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|[[Файл:Fig2_single_bond.png|350px|thumb|center| Vectors connected with the particles]] | |[[Файл:Fig2_single_bond.png|350px|thumb|center| Vectors connected with the particles]] | ||
|[[Файл: Fig3_bond_def.png|600px|thumb|center|Different deformations of the bond.]] | |[[Файл: Fig3_bond_def.png|600px|thumb|center|Different deformations of the bond.]] | ||
− | |} | + | |} |
− | + | Different kinds of deformation of the bond and corresponding change in vectors, connected with the particles is shown below. Dashed lines show initial state of the particles. | |
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+ | Detailed description of the model and procedures for parameters calibration are given in [http://arxiv.org/abs/1202.0001 the paper]. Here let us show some results obtained using the V-model. | ||
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+ | {|align="center" | ||
+ | |-valign="top" | ||
+ | |[[Файл:Rod instability.jpg|300px|thumb|right| Rod under the action of following shear force, acting on the rod's end]] | ||
+ | |[[Файл:Plate instability.jpg|200px|thumb|right| Plate under the action of following compressive forces, acting along the edge of the plate]] | ||
+ | |[[Файл:3D rod torsion.jpg|330px|thumb|right| Torsion of 3D rod-like body]] | ||
+ | |} | ||
− | == Advantages of | + | == Advantages of V-model == |
Let us summarize advantages of V-model: | Let us summarize advantages of V-model: | ||
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* bonds can connect points inside the particles or lying on particles surfaces (not only particle centers) | * bonds can connect points inside the particles or lying on particles surfaces (not only particle centers) | ||
* fracture criterion for the bond can be used if required | * fracture criterion for the bond can be used if required | ||
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== Debugging == | == Debugging == | ||
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− | == DEM packages using | + | == DEM packages using V model == |
* [http://www.liggghts.com/ '''LIGGGHTS'''], details of implementation and some examples are given [[Implementation_of_V_model_in_LIGGGHTS | here]]. | * [http://www.liggghts.com/ '''LIGGGHTS'''], details of implementation and some examples are given [[Implementation_of_V_model_in_LIGGGHTS | here]]. | ||
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== History and acknowledgements == | == History and acknowledgements == | ||
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The authors are deeply grateful to Michael Wolff, [[А.М. Кривцов | Prof. Anton Krivtsov]], Prof. Stephan Heinrich, Dr. Sergiy Antonyuk and Prof. [http://www.williamhoover.info/ William Hoover]. | The authors are deeply grateful to Michael Wolff, [[А.М. Кривцов | Prof. Anton Krivtsov]], Prof. Stephan Heinrich, Dr. Sergiy Antonyuk and Prof. [http://www.williamhoover.info/ William Hoover]. | ||
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== References == | == References == | ||
<references> | <references> | ||
− | + | <ref name="BPM"> Potyondy D.O., Cundall P.A. A bonded-particle model for rock // Int. J. of Rock Mech. & Min. Sc., 41, (2004) pp. 1329–1364 | |
+ | </ref> | ||
+ | <ref name="Wang"> Wang Y. A new algorithm to model the dynamics of 3-D bonded rigid | ||
+ | bodies with rotations // Acta Geotechnica, 4, (2009), pp. 117–127 | ||
+ | </ref> | ||
<ref name="IvKrMoFi_2003"> E.A. Ivanova, A. M. Krivtsov, N. F. Morozov, A. D. Firsova. Decsription of crystal particle packing considering moment interactions // Mechanics of Solids. 2003. Vol. 38. No 4, pp. 101-117. | <ref name="IvKrMoFi_2003"> E.A. Ivanova, A. M. Krivtsov, N. F. Morozov, A. D. Firsova. Decsription of crystal particle packing considering moment interactions // Mechanics of Solids. 2003. Vol. 38. No 4, pp. 101-117. | ||
</ref> | </ref> | ||
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</ref> | </ref> | ||
</references> | </references> | ||
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== Links == | == Links == | ||
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* [[Vitaly Kuzkin]] | * [[Vitaly Kuzkin]] | ||
* [[Игорь Асонов | Igor Asonov]] | * [[Игорь Асонов | Igor Asonov]] | ||
− | * [[ | + | * [[Виталий Кузькин: Избранные публикации | Selected publications of Vitaly Kuzkin]] |
[[Category: Потенциальные взаимодействия]] | [[Category: Потенциальные взаимодействия]] | ||
[[Category: Механика дискретных сред]] | [[Category: Механика дискретных сред]] |