Understanding the mechanisms of friction stir welding based on computer simulation using particles

Smolin, Alexey Yu.; Shilko, Evgeny V.; Астафуров, С. В.; Колубаев, Е. А.; Eremina, Galina M.; Psakhie, S. G.

doi:10.1016/j.dt.2018.09.003

Cited by 40 publications

(14 citation statements)

References 24 publications

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“…For simulating the mechanical behavior of the materials for the bone and prosthesis, we use the particle-based method of movable cellular automata (MCA), which was proposed by professors Sergey Psakhie and Yasuyuki Horie in 1994 and firstly published in 1995 [31]. Since that time, the method has been being actively developed in Prof. Psakhie's lab and its latest description can be found, for example, elsewhere in papers [32,33] as well as in book chapters [34,35].…”

Section: Description Of the Modeling Methodsmentioning

confidence: 99%

“…is simulated by the corresponding switching of the pair state. Switching criteria depend on physical mechanisms of material behavior [32,33]. Note, that knowing stress and strain tensor in the bulk of an automaton, makes possible direct application of conventional fracture criteria written in the tensor form, herein we used von Mises criterion based on a threshold value of the equivalent stress.…”

Section: Description Of the Modeling Methodsmentioning

confidence: 99%

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A Tool for Studying the Mechanical Behavior of the Bone–Endoprosthesis System Based on Multi-scale Simulation

Smolin

Eremina

Shilko

2020

Springer Tracts in Mechanical Engineering

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The chapter presents recent advances in developing numerical models for multiscale simulation of the femur–endoprosthesis system for the case of hip resurfacing arthroplasty. The models are based on the movable cellular automaton method, which is a representative of the discrete element approach in solid mechanics and allows correctly simulating mechanical behavior of a variety of elastoplastic materials including fracture and mass mixing. At the lowest scale, the model describes sliding friction between two rough surfaces of TiN coatings, which correspond to different parts of the friction pair of hip resurfacing endoprosthesis. At this scale, such parameters of the contacting surfaces as the thickness, roughness, and mechanical properties are considered explicitly. The next scale of the model corresponds to a resurfacing cap for the femur head rotating in the artificial acetabulum insert. Here, sliding friction is explicitly computed based on the effective coefficient of friction obtained at the previous scale. At the macroscale, the proximal part of the femur with a resurfacing cap is simulated at different loads. The bone is considered as a composite consisting of outer cortical and inner cancellous tissues, which are simulated within two approaches: the first implies their linear elastic behavior, the second considers these tissues as Boit’s poroelastic bodies. The later allows revealing the role of the interstitial biological fluid in the mechanical behavior of the bone. Based on the analysis of the obtained results, the plan for future works is proposed.

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Section: Description Of the Modeling Methodsmentioning

confidence: 99%

Section: Description Of the Modeling Methodsmentioning

confidence: 99%

A Tool for Studying the Mechanical Behavior of the Bone–Endoprosthesis System Based on Multi-scale Simulation

Smolin

Eremina

Shilko

2020

Springer Tracts in Mechanical Engineering

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“…To describe the elastoplastic flow of the material, it was proposed to use the plastic flow theory (namely von Mises model) by adapting the algorithm of Wilkins in the MCA method [21,22]. The radial return algorithm of Wilkins consists of the solution of the elastic problem in increments and the subsequent "drop" of components of stress deviator tensor to von Mises yield surface in the case that equivalent stress exceeds it.…”

Section: Description Of the Simulation Methodsmentioning

confidence: 99%

“…Thus, in the MCA fracture and coupling of fragments (crack healing, microwelding etc) are simulated by the corresponding switching of the pair state. The switching criteria depend on physical mechanisms of material behavior [21,22]. Note that the knowledge of the stress and strain tensor in the bulk of an automaton allows the direct application of conventional fracture criteria written in the tensor form.…”

Section: Description Of the Simulation Methodsmentioning

confidence: 99%

Multilevel Numerical Model of Hip Joint Accounting for Friction in the Hip Resurfacing Endoprosthesis

Eremina

Smolin

2019

FU Mech Eng

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Friction between the moving parts of the endoprosthesis has a significant impact on the endoprosthesis operation time. Primarily, it concerns the endoprosthesis of hip and knee joints. To improve the tribological characteristics of the metal endoprosthesis, hardening nanostructured coatings are used. Usually, titanium and titanium alloys are used as metal, and titanium nitride is used as a coating. Herein, we propose an approach to multilevel modeling of the system “bone-endoprosthesis” which is based on the movable cellular automaton method and accounts for friction between the moving parts of the hip resurfacing endoprosthesis. We validated the models of the friction system materials using the instrumented scratch test simulation. Then, we simulated friction at the mesolevel, explicitly considering roughness of the coating. The results obtained at the mesolevel were used as tribological characteristics of the coating in the macroscopic model of the hip resurfacing endoprosthesis.

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“…Целью данной работы является создание новой численной модели для компьютерного моделирования термомеханического поведения градиентных материалов на основе алюминиевой бронзы, способных к мартенситным фазовым превращениям в условиях трения скольжения. Предложенная модель основана на методе подвижных клеточных автоматов, который является оригинальной реализацией концепции частиц конечного размера и успешно применяется для моделирования механического поведения материалов на металлической и керамической основах в условиях трения на различных масштабах [1][2][3].…”

Section: институт физики прочности и материаловедения со ран томскunclassified

MEZOSKOPIChESKAYa MODEL'' TRENIYa ALYuMINIEVOY BRONZY NA OSNOVE METODA PODVIZhNYKh KLETOChNYKh AVTOMATOV

2020

Mezhdunarodnaya Konferentsiya "Fizicheskaya Mezomekhanika. Materialy S Mnogourovnevoy Ierarkhicheski Organizovannoy Strukturoy

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Understanding the mechanisms of friction stir welding based on computer simulation using particles

Cited by 40 publications

References 24 publications

A Tool for Studying the Mechanical Behavior of the Bone–Endoprosthesis System Based on Multi-scale Simulation

A Tool for Studying the Mechanical Behavior of the Bone–Endoprosthesis System Based on Multi-scale Simulation

Multilevel Numerical Model of Hip Joint Accounting for Friction in the Hip Resurfacing Endoprosthesis

MEZOSKOPIChESKAYa MODEL'' TRENIYa ALYuMINIEVOY BRONZY NA OSNOVE METODA PODVIZhNYKh KLETOChNYKh AVTOMATOV

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