How to Handle Irregular Distribution of SPH Particles in Dynamic Fracture Analysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F16%3APU120589" target="_blank" >RIV/00216305:26110/16:PU120589 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.iaras.org/iaras/journals/caijtam/how-to-handle-irregular-distribution-of-sph-particles-in-dynamic-fracture-analysis" target="_blank" >http://www.iaras.org/iaras/journals/caijtam/how-to-handle-irregular-distribution-of-sph-particles-in-dynamic-fracture-analysis</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

How to Handle Irregular Distribution of SPH Particles in Dynamic Fracture Analysis

Popis výsledku v původním jazyce

The failure of quasi-brittle materials is still a topical issue today, as no comprehensive theory that is able to describe all the ways in which stress can occur without the introduction of special variables has yet been accepted. The numerical methods which are commonly used for the investigation of extensive problems that include fracture mechanics often need various extensions so that they are able to solve a given task successfully. The Smoothed Particle Hydrodynamics (SPH) method was not used in connection with quasi-brittle material failure for a long time due to the fact that it was not conceptually designed for the investigation of structural mechanics issues, but rather for hydrodynamics. However, in cases of high-speed stress, it is advantageous to use the SPH method because materials with structural strength behave in a similar way to fluids in such situations. Unfortunately, even this method suffers from false numerical dependencies which can influence the results of simulations in a negative manner. It can be concluded from executed tests that the initial regularity of the distribution of SPH particles plays an important role regardless of the investigated task. The contribution describes a test from the area of the simulation of dynamically loaded concrete structures using the SPH method. The primary subject of discussion is the influence of the initial distribution of particles on the results of simulations, as well as a possible solution to problems which arise due to the poor regularity of particle distribution. The simulations in question are compared with the experiment and results obtained via the Finite Element Method.

Název v anglickém jazyce

How to Handle Irregular Distribution of SPH Particles in Dynamic Fracture Analysis

Popis výsledku anglicky

The failure of quasi-brittle materials is still a topical issue today, as no comprehensive theory that is able to describe all the ways in which stress can occur without the introduction of special variables has yet been accepted. The numerical methods which are commonly used for the investigation of extensive problems that include fracture mechanics often need various extensions so that they are able to solve a given task successfully. The Smoothed Particle Hydrodynamics (SPH) method was not used in connection with quasi-brittle material failure for a long time due to the fact that it was not conceptually designed for the investigation of structural mechanics issues, but rather for hydrodynamics. However, in cases of high-speed stress, it is advantageous to use the SPH method because materials with structural strength behave in a similar way to fluids in such situations. Unfortunately, even this method suffers from false numerical dependencies which can influence the results of simulations in a negative manner. It can be concluded from executed tests that the initial regularity of the distribution of SPH particles plays an important role regardless of the investigated task. The contribution describes a test from the area of the simulation of dynamically loaded concrete structures using the SPH method. The primary subject of discussion is the influence of the initial distribution of particles on the results of simulations, as well as a possible solution to problems which arise due to the poor regularity of particle distribution. The simulations in question are compared with the experiment and results obtained via the Finite Element Method.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JM - Inženýrské stavitelství

OECD FORD obor

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Projekt

<a href="/cs/project/GA14-25320S" target="_blank" >GA14-25320S: Aspekty použití komplexních nelineárních materiálových modelů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

International Journal of Theoretical and Applied Mechanics

ISSN

2367-8984

e-ISSN

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Svazek periodika

2016

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

BG - Bulharská republika

Počet stran výsledku

6

Strana od-do

212-217

Kód UT WoS článku

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EID výsledku v databázi Scopus

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