Mitigating mesh dependence in stochastic finite element simulations of quasibrittle fracture

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F21%3APU142666" target="_blank" >RIV/00216305:26110/21:PU142666 - isvavai.cz</a>

Výsledek na webu

<a href="https://congress.cimne.com/complas2021" target="_blank" >https://congress.cimne.com/complas2021</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Mitigating mesh dependence in stochastic finite element simulations of quasibrittle fracture

Popis výsledku v původním jazyce

Modeling quasibrittle materials as strain-softening continua leads to strain localization and the spurious mesh sensitivity of deterministic finite element (FE) simulatioys, an issue which has been addressed with the development of the localization limiters. This study focuses on the case of random material properties and aims to mitigate the mesh dependence of the predicted probabilistic structural response. Considering that each Gauss point of the finite element mesh represents a material element of finite size, the sampling distribution functions of the constitutive properties are related to the failure mechanism of the corresponding element. This consideration implies that the probability distributions of constitutive properties can vary with the element size. The proposed model is applied to FE simulations of a quasibrittle beam under the three-point bending (TPB) test and is shown to be efficient in mitigating mesh dependence of the output strength statistics.

Název v anglickém jazyce

Mitigating mesh dependence in stochastic finite element simulations of quasibrittle fracture

Popis výsledku anglicky

Modeling quasibrittle materials as strain-softening continua leads to strain localization and the spurious mesh sensitivity of deterministic finite element (FE) simulatioys, an issue which has been addressed with the development of the localization limiters. This study focuses on the case of random material properties and aims to mitigate the mesh dependence of the predicted probabilistic structural response. Considering that each Gauss point of the finite element mesh represents a material element of finite size, the sampling distribution functions of the constitutive properties are related to the failure mechanism of the corresponding element. This consideration implies that the probability distributions of constitutive properties can vary with the element size. The proposed model is applied to FE simulations of a quasibrittle beam under the three-point bending (TPB) test and is shown to be efficient in mitigating mesh dependence of the output strength statistics.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

<a href="/cs/project/GA19-12197S" target="_blank" >GA19-12197S: Sdružená Úloha Mechaniky a Proudění v Betonu Řešená Pomocí Meso-Úrovňového Diskrétního Modelu</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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