Mitigating mesh dependence in stochastic finite element simulations of quasibrittle fracture

Result code in 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>

Result on the web

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

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Mitigating mesh dependence in stochastic finite element simulations of quasibrittle fracture

Original language description

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.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20102 - Construction engineering, Municipal and structural engineering

Project

<a href="/en/project/GA19-12197S" target="_blank" >GA19-12197S: Coupled Discrete Meso-scale Model for Mechanics and Transport Phenomena in Concrete</a><br>

Continuities

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

Publication year

2021

Confidentiality

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