Publication result detail

Mitigating mesh dependence in stochastic finite element simulations of quasibrittle fracture

GORGOGIANNI, A.; ELIÁŠ, J.; LE, J.

Original Title

Mitigating mesh dependence in stochastic finite element simulations of quasibrittle fracture

English Title

Mitigating mesh dependence in stochastic finite element simulations of quasibrittle fracture

Type

Paper in proceedings outside WoS and Scopus

Original Abstract

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.

English abstract

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.

Keywords

-

Key words in English

-

Authors

GORGOGIANNI, A.; ELIÁŠ, J.; LE, J.

RIV year

2023

Released

02.05.2021

Pages from

1

Pages to

4

Pages count

4

URL

https://congress.cimne.com/complas2021

BibTex

@inproceedings{BUT175489,
  author="Anna {Gorgogianni} and Jan {Eliáš} and Jia-Liang {Le}",
  title="Mitigating mesh dependence in stochastic finite element simulations of quasibrittle fracture",
  year="2021",
  pages="1--4",
  url="https://congress.cimne.com/complas2021"
}