A probabilistic crack band model for quasibrittle fracture

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F16%3APU122692" target="_blank" >RIV/00216305:26110/16:PU122692 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1115/1.4032692" target="_blank" >http://dx.doi.org/10.1115/1.4032692</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1115/1.4032692" target="_blank" >10.1115/1.4032692</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A probabilistic crack band model for quasibrittle fracture

Popis výsledku v původním jazyce

This paper presents a new crack band model (CBM) for probabilistic analysis of quasi-brittle fracture. The model is anchored by a probabilistic treatment of damage initiation, localization, and propagation. This model regularizes the energy dissipation of a single material element for the transition between damage initiation and localization. Meanwhile, the model also takes into account the probabilistic onset of damage localization inside the finite element (FE) for the case where the element size is larger than the crack band width. The random location of the localization band is related to the random material strength, whose statistics is described by a finite weakest link model. The present model is applied to simulate the probability distributions of the nominal strength of different quasibrittle structures. It is shown that for quasibrittle structures direct application of the conventional CBM for stochastic FE simulations would lead to mesh-sensitive results. To mitigate such mesh dependence, it is essential to incorporate the strain localization mechanism into the formulation of the sampling distribution functions of material constitutive parameters.

Název v anglickém jazyce

A probabilistic crack band model for quasibrittle fracture

Popis výsledku anglicky

This paper presents a new crack band model (CBM) for probabilistic analysis of quasi-brittle fracture. The model is anchored by a probabilistic treatment of damage initiation, localization, and propagation. This model regularizes the energy dissipation of a single material element for the transition between damage initiation and localization. Meanwhile, the model also takes into account the probabilistic onset of damage localization inside the finite element (FE) for the case where the element size is larger than the crack band width. The random location of the localization band is related to the random material strength, whose statistics is described by a finite weakest link model. The present model is applied to simulate the probability distributions of the nominal strength of different quasibrittle structures. It is shown that for quasibrittle structures direct application of the conventional CBM for stochastic FE simulations would lead to mesh-sensitive results. To mitigate such mesh dependence, it is essential to incorporate the strain localization mechanism into the formulation of the sampling distribution functions of material constitutive parameters.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

<a href="/cs/project/GJ15-19865Y" target="_blank" >GJ15-19865Y: Diskrétní modely lomového porušení: adaptivní zjemňování diskretizace, hnací síla trhliny a napětí na hranici</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

JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME

ISSN

0021-8936

e-ISSN

1528-9036

Svazek periodika

83

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

1-7

Kód UT WoS článku

000374149400005

EID výsledku v databázi Scopus

2-s2.0-84959449514