Micromechanics-based simulations of compressive and tensile testing on lime-based mortars

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F17%3A00304656" target="_blank" >RIV/68407700:21110/17:00304656 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0167663616305348" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0167663616305348</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.mechmat.2016.11.011" target="_blank" >10.1016/j.mechmat.2016.11.011</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Micromechanics-based simulations of compressive and tensile testing on lime-based mortars

Popis výsledku v původním jazyce

The purpose of this paper is to propose a continuum micromechanics model for the simulation of uniaxial compressive and tensile tests on lime-based mortars, in order to predict their stiffness, compressive and tensile strengths, and tensile fracture energy. In tension, we adopt an incremental strain-controlled form of the Mori–Tanaka scheme with a damageable matrix phase, while a simple J<inf>2</inf> yield criterion is employed in compression. To reproduce the behavior of lime-based mortars correctly, the scheme must take into account shrinkage cracking among aggregates. This phenomenon is introduced into the model via penny-shaped cracks, whose density is estimated on the basis of particle size distribution combined with the results of finite element analyses of a single crack formation between two spherical inclusions. Our predictions show a good agreement with experimental data and explain the advantages of compliant crushed brick fragments, often encountered in ancient mortars, over stiff sand particles. The validated model provides a reliable tool for optimizing the composition of modern lime-based mortars with applications in conservation and restoration of architectural heritage.

Název v anglickém jazyce

Micromechanics-based simulations of compressive and tensile testing on lime-based mortars

Popis výsledku anglicky

The purpose of this paper is to propose a continuum micromechanics model for the simulation of uniaxial compressive and tensile tests on lime-based mortars, in order to predict their stiffness, compressive and tensile strengths, and tensile fracture energy. In tension, we adopt an incremental strain-controlled form of the Mori–Tanaka scheme with a damageable matrix phase, while a simple J<inf>2</inf> yield criterion is employed in compression. To reproduce the behavior of lime-based mortars correctly, the scheme must take into account shrinkage cracking among aggregates. This phenomenon is introduced into the model via penny-shaped cracks, whose density is estimated on the basis of particle size distribution combined with the results of finite element analyses of a single crack formation between two spherical inclusions. Our predictions show a good agreement with experimental data and explain the advantages of compliant crushed brick fragments, often encountered in ancient mortars, over stiff sand particles. The validated model provides a reliable tool for optimizing the composition of modern lime-based mortars with applications in conservation and restoration of architectural heritage.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA13-15175S" target="_blank" >GA13-15175S: Prvky z funkčně vrstvených vláknocementových kompozitů</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Mechanics of Materials

ISSN

0167-6636

e-ISSN

1872-7743

Svazek periodika

105

Číslo periodika v rámci svazku

February

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

12

Strana od-do

49-60

Kód UT WoS článku

000393006300005

EID výsledku v databázi Scopus

2-s2.0-85002125781