The Deformation of Expanded Clay Syntactic Foams During Compression Characterized by Acoustic Emission

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00524672" target="_blank" >RIV/61389005:_____/20:00524672 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/978-3-030-42798-6_10" target="_blank" >http://dx.doi.org/10.1007/978-3-030-42798-6_10</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-3-030-42798-6_10" target="_blank" >10.1007/978-3-030-42798-6_10</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Deformation of Expanded Clay Syntactic Foams During Compression Characterized by Acoustic Emission

Popis výsledku v původním jazyce

The deformation and failure mechanisms in syntactic foams with different metal matrices were investigated in this study. The syntactic foams were produced by the infiltration method using lightweight expanded clay particles (LECA) as a space holder and commercially pure Al or eutectic Al-12%Si alloy for the matrices. The samples were compressed at room temperature. Simultaneously, the acoustic emission (AE) response and the surface deformation were monitored and collated with the deformation curves. In the case of the Al foam, ductile behavior with long plateau stress was observed. During this plateau regime, multiple active shear bands were detected. In contrast, the AlSi12 foam exhibited more brittle deformation behavior. At the end of the quasi-linear stage, the localization of the strain started within one large shear band, accompanied by a significant stress drop. The AE analysis revealed that the deformation was mostly governed by the fracture of LECA particles and the plastic deformation of the matrix material for both types of foams. After strain localization, in the case of the AlSi12 foam, the fracture of the matrix became significant, causing the deterioration of the sample. In Al foam, due to multiple active shear bands, the stress–strain curve is reproducible even for samples with four times of the size of the LECA particle.

Název v anglickém jazyce

The Deformation of Expanded Clay Syntactic Foams During Compression Characterized by Acoustic Emission

Popis výsledku anglicky

The deformation and failure mechanisms in syntactic foams with different metal matrices were investigated in this study. The syntactic foams were produced by the infiltration method using lightweight expanded clay particles (LECA) as a space holder and commercially pure Al or eutectic Al-12%Si alloy for the matrices. The samples were compressed at room temperature. Simultaneously, the acoustic emission (AE) response and the surface deformation were monitored and collated with the deformation curves. In the case of the Al foam, ductile behavior with long plateau stress was observed. During this plateau regime, multiple active shear bands were detected. In contrast, the AlSi12 foam exhibited more brittle deformation behavior. At the end of the quasi-linear stage, the localization of the strain started within one large shear band, accompanied by a significant stress drop. The AE analysis revealed that the deformation was mostly governed by the fracture of LECA particles and the plastic deformation of the matrix material for both types of foams. After strain localization, in the case of the AlSi12 foam, the fracture of the matrix became significant, causing the deterioration of the sample. In Al foam, due to multiple active shear bands, the stress–strain curve is reproducible even for samples with four times of the size of the LECA particle.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/EF16_013%2F0001794" target="_blank" >EF16_013/0001794: European Spallation Source - účast České republiky - OP</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

The Minerals, Metals & Materials Series

ISBN

978-3-030-42797-9

ISSN

2367-1181

e-ISSN

—

Počet stran výsledku

9

Strana od-do

107-114

Název nakladatele

Springer

Místo vydání

Cham

Místo konání akce

Dearborn

Datum konání akce

20. 8. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—