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Medientyp:
E-Artikel
Titel:
Study of Reticulated Vitreous Carbon Foam as a Quasi-Brittle Material
Beteiligte:
Heard, P.J.;
Flewitt, Peter E.J.
Erschienen:
Trans Tech Publications, Ltd., 2015
Erschienen in:Key Engineering Materials
Sprache:
Nicht zu entscheiden
DOI:
10.4028/www.scientific.net/kem.665.229
ISSN:
1662-9795
Entstehung:
Anmerkungen:
Beschreibung:
<jats:p>Quasi-brittle materials are those where the addition of specific microstructural features such as porosity can lead to departure from linear elastic behaviour prior to maximum force, followed by graceful failure. A simple example of a quasi-brittle material is reticulated vitreous carbon foam; an open-cell structure consisting of brittle ligaments connected in a three-dimensional array. Tensile testing measurements have been made on foams with various pore and ligament dimensions; force - displacement combined with acoustic monitoring together with the evaluation of the associated elastic moduli and fracture strengths. These tests give insights into the mechanisms of quasi-brittle failure, and the results are explored using simple considerations of elastic energy storage throughout process zones.</jats:p>