The notch effect on fracture of polyurethane materials

The notch effect on fracture of polyurethane materials

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This paper investigates the fracture properties and notch effect of PUR materials with four different densities. The asymmetric semi-circular bend specimen was adapted to perform mixed mode fracture toughness tests. This semi-circular specimen with radius R, which contains an edge crack of length a...

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Main Authors: T. Voiconi, R. Negru, E. Linul, L. Marsavina, H. Filipescu
Format: Article
Language:English
Published: Gruppo Italiano Frattura 2014-09-01
Series:Frattura ed Integrità Strutturale
Subjects:
Polyurethane materials
Online Access:https://www.fracturae.com/index.php/fis/article/view/1293
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spelling doaj-34c2d149db42417992c586f32b3aee552021-01-27T17:17:30ZengGruppo Italiano FratturaFrattura ed Integrità Strutturale1971-89932014-09-01830The notch effect on fracture of polyurethane materialsT. VoiconiR. NegruE. LinulL. MarsavinaH. Filipescu This paper investigates the fracture properties and notch effect of PUR materials with four different densities. The asymmetric semi-circular bend specimen was adapted to perform mixed mode fracture toughness tests. This semi-circular specimen with radius R, which contains an edge crack of length a oriented normal to the specimen edge, loaded with a three point bending fixture, was proved to give wide range of mixed modes from pure mode I to pure mode II, only by changing the position of one support. Different types of notched specimens were considered for notch effect investigations and the Theory of Critical Distances was applied. It could be seen that the critical distances are influenced by the cellular structure of investigated materials. https://www.fracturae.com/index.php/fis/article/view/1293Polyurethane materials
collection DOAJ
language English
format Article
sources DOAJ
author T. Voiconi
R. Negru
E. Linul
L. Marsavina
H. Filipescu
spellingShingle T. Voiconi
R. Negru
E. Linul
L. Marsavina
H. Filipescu
The notch effect on fracture of polyurethane materials
Frattura ed Integrità Strutturale
Polyurethane materials
author_facet T. Voiconi
R. Negru
E. Linul
L. Marsavina
H. Filipescu
author_sort T. Voiconi
title The notch effect on fracture of polyurethane materials
title_short The notch effect on fracture of polyurethane materials
title_full The notch effect on fracture of polyurethane materials
title_fullStr The notch effect on fracture of polyurethane materials
title_full_unstemmed The notch effect on fracture of polyurethane materials
title_sort notch effect on fracture of polyurethane materials
publisher Gruppo Italiano Frattura
series Frattura ed Integrità Strutturale
issn 1971-8993
publishDate 2014-09-01
description This paper investigates the fracture properties and notch effect of PUR materials with four different densities. The asymmetric semi-circular bend specimen was adapted to perform mixed mode fracture toughness tests. This semi-circular specimen with radius R, which contains an edge crack of length a oriented normal to the specimen edge, loaded with a three point bending fixture, was proved to give wide range of mixed modes from pure mode I to pure mode II, only by changing the position of one support. Different types of notched specimens were considered for notch effect investigations and the Theory of Critical Distances was applied. It could be seen that the critical distances are influenced by the cellular structure of investigated materials.
topic Polyurethane materials
url https://www.fracturae.com/index.php/fis/article/view/1293
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