The notch effect on fracture of polyurethane materials
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...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Gruppo Italiano Frattura
2014-10-01
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| Series: | Fracture and Structural Integrity |
| Subjects: | |
| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero30/numero_30_art_14.pdf |
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| Summary: | 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 |
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| ISSN: | 1971-8993 1971-8993 |