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Materiale Plastice
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https://doi.org/10.37358/Mat.Plast.1964

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Materiale Plastice (Mater. Plast.), Year 2016, Volume 53, Issue 2, 280-282



Dragos Alexandru Apostol, Florin Stuparu, Dan Mihai Constantinescu, Liviu Marsavina, Emanoil Linul

Crack Length Influence on Stress Intensity Factors for the Asymmetric Four-point Bending Testing of a Polyurethane Foam


Abstract:
Mixed mode four-point testing is performed on polyurethane foams. This paper presents only the results on the stress intensity factors (SIFs) obtained experimentally for a density of 325 kg/m3, although tests were done for three foam densities. An asymmetric four-point bending setup was used for determining the critical SIFs in Mode I and Mode II, and discussions on the influence of the initial crack length on the SIF values are done. As initial crack length is increased the theoretical predictions give a better comparison to experimentally obtained results.


Keywords:
mixed-mode; polyurethane foams; asymmetric four-point bending; crack length

Issue: 2016 Volume 53, Issue 2
Pages: 280-282
Publication date: 2016/6/30
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