Journal of Materials Science and Engineering with Advanced TechnologyAuthor's: C. Mougel, T. Garnier, N. Sintes-Zydowicz and P. Cassagnau
Pages: [43] - [78]
Received Date: April 28, 2019
Submitted by:
DOI: http://dx.doi.org/10.18642/jmseat_7100122053
This paper presents the effect of the phenolic foam density, in the
range from 0.14 to 
on the compression and flexural behaviours as
well as on friability properties. The bulk and Young's modulus were
determined from crushing and flexural tests respectively and compared
to the Gibson and Ashby model. It is then observed that these
experimental results are consistent with the model. Surprisingly, the
plateau stress calculated from crushing tests does not follow the
model of brittle foams defined by Gibson and Ashby but that of elastic
foams. The maximum strain at break also contradicts the model but the
relation found in this work satisfies a more physically meaningful
model, as this one indicates that the dense state has almost the same
density as the densified foam. Furthermore, the results of the
friability tests on phenolic foam were found to be highly dependent on
density. In addition, the evolution of the microstructure versus
density was also characterized by SEM and then processed with image
analysis software. It was found that with increasing density, the
average cell size decreases, cell size distribution narrows, and the
cell density remains stable.
phenolic foams, density, mechanical properties, morphology, friability.
