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Characterization of Geometrical Changes of Spherical Advanced Pore Morphology (APM) Foam Elements during Compressive Deformation

Authors :
Zoran Ren
Matej Vesenjak
Ken Shimojima
Matej Borovinšek
Yoshikazu Higa
Source :
Materials, Volume 12, Issue 7, Materials, Vol 12, Iss 7, p 1088 (2019)
Publication Year :
2019
Publisher :
MDPI, 2019.

Abstract

The mechanical properties of Advanced Pore Morphology (APM) foam elements depend strongly upon their internal porous and external structural geometry. This paper reports on a detailed investigation of external (e.g. shape and size) and internal (e.g. distribution, size, number of pores) geometry and porosity changes of APM foam elements, during compressive loading by means of the ex-situ micro-Computed Tomography, and advanced digital image analysis and recognition. The results show that the porosity of APM foam elements decreases by only 25% at the engineering strain of 70% due to an increase of the number of pores at high stages of compressive deformation. The APM foam elements also exhibit a positive macroscopic Poisson&rsquo<br />s ratio of &upsilon<br />= 0.2, which is uncharacteristic for cellular structures.

Details

Language :
English
ISSN :
19961944
Volume :
12
Issue :
7
Database :
OpenAIRE
Journal :
Materials
Accession number :
edsair.doi.dedup.....6e6eabb55487c30b8d58984d497a8a5c