Open AccessMechanical properties of a structural polyurethane foam and the effect of particulate loading
Author(s) -
S.H. Goods,
C.L. Neuschwanger,
L.L. Whinnery
Publication year - 1998
Language(s) - English
Resource type - Reports
DOI - 10.2172/650182
Subject(s) - polyurethane , materials science , composite material , power law , filler (materials) , metal foam , modulus , elastic modulus , particulates , relative density , aluminium , microstructure , chemistry , statistics , mathematics , organic chemistry
The room temperature mechanical properties of a closed-cell, polyurethane encapsulant foam have been measured as a function of foam density. Tests were performed on both unfilled and filler reinforced specimens. Over the range of densities examined, the modulus of the unloaded foam could be described by a power-law relationship with respect to density. This power-law relationship could be explained in terms of the elastic compliance of the cellular structure of the foam using a simple geometric model found in the literature. The collapse stress of the foam was also found to exhibit a power-law relationship with respect to density. Additions of an aluminum powder filler increased the modulus relative to the unfilled foam