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Comparative Study
. 2003 Oct;125(5):732-4.
doi: 10.1115/1.1614820.

Compressive and shear properties of commercially available polyurethane foams

Mark S Thompson  1 , Ian D McCarthy, Lars Lidgren, Leif Ryd
Affiliations
Comparative Study

Compressive and shear properties of commercially available polyurethane foams

Mark S Thompson et al. J Biomech Eng. 2003 Oct.

Abstract

Background: The shear properties of rigid polyurethane (PU-R) foams, routinely used to simulate cancellous bone, are not well characterized.

Method of approach: The present assessment of the shear and compressive properties of four grades of Sawbones "Rigid cellular" PU-R foam tested 20 mm gauge diameter dumb-bell specimens in torsion and under axial loading.

Results: Shear moduli ranged from 13.3 to 99.7 MPa, shear strengths from 0.7 MPa to 4.2 MPa. Compressive yield strains varied little with density while shear yield strains had peak values with "200 kgm-3" grade.

Conclusions: PU-R foams may be used to simulate the elastic but not failure properties of cancellous bone.

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