Compressive and shear properties of commercially available polyurethane foams

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

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Bibliographic Details
Published inJournal of biomechanical engineering Vol. 125; no. 5; p. 732
Main Authors Thompson, Mark S, McCarthy, Ian D, Lidgren, Lars, Ryd, Leif
Format Journal Article
LanguageEnglish
Published United States 01.10.2003
Subjects
Biocompatible Materials - chemistry
Biocompatible Materials - classification
Bone Substitutes - chemistry
Compressive Strength
Elasticity
Materials Testing - methods
Polyurethanes - chemistry
Polyurethanes - classification
Shear Strength
Torque
Weight-Bearing
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Summary:The shear properties of rigid polyurethane (PU-R) foams, routinely used to simulate cancellous bone, are not well characterized. 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. 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. PU-R foams may be used to simulate the elastic but not failure properties of cancellous bone.
ISSN:0148-0731
DOI:10.1115/1.1614820