The mechanical behaviour of poly(vinyl butyral) at different strain magnitudes and strain rates

• Published in: Journal of materials science Vol. 47; no. 8; pp. 3564 - 3576
• Main Authors: Hooper, P. A., Blackman, B. R. K., Dear, J. P.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.04.2012; Springer; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Constitutive models; Constitutive relationships; Crystallography and Scattering Methods; Dynamic mechanical analysis; Dynamic tests; High speed; Hydraulic tests; Materials Science; Mathematical models; Mechanical analysis; Mechanical properties; Polymer Sciences; Polyvinyl butyral; Solid Mechanics; Strain; Strain analysis; Strain rate; Time dependence; Shift Factor; Dynamic Mechanical Analysis; High Strain Rate; Styrene Butadiene Rubber; Laminate Glass
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-011-6202-4

The mechanical behaviour of poly(vinyl butyral) (PVB) at small (<0.1%) and large strains (>200%) is investigated experimentally over a range of strain rates to provide data for the development and validation of constitutive models. The small-strain response is investigated using dynamic mechanical analysis at frequencies from 1 to 100 Hz and temperatures from −80 to 70 °C. It is found that a generalised Maxwell model adequately describes the material behaviour in the small-strain regime. The large-strain response is investigated using a high-speed servo hydraulic test machine at strain rates from 0.2 to 400 s −1 . It is found that the PVB response is characterised by a time-dependent steep initial rise in stress followed by a hyperelastic type response until failure. No current material model completely captures this time-dependent behaviour at large strains.