High-strain-rate tensile mechanical response of a polyurethane elastomeric material

Inelastic deformation of highly aligned dry-spun thermoplastic polyurethane elastomer microfibres

“…It is found that the sample tested with the higher strain rate has higher initial modulus and ultimate tensile strength of 8.15 ± 0.21 MPa and 9.32 ± 0.85 MPa respectively. This finding is similar to a study on a bulk polyurethane by Fan et al in which the transition of rubbery to glassy state occurs as the strain rate increases [62]. Another study by Yi et al shows that polyurethane will mechanically recognise higher glass transition temperature under higher strain rate making it stiffer and stronger [63].…”

Temperature and strain rate dependent large tensile deformation and tensile failure behavior of transparent polyurethane at intermediate strain rates

“…J.T. Fan et al [22] carried out split Hopkinson tension bar (SHTB) tests at high strain rate from 600 /s to 3800 /s on a polyurethane elastomeric material, and then estimated the failure surface of it by scanning electron microscope (SEM). Zhang et al [23] reported quasi-static tensile tests in a hydraulically driven system at 0.1 /s and 0.01 /s and high strain rate SHTB tests from 2200 /s to 6500 /s, combining temperature effect over −40 • C to 50 • C. There are very few works about intermediate strain rate tests.…”

Dynamic Mechanical Behaviour of Polymer Materials

“…Fan et al [34] developed a soft polyurethane elastomeric material for impact-resistant applications. Stress-strain relations, characterized by using a split Hopkinson tension bar, are derived to reveal the mechanical properties at different strain rate levels at room temperature, as shown in Figure 6.…”

“…Figure 6. Representative engineering stress-strain plots of the soft polyurethane elastomeric polymer material under dynamic tension loading with three curves per selected strain rate level [34].…”

“…The relation of tangent modulus versus strain rate curve for determining the critical strain rate of the soft polyurethane elastomeric polymer material for the transition from a rubber-like behaviour at low strain rates to a glasslike behaviour at high strain rates at room temperature [34].…”