Influence of service temperature on shear creep behaviour of a rigid low-density closed-cell PIR foam
Source abstract
Abstract
Abstract An experimental campaign was carried out to assess shear creep behaviour of a rigid low-density closed-cell polyisocyanurate (PIR) foam. Two service temperature values were considered, 20 °C and 30 °C, and the applied stresses ranged between 20% and 60% of the corresponding shear strength. The results showed that a stress amplitude of 30% was enough to cause nonlinear creep response. Furthermore, creep deformations were slightly smaller in the tests at 30 °C, a fact that matched the viscoelastic response of the PIR foam obtained from DMA testing. Finally, creep prediction curves were calibrated through an analytical approach based on the Findley’s power law.
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Research context
OpenAlex topics: Asphalt Pavement Performance Evaluation · Polymer composites and self-healing · Natural Fiber Reinforced Composites
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