Опубликована: Янв. 1, 2024

The time-dependent behaviour of polymeric composites is critical in a broad range applications, including those marine, aerospace, and automotive environments. In the present study, we assess validity quasi-linear viscoelastic (QLV) model to fit stress-strain all-polymer syntactic foams under large cyclic compressional strain novel experimental configuration. These were manufactured by adding hollow polymer microspheres various sizes wall thicknesses into polyurethane matrix. materials are known for their relatively initial stiffness, strong recoverability after strains. QLV model, several energy functions (SEFs) employed, neo-Hookean, Ogden type I, II. bulk shear moduli presented form Prony series. By estimating these data using optimisation, natural material properties coefficients associated with SEF determined. influence microsphere filling fraction was also explored. We show that at rate considered here 0.013/sec, compressible coupled Ogden-I capable providing an excellent data. Critically, this can be achieved over cycles via optimisation first response only.

Язык: Английский