Viscoelastic characterization of seven laminated glass interlayer materials from static tests

The mechanical behaviour of laminated glass is strongly affected by the polymeric interlayer placed between layers. In general, this a viscoelastic material, and therefore it may experience creep stress relaxation when subjected for an extended period to constant or strain respectively. study, seven different commercial materials (EVALAM, EVASAFE, PVB BG-R20, Saflex DG-41, ES, SentryGlas, TPU) were evaluated with tests at temperatures, in order build master curves through time-temperature superposition principle. A generalized Maxwell model was chosen describe tested materials. This paper includes coefficients Prony series that fit better experimental results. has two main goals. First, present (ei ?i), which can then be used create numerical models take into consideration time temperature-dependant interlayer. Second, provide components complex modulus (E*(?)) each storage (E’(?)) loss (E’’(?)), obtained from (E(t)) using analytical interconversions.