Experimental and analytical study on uniaxial tensile property of ionomer interlayer at different temperatures and strain rates

摘要

The ionomer material is widely used as interlayers in the laminated glass, and its tensile property plays a decisive role in the post-fracture response of the laminated glass. Since the ionomer material is a kind of polymer, its mechanical behaviour is highly affected by strain rate and temperature. In this work, two series of uniaxial tensile tests, low strain rate series (10 (3) s(-1)similar to 10 (1) s(-1)) and medium to high strain rate series (1 s(-1) similar to 800 s(-1)), were conducted over a wide temperature range (-40 degrees C similar to 80 degrees C). Details of the test setup and corresponding true stress-true strain curves are presented. Characteristic mechanical parameters are then identified to evaluate the temperature and strain rate effects. It was found that higher strain rate and lower temperature result in higher strength and stiffness but lower ductility. The material shows apparent plasticity as more than 80% deformation is unrecoverable. Based on the observations, G'Sell model is adopted to build the temperature-dependent dynamic constitutive model, which is then validated through comparison between the predicted results and the published test data. (C) 2020 Elsevier Ltd. All rights reserved.