Time - temperature and time - strain superposition in polycarbonate below T_g

As the models needed to adequately describe the complex material response to several industrial processes get increasingly sophisticated, there is a corresponding need for reliable material data to successfully implement them. In response to this need, ongoing work is aimed at developing an efficient methodology that reduces both the experimental time and complexity required to obtain accurate material parameters. This work examines the sub glass transition time - temperature and time - strain superposition behaviors of polycarbonate in stress relaxation under torsion. These are two techniques that are commonly used to estimate the long term material performance from relatively short-term tests.