For this research, torsion tests and three-point bending tests were executed on glass/ionomer laminates under controlled temperature (5 C to 65 C) and relative humidity (50%) conditions. This article presents some preliminary test results. The torsion tests showed for instance that the torsion stiffness changes most around the glass transition temperature. At higher temperatures, a less changing, lower torsional stiffness is noticed much faster. However, the bending tests at 65 C showed that the bending stiffness still decreased after a loading duration of more than five days
