A compression creep testing scheme based on TMA equipment was designed in order to obtain viscoelastic properties of glasses. Different with traditional creep tests, in TMA creep testing process, the creep displacement is only a few microns, and the total axial strain could be controlled within a few thousandths. Therefore, the cylinder glass specimen section could be considered as unchanged, the compressive stress can be considered as constant, which will guarantee testing data with a higher precision. Relaxation moduli calculated form creep testing were approximated by generalized Maxwell models, and the viscoelastic datas were verified by finite element analysis.
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