Accurate and efficient determination of glass thermo-viscoelastic properties using creep compliance master curve construction approach

• Published in: Journal of non-crystalline solids 2024-05, Vol.631, p.122930, Article 122930
• Main Authors: Zhou, Jian, Xiao, Shihu, Huang, Baocheng, Fang, Dongsheng, Liu, Kun
• Format: Article
• Language: English
• Subjects: Creep compliance; Master curve construction; Stress relaxation; Time-temperature superposition; Viscoelasticity of glass
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2024.122930

•Creep compliance master curve construction approach was proposed for determining thermo-viscoelastic properties of glass.•Optimal shift factors were obtained from a least-error searching algorithm.•The constructed master curve covered a vast timescale up to 2.6×105 seconds.•Relaxation times of modulus function broadly spanned six orders of magnitude.•Interfacial friction's influence on accuracy decreased with the cylindrical specimen's height-to-diameter ratio. An accurate and efficient method for determining the thermo-viscoelastic properties of glass was proposed using a creep compliance master curve construction approach based on the time-temperature superposition principle. This method mainly involved obtaining creep compliance at multiple temperatures, constructing the master curve, and converting into relaxation modulus. By applying this method, the shear relaxation modulus and Williams-Landel-Ferry constants were successfully obtained for K9 glass. A smooth creep compliance master curve at 590 °C was constructed covering a vast timescale up to 2.6×105 seconds, despite a single curve's duration being only 619 seconds. Consequently, the derived relaxation modulus encompassed a broad range of relaxation times spanning six orders of magnitude. The high accuracy of the determined thermo-viscoelastic properties was firmly validated across all tested temperatures. Furthermore, the detrimental impact of friction on the method's accuracy can be effectively minimized by selecting a suitably large height-to-diameter ratio for the cylindrical glass specimen.