Advances in Mechanism Design II pp 199-205 | Cite as
Simulation of Isothermal Compression Test
Abstract
Paper deals with an issue of computer simulation of glass pressing. Attention is paid to accuracy of numerical outputs. Simple forming process—isothermal compression of a glass cylinder is chosen for virtual modelling. The constitutive behaviour of shaped glass is assumed to be nonlinear viscoelastic, based on general Maxwell model. Both viscoelastic response and relaxation behaviour of samples made of lead crystal are evaluated. Computer outputs are verified with experimental measurements in the viscosity range of 107–1010 Pa s. In this paper results at temperature 611 °C (corresponding viscosity 107.4 Pa s) and 587 °C (viscosity 108 Pa s) are presented. Uniaxial deformation was carried out at various constant pressing rates (in the interval 0.1–8 mm s−1).
Keywords
Glass melt Isotropic compression method FEM Viscoelastic material modelNotes
Acknowledgments
This publication was written at the Technical University of Liberec as part of the project “Research and development in the field of glass-producing machines, industrial and service robotics” (SGS 21128/115) with the support of the Specific University Research Grant, as provided by the Ministry of Education, Youth and Sports of the Czech Republic in the year 2016.
References
- 1.Vítová, M.: Forming process and rheological properties of glass. In: Proceedings of 12th International Conference on Glass Making Machinery, 2006, p. 173 (in Czech)Google Scholar
- 2.Vítová, M., Matoušek, I.: Rheological response. Ceram. Silikáty 53(1), 59 (2009)Google Scholar
- 3.Bruckner, R., Yue, Y., Habeckm, A.: Load-dependent flow behaviour of silicate glass melts. Glastechnische Berichte 67(5), 114 (1994)Google Scholar
- 4.Sobotka, Z.: Reologie hmot a konstrukcí, Academia (1981) (in Czech)Google Scholar
- 5.MSC Marc 2008. User manualGoogle Scholar