1230 ガラスレンズのプレス成形に関する有限要素シミュレーション

概要

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In the present paper, numerical simulation of forming process of glass lens using finite element method is demonstrated. Generally, material properties of glass, e.g. viscoelastic constants and coefficient of thermal expansion, depend on time-history and temperature. In the present study, creep test has been conducted to determine the thermo-viscoelastic constants of glass. The creep function obtained by experiment has been transformed into relaxation function using Laplace transform and its inversion. Shift factor which gives the relation between the time and temperature can be determined by creep test, too. Some numerical simulation by FEM are executed to obtain the residual stress and residual deformation under several thermal conditions changing the cooling time, and the optimal condition for forming of glass lens is discussed.
社団法人日本機械学会の論文
2003-09-23