Page 58 - Glass Machinery Plants & Accessories no. 2-2020

SCIENCE AND TECHNOLOGY
Science and technology

Fig. 4 Brinell simulation test

The value dispersion of the
experimental data varies from lot
to lot and even from one sample
to another in the same lot, in wide
limits, expressed in the last column
of Table 2. Averaged values on a
lot are used in this work.
The numerical simulations of
the smooth finishing processes by
plastic deformation on the work-
pieces employ several typical mate-
rial elasto-visco-plastic models.
The viscous-plastic model for
first two material lots used in
simulations, shown in Fig, 3b, is
obtained by combining piecewise
linear plasticity with the Cowper-
Symond multiplier. The viscos-
ity effect, taken in account with

Fig. 5 The work-piece discretiza-
tion, effective plastic strain field
and von Mises stress on active
surface

56 glass machinery plants & accessories 2/2020