Abstract
Simulation by plasticine is carried out to estimate the stress distribution and deformation o f steel in hot rolling and to prevent the generation of internal or surface crack of slab in continuous casting.
In this report, first of all, the following dynamic properties of plasticine is treated to establish the foundation of simulation:
i) Static properties (the stress-strain relation, its dependence on temperature and a criterion of yielding, etc.)
ii) Kinetic properties (the dependence of stress on the strain-rate etc.)
iii) Friction with metal surface.
From the above investigation, it became clear that, there exists the following relation between the stress σ(kgf/cm2), logarithmic strain ε, strain-rate ε(1/s) and temperature T(°K), in the region of T=253°-323°K, ε=0.02-0.3 and ε=10-2-100l/s; σ=1.15×10-5ε0.085ε0.12 exp(3530/T)
Then the above result is compared with the deformation resistance of steel at high temperatures (about 1000°C). And it is confirmed that plasticine has well satisfied properties to simulate not only the deformation of steel at high temperatures but also the stress distribution.
