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On the thermodynamics of repetitive viscoplastic moulding. (English) Zbl 1031.74009

Summary: In moulding plastic deformation is accompanied by heating. Both phenomena are coupled because the yield limit decreases with temperature, and since a moulded sample resists the tool with a dissipative viscous force. A linear one-dimensional theory of the process is proposed and exploited for the case in which the tool consists of compressive weights. These are applied to a sample at successsive times and relifted to be ready for the next sample. The energy needed for relifting the weights depends on the distribution of weights and on the times of their application.

MSC:

74A15 Thermodynamics in solid mechanics
80A20 Heat and mass transfer, heat flow (MSC2010)
74C10 Small-strain, rate-dependent theories of plasticity (including theories of viscoplasticity)
74F05 Thermal effects in solid mechanics
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