Three Dimensional Thermoviscoplastic Deformation Behavior of Blocks Under Uniaxial Tension

A rigid-plastic finite element method which employ stabilization matrices and enables effective and accurate computation was applied to investigation of the effects of strain rate and temperature sensitivities, deformation rate, thermal conductivity, and size on three-dimensional deformation behaviors in blocks subjected to tension. The results clarified that the increase of the deformation rate caused thermal softening and that the displacement at the maximum load point decreased. Futhermore, the load decreased significantly. The size effect should always be taken into account for accurate prediction of the problem, including the heat generation and transfer. Under a relatively low deformation rate, the adiabatic assumption may not provide suitable information on the thermovisco-plastic deformation behaviors. It is also shown that the present results indicate more relaxed deformation than that due to the plane strain approximation.