The self-consistent Eulerian rate-type elastoplastic model based on the logarithmic rate is used to study finite bending of a compressible elastic-perfectly plastic rectangular block. It is found that an explicit closed-form solution for this typical inhomogeneous finite deformation mode may be available in a general case of compressible deformation with a stretch normal to the bending plane, w...

A common understanding of plastic deformation of metallic glasses (MGs) at room temperature is that such deformation occurs via the formation of runaway shear bands that usually lead to catastrophic failure of MGs. Here we demonstrate that inhomogeneous plastic flow at nanoscale can evolve in a well-controlled manner without further developing of shear bands. It is suggested that the sample und...

A dual phase Ti-6A1-4V alloy was tested in uniaxial tension over a large quasi-static loading range (10−5–10−1 s−1) in ambient environment. As strain rate increases, strength of the alloy was found to increase at the expense of ductility. In the low strain-rate region, strain rate sensitivity of the material experienced a gradual decrease during plastic deformation. In the high strain-rate regi...

Nano scale grain size reduction (UFG) is one of three suitable methods for improving the mechanical properties 6000 series aluminum alloys, by structural precipitation, strain hardening or cold work hardening. For working, several techniques are now available such as (ECAP - PC), (CEEA), (THP), (MM), (ARB), (CW). Cold compression high pressing (CW-CHP) can be applied in cycles depending on beha...

This paper provides an introduction in the field of severe plastic deformation (SPD). First of all the main methods to produce SPD materials are discussed. In the following section, the mechanisms leading to the formation of fine grains are reviewed and the influence of changes in strain path is highlighted. During post-SPD thermal annealing, some typical microstructural changes take place. The...

The localization of plastic deformation into a shear band is discussed as an instability of -plastic flow and a precursor to rupture. Experimental observations are reviewed, a ge~eral theoretical framework is presented, and specific calculations of critical conditions are carried out for a variety of material models. The interplay between features of inelastic constitutive description~ especial...

Numerical modeling of microstructure evolution in various regions during uniaxial compression and canning compression of NiTi shape memory alloy (SMA) are studied through combined macroscopic and microscopic finite element simulation in order to investigate plastic deformation of NiTi SMA at 400 °C. In this approach, the macroscale material behavior is modeled with a relatively coarse finite el...

Large thermal stresses easily exceeding the tissue yield strength may develop in the frozen region around a cryosurgical probe. A new integrodifferential solution for the heat transfer problem of biological tissues freezing around a cryosurgical probe is presented in this article. This solution is suitable for cases of high Stephan numbers and for a temperature-dependent forcing function at the...

Original scientific paper In this paper, based on the overlapping deformation mode of load transfer law of uplift belled pile, and the theory of elastic mechanics, the elastic-plastic analytical solutions of uplift belled pile were derived, and the nonlinear elastic-plastic deformation analysis method was established, which made the deformation analysis theory of uplift belled pile more reasona...