Lars Olovsson

An ALE formulation for the solution of two-dimensional metal cutting problems

Abstract This work concerns the development of numerical methods for efficient and reliable computer simulations of cutting operations. A finite element (FE) code, based on an arbitrary Lagrangian–Eulerian (ALE) formulation has been developed. The ALE formulation allows a natural treatment of the cracking of work material. In addition, large strains do not cause problematic element distortions and by using flow boundary conditions only a small part of the workpiece in the vicinity of the tool tip needs to be modeled. A few test simulations show promising results and the ALE formulation seems numerically robust.

Numerical model for the oil pressure distribution in the hydromechanical deep drawing process

Abstract This paper presents an attempt to simulate the hydromechanical deep drawing process using the finite element method (FEM). The basic idea is to compute the counter pressure and the fluid film pressure by solving a finite difference approximation of Reynold’s equation. The concept is implemented as a contact algorithm in Exhale2D, an explicit finite element code for two-dimensional analyses. The numerical results illustrate a rather good agreement with experimental data.

Aspects of Finite Element Simulation of Axi-Symmetric Hydromechanical Deep Drawing

A new approach for the Finite Element modelling of the hydromechanical deep drawing process is evaluated. In the model a Finite Difference approximation of Reynolds equation is solved for the flui ...

A framework for multiplicative associative isotropic elasto-plasticity, that preserves the structure of the infinitesimal theory

A framework for multiplicative associative isotropic elasto-plasticity that preserves the structure of the infinitesimal theory is presented. Underpinning the work is a kinematical treatment of multiplicative plasticity based on two generic times. To exemplify, the case of one scalar hardening variable is considered in detail. The so obtained relations may be recast in a form identical to relations found in the literature.