This paper proposes a simple algorithm for solving the contact problems in relation to sheet stamping. The efficiency and reliability of the algorithm are demonstrated by an investigation of the stamping of elastic-plastic circular plates into a conical die with a hemispherical rigid punch. The analysis shows that the contact stress varies greatly with the punch displacement and deviates from t...

In the Deep-drawing process, a blank is drawn into hollow element taking shape of die by operation punch. This process has numerous advantages and applications in automobile, aerospace, kitchenware, packaging industries. The primary purpose this study to design simulate deep drawing LS-Dyna PrePost(R) V4.6.17 using Johnson-Cook flow stress as material model. An appropriate judicious characteriz...

The paper considers the technological process of deep drawing, taking into account high degree deformation metal and small thickness (0.5 mm) workpiece. Given complexity impossibility its representation in an analytical form, uses form a phase portrait plane drawing force movement hydraulic press punch. Phase trajectories mentioned determine geometric dimensions product, characterize stresses d...

The intention of this research is to make analyze of deep drawing Cr-Ni stainless steel process. The research is related to forces that appear in machine tool during the process and also to material stress and its behaviour. The results are taken from two sources and their comparison is made. The first source of results are experiments made on hydraulic press, and the other source are results o...

The goal of this research is to study the anisotropic material behavior during forming processes, represented by both complex yield loci and kinematic-isotropic hardening models. A first part of this paper describes the main concepts of the ‘Stress-strain interpolation’ model that has been implemented in the non-linear finite element code Lagamine. This model consists of a local description of ...

Micromechanical models are developed for the deep penetration of a soft solid by a flat-bottomed and by a sharp-tipped cylindrical punch. The soft solid is taken to represent mammalian skin and silicone rubbers, and is treated as an incompressible, hyperelastic, isotropic solid described by a one-term Ogden strain energy function. Penetration of the soft solid by a flat-bottomed punch is by the...

Lightweight materials have been studied widely at present. Because weight reduction while maintaining functional requirements is one of the major goals in industries in order to save materials, energy and costs, etc. As the lightest structural alloys, magnesium alloys offer great potential to displace the most commonly used materials, because its density is about 2/3 of aluminum and 1/4 of stee...