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The main idea of this paper is to improve our knowledge on localization in a specific case of heterogeneous materials: strips with both aluminium and steel in thickness. A characterization of each material separately has been done by tensile test and also by plane strain tensile test. Afterwards, these two tests are studied on the bimaterial. This study is both experimental with digital image stereo-correlation for strain measurements on both side (aluminium and steel) and numerical with a finite element simulation. A better understanding of the behaviour of a bimaterial can be deducted: aluminium makes mechanical resistance decrease but reinforces the resistance to localization. Some crossing effects have been revealed what induces a fine analyse for each study involving other configurations of bimaterials. [ABSTRACT FROM AUTHOR]

This paper suggests a new method to take into account the kinematic hardening in constitutive behaviour of metallic face centred cubic single crystal. The keystone of this model is that kinematic effect arises from a description of the crystal dislocation microstructure based on a heterogeneous distribution of slip strength. In this paper, these concepts are applied to crystalline plasticity models. In particular, simulations of monotonous tensile test and cyclic loading are analysed to show that implementation of the proposed concepts, without any additional complexity, gives the current model a wide range of applications from small cycled strains to large monotonous ones. [ABSTRACT FROM AUTHOR]

This article concerns the forming of a steel thin-wall short-tube by an innovative small surface contact deformation process. A Finite Element model was built to predict the forming of the workpiece. The model controls the complex kinematics of the process. The problems associated with contact control and computation time are also investigated. Compared with measurements taken by the industrial partner, the first results obtained are highly promising, with regard to predicting both the workpiece geometry and the forces acting on the tools. [ABSTRACT FROM AUTHOR]