The paper presents a comparative analysis between experimental results and modelling in order to interpret the value of the contact pressure on the asymmetric longitudinal rolling. It is also intended action and the different behaviour of upper cylinder compared to the lower cylinder action in situations when both are driven, or only one operates. In the modelling will be presented on the basis of boundary conditions imposed rolling pressure variation in the degree of reduction and also re size arc length of contact. Determining a curve is also important to determine the locus of points which characterize symmetry conditions partial rolling process between unequal diameters cylinders.

The piston is one of the most important components of the internal combustion engine. Piston fail mainly due to mechanical stresses and thermal stresses. In this paper is determined by using the finite element method, stress and displacement distribution due the flue gas pressure and temperature, separately and combined. The FEA is performed by CAD and CAE software. The results are compared with those obtained by the analytical method and conclusions have been drawn.

This paper presents a method which allows the optimization of the position and magnitude of the clamping forces for a specific case of processing: milling of a canal in a prismatic workpiece, using a multi-objective method, implemented with ANSYS software. The design variables are location dimensions of clamping elements, whose range of variation is determined by constructive and dimensional considerations of the workpiece-fixture assembly and the magnitude of the clamping forces. The objective functions of optimization are to minimize the maximum total displacement of the selected edge and to minimize the maximum equivalent stress in workpiece. The constraint is the magnitude of the contact forces between locators and the piece's surfaces to be greater than zero. Values of the design variables which meet the objective functions were obtained after the simulation was performed.

The textile composite materials market has witnessed an important growth in the past decades and is estimated to continue during the forecast period, according all statistics and trends. Since the last decades, the usages of various textiles composite materials in different applications have increased steadily, penetrating and conquering new markets, constantly. While textile composites are already proven to be weight–saving and high strength materials, the current challenge is to make these materials cost–effective by reducing the cost of different types of reinforcements (fibres, yarns or fabrics). The efforts to manufacture economically beneficial composite textiles have resulted in several innovative production techniques, currently being used in the area of the composites industry. Applications vary significantly in size and complexity, loading and surface quality, operating temperature, suitable production volumes and peculiar added value. The expanding choice of raw materials, in terms of the reinforcement type together with the matrix type, followed by many production techniques, gives impressive flexibility in manufacturing of textile reinforced composites. The aim of this work was investigation of the possibilities of reusing of textile wastes, especially the textiles derived from the packaging industry, as reinforcement in production of new added–valued composite materials.

Asymmetric rolling is a technique used to control both the texture and the grain refinement of metallic materials. The aim of asymmetric rolling is to apply a large shear strain uniformly through the thickness of the plate, by maintaining a high degree of friction between the sheet and the rolls. It can be used to improve the formability of material. One of the advantages of asymmetrical rolling is that the rolling force and torque can be decreased. An economic and technological reason, in particular the longitudinally asymmetric rolling is very important to determine the optimum process parameters. The paper presents a method of simulating the asymmetric rolling process. This simulation is carried out to establish the main parameters of rolling particular asymmetric regime. The main goal is to establish a link between the peripheral speed of rolls, pressure and contact length.