In the paper a complex analysis is made regarding to the use of analytical, numerical and experimental methods for stress evaluation in the industrial structures. These studies were made in order to establish modern calculus methodologies. The comparative studies of different applied methods of such a structure evidenced the superiority of FEM analysis in respect to “exact” or simplified methods and underlined the necessity of their combining

The paper presents two plastic materials from epoxidic resins and compounded polymers families which have properties to visualize stress field produced by mechanical loadings. Using these properties two experimental techniques, photoelasticity and cromoplasticity, were developed for mechanical behaviour investigation of engineering structures. To illustrate the potential of these experimental techniques, in the paper are presented results of a combined

This paper presents some considerations about influences of the milling process on the quality of plastic materials in the process of recycling. There are presented the advantage and disadvantage of the use of the proposed milling system, economic and serial implications. Special part is destined on the technologies processes, granulometric analyze and equipment.

Failure mechanisms for composite materials and especially for laminated composites are different and more complex than for homogeneous and isotropic materials. That is why modeling and analysis of such structures are done having as main goal determination of the local stress states in the zones where high stress gradients occur: supports, points where load are applied, geometric discontinuities, junctions etc. In the case of junctions, one should

In order to test the presence of some chemical substances within the composition of specific liquids and fluids, such as cosmetics, beverages, hydraulic oil, it is absolutely necessary to measure the foam level as a quality condition for selling them on the market. The paper deals with designing an original device for measuring the foam level, which has the following main components: a mechanical subassembly for positioning the sensors, a closed

The use of Rapid Prototyping (RP) processes in manufacturing cellular solids offers the advantages of controlling the distribution, dimensions and interconnection of cells, which influence their micro and macro-structural properties. But not all RP processes are able to build cellular solids with closed cells, this article analyzing the capacity of Fused Deposition Modeling (FDM) process to manufacture this type of structures from ABS material. Using

In the paper, a stress strain analysis in the area of central ligament of a cruciform glass-epoxy specimen is presented. Investigation was done experimentally, using strain gauges technique, by application of six gauges in the stress concentration area. The validation of a theoretical model (a special type of a finite element), which was created by authors for analysis of the laminate composite structures, was the aim of this study. A good agreement

This paper presents two different procedures for the configuration of a glass fibre reinforced laminate in order to enlarge the load capacity of different structures where these materials could be embedded. By some experimental tests, the authors have established the optimal forming pressure of laminate belonging to a glass fibre fabric reinforced composite. A second experimental aspect taken into account was the determination of the optimal number