Ştefania Olăreanu, Bogdan Andrei, Valentin-Vasile Ungureanu
EXPERIMENTAL DETERMINATION OF OPTIMAL DOSAGE ACTIVATOR FOR POZZOLANIC BINDER FORMULATION

The use of mixes stabilized with pozzolanas has been internationally established since 1987, during the International Roads Congress held in Brussels, and it is ascertained that pavements with stabilized layers were already widespread in the entire world.
In Romania, although the thematic scientific preoccupations have been synchronic to the international ones and have been finalized with the elaboration of instructions and norms to be applied, there has been no resort to current application, due to bureaucracy inertia as well as to professional biases of road constructors, stimulated by some inadvertences of the normative stipulations and by the severity of the imposed technical condition for this technology.

Luiz Fernando Lunkes, Elimar Joaquim Duarte, Fulvio Enrico Giacomo Chimisso
PROJECT AND CONSTRUCTION OF A PAIR OF CLAMPS TO PERFORM TESTS ON SYNTHETIC FIBER ROPES

To guarantee the total reliability of an anchorage system of a petroleum platform, it is essential to test intensely the ropes used on this application, ensuring a perfect idea about their properties. However, testing synthetic fiber ropes is not an easy task. To do that, it is important that these tests could be applicable for most different architecture, size or material as possible, reproducing the real studied rope characteristics.
POLICAB (Stress Analysis Laboratory) has been studying this subject for a long time, trying to create a device that could perform reliable tests. Therefore, the present paper will talk about the last one developed in the laboratory, the Sandwich Clamps for 10 ton load tests performance.

Ákos Lengyel, Bálint Katona, Péter Nagy, Eszter Bognár, Kristóf Hirschberg, János Dobránszky
PROCESS TO INSERT NITINOL STENTS INTO THE PERIPHERAL VENOUS CATHETER

In the European Union the most often reason of deaths is the disease of the cardiovascular system. The so called stent is a biocompatible metal mesh which is inserted in the narrowed section of the artery to dilate and prop up its wall; hereby it ensures continuous flow of blood, inhibiting for example the formation of stroke. In pursuance of our research stents made of shape memory Ni-Ti alloy (nitinol) were investigated which can be exceedingly applied in peripheral arteries exploiting the special features of nitinol.

Daniel Kytýř, Tomáš Doktor, Jaroslav Valach, Ondřej Jiroušek, Petr Zlámal, Michaela Kostelecká
EVALUATION OF SAMPLE PREPARATION PROCEDURES FOR MICRO-MECHANICAL TESTING OF TRABECULAR BONE

To improve the knowledge about the mechanical properties of trabecular bone it is necessary to assess the properties at micrometer scale. Testing of isolated human trabeculae is highly influenced by precision of the sample preparation. Article deals with description of the pre-testing procedure for the uniaxial testing, nanoindentation and finite element modelling of single trabeculae. Undesirable mechanical, biological and chemical influences have to be excluded during this procedure.

Jens Kretzschmar, Martin Stockmann, Alexey Shutov
DETERMINATION OF PRESSURE DISTRIBUTIONS USING A GRADIENT BASED OPTIMIZATION METHOD AND APPLICATION AT FORMING TOOLS FOR HIGH GEARS

Gradient based optimization algorithms have found applications in many fields of science. In Mechanical Engineering it is common to identify unknown parameters of material models or to optimize the shape of structures. In this paper another application will be presented. Our research deals with the identification of the loads applied to a round rolling tool at a forming process basing on measured strains.