Articolele autorului Ileana Nicoleta POPESCU
Link la profilul stiintific al lui Ileana Nicoleta POPESCU

Studies and researches recording fabrication of some aluminum base composites used in transport industry
Poly(bisphenol A) cyanurate network modified with poly(butylene glycol adipate).
Critical aspects regarding the elemental composition conformity assessment of some sorts of AISI 316 steel according ISO 5832-1 standard
Experimental research and modelling of compaction behaviour of Al based composite with SiC particles

The aim of the present paper were to determine compressibility behavior of post-compacts depending on compaction pressure and the silicon carbide content in the Al-Cu matrix powder mixtures. Determination of Al- 4wt.% Cu with 5-20 wt.% SiC powder mixtures' compressibility was performed in a double action hardened steel die at pressures between 50-450 MPa. For understanding of compaction behavior of Aluminum based composites reinforced with silicon

Read more
Some existence and selection results on a residual plastic deformation of AL based Composites

The hardening state through mechanical deformation emphasized in internal structure of materials, in according with the processes of elastic-plastic deformation enables us for particular behavior laws, introducing of a dual frame needed by the treatment of quasi-static equilibrium equations. Introduction of a Hilbert space for admissible deformations of a mechanical system, following a hardening process of a cold deformed composite, a process governed

Read more
New Conceptions about Refractory Monolithic Materials

The present work is intended as a synthesis of fundamentals regarding the achievements of successive generation of refractory concretes. In order to reach this goal both the results of our own researches and information from literature have been used. A unitary concept is developed on binding system belonging to this category, on mechanisms and processes that take place during hardening and on the behavior of these systems during service.

Read more
Relative humidity monitoring

In this paper, the relative humidity is monitored with weather station at the UPB ISB faculty during September-December 2009. In this paper we monitored the relative humidity, we plotted the values obtained and then we made a statistical analyzing of obtained date. After analyzing the data we notices that: the lowest humidity in September was recorded on September 04, 05 September 2009 at 17:00 worth 28 % and the highest value on September 6, 7 2009

Read more
Analysis of Relative Humidity Variation in Autumn 2009

In the present paper, relative humidity variation was analyzed every week from autumn months of 2009, and analysis was done for the 1st day of September and the last day of December 2009. Relative humidity variation analysis was made based on the records of the atmospheric parameters of the weather station equipment from Biotechnical Engineering Faculty of the University "Politehnica" of Bucharest (UPB). Based on records maintained by AWS weather

Read more
Experimental researches and statistical analysis of the corrosion behavior of rolled and heat treated 2xxx Al alloys

The material for experiments was an aluminum alloys series 2xxx obtained by thermo-mechanical processing using different parameters of artificial aging. The slab of Al alloys was rolled at 450-400o C for 7-8 hours. solution treated at 500 +/- 5o C. maintaining time 40 minutes, quenched in water and artificial aging at 100-220o C during respectively 10-240 minutes. After rolling and heat treatment the obtained alloys was corroded in solution of NaCl

Read more