Cioboata Daniela Doina
@mhtc.ro
Smart Measurement Mechatronics
National Institute for Research and Development in Mechatronics and Measurement Techniques
RESEARCH, TEACHING, or OTHER INTERESTS
Multidisciplinary, Industrial and Manufacturing Engineering, Materials Science, Health (social science)
Scopus Publications
Scopus Publications
Edgar Moraru, Alina-Maria Stoica, Octavian Donțu, Sorin Cănănău, Nicolae-Alexandru Stoica, Victor Constantin, Daniela-Doina Cioboată, and Liliana-Laura Bădiță-Voicu
MDPI AG
Due to the expansion of the use of powder bed fusion metal additive technologies in the medical field, especially for the realization of dental prostheses, in this paper, the authors propose a comparative experimental study of the mechanical characteristics and the state of their microscale surfaces. The comparison was made from material considerations starting from two dental alloys commonly used to realize dental prostheses: Ni-Cr and Co-Cr, but also technologies for obtaining selective laser melting (SLM) and conventional casting. In addition, to compare the performances with the classical casting technology, for the dental prostheses obtained through SLM, the post-processing stage in which they are in a preliminary finishing and polished state was considered. Therefore, for the determination of important mechanical characteristics and the comparative study of dental prostheses, the indentation test was used, after which the hardness, penetration depths (maximum, permanent, and contact depth), contact stiffness, and contact surface were established, and for the determination of the microtopography of the surfaces, atomic force microscopy (AFM) was used, obtaining the local areal roughness parameters at the miniaturized scale—surface average roughness, root-mean-square roughness (RMS), and peak-to-peak values. Following the research carried out, several interesting conclusions were drawn, and the superiority of the SLM technology over the classic casting method for the production of dental prostheses in terms of some mechanical properties was highlighted. At the same time, the degree of finishing of dental prostheses made by SLM has a significant impact on the mechanical characteristics and especially the local roughness parameters on a miniaturized scale, and if we consider the same degree of finishing, no major differences are observed in the roughness parameters of the surfaces of the prostheses produced by different technologies.
Daniela Doina Cioboata, Mircea Udrea, Mihai Selagea, Danut Iulian Stanciu, Silvia Savencu, Radu Mihail Udrea, and Cristian Logofatu
Springer International Publishing
Daniela CIOBOATĂ, Mihăiță Gabriel NEACŞU, Dănuț STANCIU, Silviu Ștefan MATEI, and Irina NEACŞU
Editura Electra
This paper presents an approach to develop a brushless DC motor to assist an electric power steering. Optimal design for electric power steering system implies the adequate selection of topology, technology, sizes and control algorithm. This paper briefly describes the electric power steering system structure, the most used topologies of electric power steering and the advantages of using brushless DC motors for electric power steering assistance. An electric power steering architecture is proposed. The method of design the brushless DC motor for this electric power steering is presented. Design of the brushless DC motor was based on the analysis of the requirements of the EPS systems, analysis of the control methods, modelling and simulation in MATLAB/SIMULINK. Simulation for six various conditions are presented and analysed for optimal sizing of the electric motor. An experimental model of the designed motor has been manufactured for validation.
Cioboată Daniela, Soare Adrian, Stanciu Dănuț, Abălaru Aurel, and Logofătu Cristian
Springer International Publishing
Daniela Cioboata, Aurel Abalaru, Danut Stanciu, Logofatu Cristian, and Dorel Aiordachioaie
IEEE
Before processing, mechanical vibrations need measurement and some raw processing steps are necessary as filtering, digitization and transmission. Examples of specialized equipment and applications are presented and discussed, mainly from technological point of view.
Ionuţ Ghionea, Adrian Ghionea, Daniela Cioboată, and Saša Ćuković
Springer International Publishing