BrainMap

Mr. Mircea Cristian Dudescu

Prof.dr.ing.

Professor - UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA

Teaching staff | PhD supervisor

Web of Science ResearcherID: C-2090-2011

Curriculum Vitae (16/04/2024)

Expertise & keywords

New cement-based nanocomposite materials for 3D printing applications Call name: P 4 - Proiecte de Cercetare Exploratorie, 2020
PN-III-P4-ID-PCE-2020-0533 2021 - 2023

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA

Project partners: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Affiliation: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Project website: https://pce23.weebly.com/

Abstract:

Improving the properties of cement-based materials is crucial nowadays due to the continuous development of the construction industry. The recent introduction of additive manufacturing (3D printing), has set new challenges for materials design. Now the materials must be not only stronger and sustainable but also with well-defined rheometric properties, to allow them to be printed. The improvements can be accomplished by using various admixtures (fly ash, silica fume, nanoparticles) and additives (superplasticizers, accelerators, retarders, viscosity modifiers) to create new varieties of concrete or mortars. In our previous investigations, we have demonstrated that by using a combination of silica fume and organosilane it is possible to improve the compressive and flexural strength in a significant amount. In the present project, we will try to optimize the rheometric properties of cement-based nanocomposites. Thus, we will investigate the possibility to use the organosilane in combination with silica fume and clay to design a material with longer open time, better buildability, and higher flexural strength. Our preliminary investigations have shown that organosilane can be used both as a retarder and water reducer with a more efficient retarding effect as compared with commercial superplasticizers. Based on our preliminary results, in the present research, a new cement-based nanocomposite mortar will be proposed and laboratory tested as 3D printable material.

Smart buildings adaptable to the climate change effects Call name: P 1 - SP 1.2 - Proiecte complexe realizate in consorții CDI
PN-III-P1-1.2-PCCDI-2017-0391 2018 - 2021

Role in this project: Partner team leader

Coordinating institution: UNIVERSITATEA POLITEHNICA TIMIŞOARA

Project partners: UNIVERSITATEA POLITEHNICA TIMIŞOARA (RO); UNIVERSITATEA TEHNICA DE CONSTRUCTII BUCURESTI (RO); UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO); INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU INGINERIE ELECTRICA ICPE - CA BUCURESTI (RO); INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU ELECTROCHIMIE SI MATERIE CONDENSATA - INCEMC TIMISOARA (RO)

Affiliation: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Project website: https://www.icer.ro/cercetare/proiecte-de-cercetare/cia-clim

Abstract:

In the construction domain, the energy represents the key-point in achieving efficient buildings.

The project proposes the improvement or institutional performances between three universities and two research institutes for the revival of the research activities and transfer of knowledge between partners.

The 4 proposed projects, centred on the efficient energy buildings, are focused on two principal research directions: (i) use of smart facades with low-thermal transfer, actively integrated for the enhancement of internal comfort and possessing a passive control of energy (by using the solar energy) and (ii) smart energy efficiency through building automatization and solar energy collectors. The resulted system, the smart house, is conceived thus to minimize the input energy for maintenance.

The Project 1 has as main objective the determination of mechanical properties of cellular materials used as thermal insulations in smart façade systems, through mechanical compression, bending and toughness fracture testing of such cellular materials.

Project 2 is focused on obtaining, characterizing and testing of high-property materials used for smart facades as thermal insulation materials and as support for special property layers: photo-catalytic layers and with reduced absorption/reflexion of UV-VIS-IR radiation.

The Project 3 has as main objective the theoretical and experimental investigation of the implementation of the electric power distribution in direct current for individual households or in small communities (smart-grid), with renewable energy sources integration.

The scope of the Project 4 is to implement the knowledge and data resulted from projects no. 1-3 through a modular laboratory demonstrative application. The project will perform an integrated study on the influence of the facades and the energetic contribution to the internal comfort of the building by considering different façade systems and respectively by integrating a smart-grid energy system.

SC Artecom SRL upgraded competences through deep soil tillage machinery optimisation Call name: P 2 - SP 2.1 - Transfer de cunoaștere la agentul economic „Bridge Grant”
PN-III-P2-2.1-BG-2016-0305 2016 - 2018

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA

Project partners: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO); INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU MASINI SI INSTALATII DESTINATE AGRICULTURII SI INDUSTRIEI ALIMENTARE - INMA (RO); ARTECOM SRL (RO)

Affiliation: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Project website: http://www.subsoil.utcluj.ro/

Abstract:

The aim of this project is to increase the competitiveness of the company - SC ARTECOM SRL through optimisation of the deep soil processing equipment – agricultural scarifier. This will be achieved by numerical and experimental evaluation of equipment characteristics, respectively through design optimization of it’s component with emphasis over the active tillage tools.

As a result of the optimization of the structure of equipment for working the soil at great depth (resistance frame and working parts), the mass of equipment should be reduced through better design geometry An increase of the mechanical strength and reducing the parts wear is expected, by this reducing the fuel consumption of the tractor through a reduction of equipment weight and reduced drag. As a direct effect a lower environmental fingerprint will occur (reduced quantity and concentration of fuel emissions). More than that, taking into account the conservation tillage principles as guiding design procedures, soil minimum disturbance will occur (through optimized working parts geometry), reducing the soil compaction (as a decrease of machinery weight); lowering the cost price of equipment manufactured by SC ARTECOM SRL by reducing the quantity of materials and raw materials, improving the manufacturing process as a result of optimization of equipment components. Through all that a competing advantage will emerge in comparison with competitors similar products, by reducing costs and improving the key performance indices of the optimized product.

Optimizing the fiber reinforced polymer composite materials and manufacturing technology used in the producing body elements for electric vehicles Call name: P 2 - SP 2.1 - Transfer de cunoaștere la agentul economic „Bridge Grant”
PN-III-P2-2.1-BG-2016-0210 2016 - 2018

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA

Project partners: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO); BELCO AVIA SRL (RO)

Affiliation: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Project website: http://96bg.utcluj.ro

Abstract:

The project aims to carry out research on optimizing fiber reinforced polymer composite materials and manufacturing technology used in the producing of body elements for electric vehicles. The traditional materials will be replaced with new materials in order to achieve lighter structures, having superior mechanical characteristics. These components made out of composites materials will be also cost effective and more competitive. BELCO AVIA SRL Company considered one of the biggest companies in Romania, producing composite parts with high performance. This company requested the collaboration of Technical University of Cluj-Napoca researchers, to solve the manufacturing problems they are facing, related to electric vehicles body components made of composite materials. They identified two main problems that require a strong expertise and technology transfer. The first major requirement is to reduce manufacturing costs. A present the autoclave they use, involves high consumption of electricity, and high costs required to molds manufacture, which must be resistant to high temperatures over 120 ºC. The other main issue is the need for a new approach on how to the design new composite materials. They must have a fiber orientation, depending on existing stresses in the electric vehicle components. Reduction the layers of reinforcing material, hybrid materials sandwich introduction, and optimal design of the layers of reinforcement material are issues that will be sorted out. New methods of design and manufacture the composite components, will allow to produce cost effective parts, with better functional characteristics.

3D Printing process optimization, for personalized dental applications Call name: P 2 - SP 2.1 - Transfer de cunoaștere la agentul economic „Bridge Grant”
PN-III-P2-2.1-BG-2016-0345 2016 - 2018

Role in this project:

Coordinating institution: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA

Project partners: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO); ZIRCON DENT SRL (RO)

Affiliation: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Project website: http://www.optidep.utcluj.ro

Abstract:

The aim of the OpTi-DeP project is to develop and improve the medical applications of the new 3D printing technologies, to adapt and transfer these modern technologies from the laboratory research level, to practical medical applications, within the Zircon Dent private company from Cluj-Napoca, who recently purchased the Selective Laser Melting (SLM) equipment. The purpose of the ZD company is to increase the technical performances and economical efficiency of the new 3D printing equipment purchased in 2015 (SLM machine, type Sisma, cost about 230.000 euro). This expensive equipment needs research activities to be undertaken, in order to adapt and improve the SLM manufacturing of the personalized dental prosthesis, using advanced materials, such as the fine CoCr metal powder. Within the AM (Additive Manufacturing) laboratories from Dept. of Manufacturing Engineering (DME) from Technical University of Cluj-Napoca (TUC-N), there is a strong experience on AM. At DME Cluj, there was first AM equipment installed in Romania, 20 years ago. The advance researches developed at DME Cluj have had significant results, both theoretical, such as scientific publications, patents and published books on AM and practical applications, including the medical field. More than 70 surgical operations have been undertaken in hospitals from Bucharest and Cluj, using personalized implants made by AM at DME Cluj. The OpTi-DeP project has specific objectives, to optimize the SLM technology for the Sisma 3D printing equipment purchased by ZD partner, in order to increase the productivity of the new SLM process, by improving the process parameters for the biocompatible CoCr powder, used by ZD Company from Cluj to produce personalized dental prostheses. The surface of the dental prosthesis made at the ZD company, will be smoother, with better adherence properties, after the implementation of the OpTi-DeP project.

Fabrication of a MEMS Switch with Robust Metal Contact Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2016-1727 2017 - 2018

Role in this project:

Coordinating institution: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA

Project partners: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO); INSTITUTUL NATIONAL DE CERCETARE- DEZVOLTARE PENTRU MICROTEHNOLOGIE - IMT BUCURESTI INCD (RO)

Affiliation: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Project website: https://minas.utcluj.ro/Proiect_PED_2016/Objectives.html

Abstract:

Two of the major failure causes of MEMS switches are: contact fatigue and stiction. The adhesion effect which is responsible for the stiction failure of MEMS switches is a major issue for micro and especially nano- switches. The surface properties, the materials of electrodes and the optimal energy for commutation of MEMS switches have to be adequate estimated in order to avoid the collapse of the flexible electrode to substrate after the driving force is removed. Based on the effects which have to be considered in MEMS switches, from the interfacial forces (capillary, van der Waals, Casimir and electrostatic forces) and topography of surfaces (roughness, flatness) to the material properties and manufacturing conditions, the stiction effect still remain a major concern in MEMS. If the materials of electrode are not adequate for switching applications and the operating conditions are not properly, the lifetime of MEMS switch is very short.

The main scope of the project is the accuracy characterization of the mechanical and tribological properties of MEMS materials, their correlation with MEMS switch structures and the analysis of interatomic contact behavior, considering multiphysics electro-thermo-mechanic coupling in order to obtain an excellent reliability as well as a high lifetime. Interatomic coherence between electrodes during switching is investigated. Nanotribological investigations include adhesion, friction and wear measurements of MEMS switch materials in different operating conditions. The actuation of this MEMS switches is based on the out-of-the plane displacement of the mobile electrode under a thermal gradient generated by the applied actuation voltage. It can be used either as a capacitive switch or as a metal-to-metal one. The out-of-plane thermal MEMS switches can be monolithically integrated in RF applications. At the end of project a prototype of a reliable MEMS chevron type switch with high lifetime will be a delivered.

Developing and testing of a new concrete with higher flexural strength obtained through the addition of nanoparticles and organosilane Call name: P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2016-0719 2017 - 2018

Role in this project:

Coordinating institution: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA

Project partners: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Affiliation: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Project website: https://ped125.weebly.com/

Abstract:

Betonul este un material cu o rezistență foarte mare la compresiune dar cu o rezistență la încovoiere extrem de scăzută. Acesta este motivul pentru care, în practică, acest inconvenient a fost depășit prin încorporarea de oțel. Din păcate, producția de oțel necesară pentru o industrie a construcțiilor în continuă creștere este o sursă majoră de poluare. În consecință, dezvoltarea unor noi materiale pe bază de ciment, cu o rezistență de încovoiere mărită este esențială pentru industria de construcții. Soluția de obținere a unor astfel de betoane pare să fie în domeniul nanotehnologiei. Investigațiile noastre anterioare au demonstrat că prin utilizarea unei combinații de pulbere de cuarț și organosilan este posibil să se crească atât rezistența la încovoiere cat si la compresiune. Aceste efecte se datorează naturii hidrofile a organosilanului și reactivitații terminatiilor moleculelor de silan cu grupările -OH prezente atât pe suprafața de silice șcât și pe matricea de ciment. În proiectul de față ne propunem să continuăm cercetările anterioare, într-un mod sistematic, folosind praf de silice în loc de pulbere de cuarț și să dezvoltăm un beton cu rezistență la încovoiere chiar mai mare și o permeabilitate mai scăzută. Avantajul principal al utilizării prafului de silice în locul pulberii de cuarț este că silicea are reactivitate pozzolanică, are dimensiuni mai mici ale particulelor și este un produs secundar al industriei, care va crește importanța ecologică a materialului produs. Investigatiile noastre vor utiliza pentru prima dată avantajele oferite de difuzometria si relaxometria de rezonanță magnetică nucleară (RMN) in câmpuri joase. Rezultatele investigațiilor RMN vor fi comparate cu măsurătorile de rezistență la incovoiere și compresiune, în scopul găsirii compoziției optime a betonului.

Advanced design of micromembranes with multiple degrees of freedom for optical MEMS applications Call name: Projects for Young Research Teams - RUTE -2014 call
PN-II-RU-TE-2014-4-1271 2015 - 2017

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA

Project partners: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Affiliation: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Project website: http://minas.utcluj.ro/Proiect_TE_2015/index.html

Abstract:

The main goal of the project is designing, manufacturing and testing of micromembrane with high mobility. The field of implementation of these micromembranes is in optical Microelectromechanical systems. The aim of this research is to obtain reliable microsystems by designing and manufacturing of micromembranes with multi degrees of freedom mobility. Compared to conventional membranes embedded boundaries which are characterized by a high stress state under deformation, the MEMS micromembranes present a lower cost solution with a long lifetime. The mobility of the MEMS membranes is given by the geometry of the hinges and their reliability is given by the geometrical dimensions and material properties. In optical MEMS applications, reliability and lifetime of the entire system depends on the behavior of flexible mechanical elements (which is influenced by the state of stress, the fatigue, hinges deformation in different planes) but also on the material behavior (hardness, elasticity module, coefficient of thermal expansion). The materials used to fabricate micromembranes will be investigated in order to estimate the mechanical properties and the temperature influence on them. In optical applications, temperature has a negative effect on material properties with influence on static and dynamic responses of micromembranes.

Reconfigurable Haptic Interfaces used in Dynamic Contact Reproduction - Theoretical and Experimental Developments Call name: Joint Applied Research Projects - PCCA-2011 call, Type 1
PN-II-PT-PCCA-2011-3.1-0190 2012 - 2016

Role in this project: Key expert

Coordinating institution: INSTITUTUL DE MECANICA SOLIDELOR

Project partners: INSTITUTUL DE MECANICA SOLIDELOR (RO); UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Affiliation: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Project website: http://www.imsar.ro; http://www.imsar.ro/html/_pn_ii-pt-pcca-2011-_3_1-019.html

Abstract:

The overall goal of the proposed project is to develop a Road Response Simulator (acronym: HD RoReSi), designed as a Reconfigurable Haptic Interface that includes Real-Time Dynamic Contact Simulation in its Control System. This product enables the validation of a new concept regarding the dynamic contact in real-time reproduction, developed so to overcome the current limitations in the field (i.e. road simulation, tire-road contact, vehicle suspension modeling and incorporation of haptics into virtual environments (VEs), respectively). In this way, the targeted topic contributes toward larger technological and commercial goals. This ambitious scope will be attained through the collaboration between multidisciplinary fields that have traditionally been considered separately, i.e. impact/contact reproduction and detection, new modular reconfigurable dynamical structures; haptics in multimodal VEs, and control devices. The research will be validated through an end product - a real reconfigurable experimental prototype. The new product will improve performances for vehicles (comfort, dynamic skills), increase in driving awareness and safety, decrease in traffic accidents, and reduce the maintenance cost, respectively. The quality, cost and flexibility in use of the new product make differences relative to existing offerings from major global competitors. The project will advance a challenge for the future in the area of haptics and road response simulators, by processing new scientific knowledge into the field of the computer haptics (analogous to computer graphics) and the human-machine intelligent interaction, without expensive VEs and computational power. The consortium possesses the necessary and complementary key qualifications to meet project objectives and results and also to overcome the project risks.

Nanomechanical and Nanotribological Characterization for Reliability Design of MEMS Resonators Call name: Projects for Young Research Teams - TE-2011 call
PN-II-RU-TE-2011-3-0106 2011 - 2014

Role in this project: Key expert

Coordinating institution: Universitatea Tehnica din Cluj-Napoca

Project partners: Universitatea Tehnica din Cluj-Napoca (RO)

Affiliation: Universitatea Tehnica din Cluj-Napoca (RO)

Project website: http://minas.utcluj.ro/NARDEMS/index.html

Abstract:

The accuracy detection, the reliability and the lifetime of Microelectromechanical Systems (MEMS) are crucial parameters in different applications and these are strongly influenced by the material properties.

The main scope of project is mechanical and tribological characterizations of MEMS resonators for their reliability design considering theoretical approaches, finite element analysis, optimizations with Genetics Algorithms and advanced experimental investigations. The mechanical properties of interests are modulus of elasticity, stiffness, stress, strain, and fatigue. The tribological characterizations are developed to estimate the stiction and friction. Accelerated testing for lifetime prediction of MEMS, developed in project and the individual characterization of materials and structures are performed using advanced techniques as Atomic Force Microscopy, Nanoidenter and Vibrometer Analyzer.

Two of the major failure causes in MEMS which operate under adequate conditions and which cannot be predicted from the initial designing steps are stiction - when the flexible plate collapses to substrate, and fatigue - which can manifest itself as the loss in the accuracy of response under an acting signal or as fracture under cyclic loadings. The influence of MEMS materials on stiction is determined and recommendations to avoid this effect are provided. The analysis of the fatigue stress in MEMS resonators will predict their lifetime under cyclic actuation.

Call name: Premierea obtinerii atestatului de abilitare - Competitia 2015
PN-II-RU-ABIL-2015-2-0223 2015 -

Role in this project: Project coordinator

Coordinating institution: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA

Project partners: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Affiliation: UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)

Project website:

Abstract:

FILE DESCRIPTION	DOCUMENT
List of research grants as project coordinator or partner team leader
Significant R&D projects for enterprises, as project manager
R&D activities in enterprises	Download (43 kb) 19/03/2017
Peer-review activity for international programs/projects