BrainMap

Mr. Dan Mihai Constantinescu

Dr. Eng.

Professor - UNIVERSITATEA NAŢIONALĂ DE ŞTIINŢĂ ŞI TEHNOLOGIE POLITEHNICA BUCUREŞTI

Researcher | Teaching staff | Scientific reviewer | Manager | PhD supervisor

Professor from 2003 in the Department of Strength of Materials. His work concerns experimental and numerical researches for composite and nanocomposite materials with emphases on interlaminar and intralaminar failure in composite materials and their damage. Other interests include the formulation of constitutive equations for static and impact loadings for light metallic alloys and ceramic materials. He was visiting professor at Virginia Polytechnic Institute and State University. He was a Fulbright and DAAD Fellow. He authored two textbooks on fracture mechanics and composites and more than 250 research papers in journals and conference proceedings. He did research in more than 60 contracts, out of which in 25 of them as project director, 5 being done abroad. Head of laboratories: Modelling and Simulation of Behavior and Damage of Materials (from 2004) and Fracture Mechanics and Fatigue (from 2007). Member of the Scientific Committee of Danubia-Adria Society from 2011.

Web of Science ResearcherID: C-4101-2012

Curriculum Vitae (27/04/2024)

Expertise & keywords

Improving Cancer Diagnostics in Flexible Endoscopy using Artificial Intelligence and Medical Robotics Call name: EEA Grants - Proiecte Colaborative de Cercetare
RO-NO-2019-0138 2020 - 2024

Role in this project:

Coordinating institution: UNIVERSITATEA DIN CRAIOVA

Project partners: UNIVERSITATEA DIN CRAIOVA (RO); UNIVERSITATEA NAŢIONALĂ DE ŞTIINŢĂ ŞI TEHNOLOGIE POLITEHNICA BUCUREŞTI (RO); DELTA HEALTH CARE SRL (RO); STIFTELSEN SINTEF (NO); NORGES TEKNISK-NATURVITENSKAPELIGE UNIVERSITET NTNU (ST. Olavs Hospital) (NO); CEETRON AS (NO)

Affiliation:

Project website: http://www.idear.ro

Abstract:

During traditional flexible endoscopy where a video camera is introduced in the lung’s airways or abdominal cavity, it is not possible to detect possibly cancerous lesions located in the small diameter airways at the lung’s periphery, outside the bronchial wall in the lung parenchyma or inside the liver. Therefore, harmful radiation based fluoroscopic guidance is necessary to be used especially for peripheral lessions in the lungs and liver. Improved diagnostic success rates can be achieved with navigation systems and precise automatic robotic devices which control steerable catheters and biopsy tools that can be extended outside the bronchoscope or endoscope.

Our main objective is to develop an advanced (TRL5) prototype of a medical software and robotic platform for Improving cancer Diagnostics in flexible Endoscopy using AI and Medical Robotics (IDEAR) to increase procedure success rate, decrease the patient’s radiation exposure, and reduce procedure cost for early cancer detection and treatment.

The IDEAR platform will allow concomitant visualization of the anatomical target(s), the neighboring anatomy, and the CT/MRI image, will find the optimal pathway to target, and precisely guide bronchoscope/endoscope and biopsy tool to reach the difficult to find target. The most innovative feature of IDEAR is performing both diagnostic and treatment during the same procedure using an advanced smart robotic system and customized instruments with dual electromagnetic-optical tracking.

This project meets the objectives and priorities of the EEA research program by:

- Strengthening the existing long-time cooperation between Romanian and Norwegian universities, hospitals and industry partners: University of Craiova (RO), Politehnica University Bucharest (RO), Delta Health Care SRL (Ponderas Academic Hospital) (RO), SINTEF (NO), Norwegian University of Science and Technology (St. Olavs University Hospital) (NO) and including a new industry collaborator, Ceetron AS (NO).

- Increasing the research infrastructure with additional PhD students and post-doctoral researchers who will train in a highly professional scientific environment.

- Enhancing the performance and visibility of the Romanian science at the international level by publications, conference participation, EU framework grant proposals, but also by disseminating the IDEAR software as an open-source platform to clinical, scientific and industry collaborators from around the world.

Reactive Inkjet Printing of Epoxy Thermoset Composites Call name: P 3 - SP 3.2 - Proiecte ERA.NET
ERANET-M-RIPE4TEC-1 2020 - 2023

Role in this project: Project coordinator

Coordinating institution: UNIVERSITATEA POLITEHNICA DIN BUCURESTI

Project partners: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO); JOANNEUM RESEARCH Forschungsgesellschaft m.b.H. (AT); bto-Epoxy GmbH (AT); Montanuniversität Leoben (AT)

Affiliation: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Project website: http://www.ripe4tec.upb.ro/

Abstract:

The core technology to be developed in the project is reactive inkjet printing as a technology to enable the additive manufacturing of novel thermoset composites based on epoxy-polyamine resins. The technology will allow not only for printing parts of complex shape without the need for casting or subsequent processing, but also the control of the microstructure. We will pioneer heterogeneous epoxies, composed from hard and soft microscale subdomains, with contrast and spatial distribution, which will be designed by modelling such to enhance the overall material toughness, without compromising its strength and modulus. Functionalized nanoparticles will be introduced at specific sites to either produce reinforcement or to enhance energy dissipation. The work will greatly broaden the range of applications of epoxies, will lead to a new thermoset printing technology and will introduce new material design concepts with diverse applications.

Functional hierarchical composites for structural applications Call name: P 3 - SP 3.2 - Proiecte ERA.NET
ERA-M-HIEROCOMP 2015 - 2018

Role in this project: Project coordinator

Coordinating institution: UNIVERSITATEA POLITEHNICA DIN BUCURESTI

Project partners: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO); COMPOZITE S.R.L. (RO)

Affiliation: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Project website: http://www.hierocomp.at

Abstract:

It is proposed to develop a new class of composite materials: functional, hierarchical composites for structural applications. Mechanical properties of these materials will be enhanced by controlling the state and properties of interfaces between reinforcements and matrix at both nano and microscales. The engineered microstructure will also allow monitoring the state of damage while in service. Epoxy-based composites, which have a broad range of structural application in various industries will be considered. The need for epoxies with superior toughness is significant in applications in which vibrations are important (e.g. wind turbine and helicopter blades), in glues and other applications in the automotive industry. The consortium is a close collaboration between two academic partners and three industrial partners from Austria and Romania, with complementary expertise and with the capability to bring the proposed advances from the concept state to specific products.

Performant Applications of Functionally Graded Composites Call name: Joint Applied Research Projects - PCCA 2013 - call
PN-II-PT-PCCA-2013-4-1864 2014 - 2017

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA POLITEHNICA DIN BUCURESTI

Project partners: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO); INTREPRINDEREA METALURGICA PENTRU AERONAUTICA METAV SA (RO); TEHNOMAG S.A. (RO)

Affiliation: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Project website: http://bit.do/comgrad

Abstract:

Today, industry needs materials with complex properties, incoporate on the same structural component. Functionally Graded Materials (FGM) and Functionally Graded Composite Materials (FGCM), developed in the ComGrad project will be processed bu metal powders characterized by the absence of chemical segregation, high purity, fine and uniformly distributed carbides and fine microstructure which will properties will provide complex properties by wear resistance, toughness, ductility and superior job performance of conventional steels..

Objectives of the project are: (1) Establish simple rules of design and design of processing technologies of typical functional gradients for structural components subject of intense abrasive wear, adhesive wear, corrosion and fatigue; (2) Development of prototype industrial applications and demonstrate increase two to three times the performance of the service compared with conventional steels; (3) Demonstration of economic benefits to potential suppliers of fabrication sevices and structural components processed FGM / FGCM as well as users of molds, punches, tools processingof these materials; (4) Implementation in production in 2015, to the SMEs partner in of the manufacture of mold, tooling, punches, processed in FGM / FGCM.

Project implementation methodology is based on the development of five Work Packages (WP), namely, (WP1) Proiectare materiale cu Gradient Functional, (WP2) Designing technologies, processes, Experimental Models;(WP3) Execution (ME) and laboratory experiments, processing components of FGM / FGCM;

(WP4) Achievement prototype mechanical components in FGM / FGCM; patent and dissemination; (WP5) Project management.

Because of the complementary partners in the project, University Polytechnic of Bucharest - Research Center of Applied Mechanics SC IMA-METAV SA Bucuresti, SC TEHNOMAG SA Cluj Napoca, development of the Work Package will generate synergies that allow transforming of the technical knowledge accumulated in project in economic effects.

Modeling and and simulation of material behavior FGM / FGCM in (WP1) will allow gradual spatial architecture optimization of microstructure and providing the information based on which will determine the design rules of these materials. Active experiments achieved in the laboratory phase in (WP2) will assume developing technologies of cold/warm compacting to pressure between 400-700 MPa, sintering and sinterhardening to proper temperature with nature and chemical composition of matrices powders (850 0C, 11000C, 13000C), represing/die closed forging of sintered preforms, extrusion profiles, treatment heat treatment and treatment specific of surface engineering will provide the opportunity for analysis of the properties FGM / FGCM

Analysis of blanks properties FGM / FGCM will require complex laboratory investigations: optical microscopy- LOM, electron microscopy-SEM / TEM, mechanical testing, tests to abrasive wear by pin-on-disk method, adhesive wear by CALO-WEAR method, corrosion in seawater , fatigue resistance, electric arc resistance.

Modeling and in simulation of microstructure in gradual architecture (WP3) in the case of structural components, will allow optimization of the microstructural architecture and processing inl phase "batch ZERO" selected industrial applications of SMEs partner in the project from its own production program.

Properties of prototype industrial applications processed FGM / FGCM will be analyzed by the same laboratory investigations carried out in (WP2), but also by introduction in manufacturing and testing in real working condition of prototype industrial applications to partner SMEs thus ensuring technical transformation technical and scientific knowledge in economic effects.

HIGH PERFORMANCE LIGHTWEIGHT PANELS WITH A NEW OPTIMIZED DESIGN FOR ADVANCED AIRCRAFT STRUCTURES Call name: Joint Applied Research Projects - PCCA-2011 call, Type 2
PN-II-PT-PCCA-2011-3.2-0068 2012 - 2016

Role in this project: Project coordinator

Coordinating institution: UNIVERSITATEA POLITEHNICA DIN BUCURESTI

Project partners: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO); STRAERO-(INSTITUTUL PENTRU CALCULUL SI EXPERIMENTAREA STRUCTURILOR AERO-ASTRONAUTICE) S.A. (RO); UNIVERSITATEA POLITEHNICA TIMIŞOARA (RO); INAS S.A. (RO); SMART MECHANICS S.R.L. (RO)

Affiliation: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Project website: http://www.panouri-compozite-aviatie.ro

Abstract:

The aim to design a structure as light as possible, but without reducing its strength, stiffness and stability can be achieved by using sandwich composite components.The proposed project has innovative ideas based on: 1) identification of new mechanical interconnection solutions for the skins, using elements that cross the core of the sandwich, which are simpler, more cost efficient than those currently in use; 2) design of sandwich panels having an ultralight core spatially folded, or having double or triple core; 3) hybrid assembly solutions of sandwich panels having the core and skins made of dissimilar materials. Three new, original, types of lightweight plane sandwich panels, with increased strength, are proposed as follows: an aluminum one with “truss” type core, having a new geometry; a composite panel with carbon fiber reinforced skins and core having gradual properties made out of three or five layers of different polymeric foams; an orthotropic panel with core made out of polymeric tubes. The curved sandwich panels to be proposed represent innovative solutions with optimized geometries: a metallic cylindrical panel with a network type core made out of aluminum profiles intersected and built-in the polymeric foam, and a spherical panel made out of carbon fiber reinforced composite skins, joined together by using a “truss” type core. Experimental (static and cyclic testing of some joints) and numerical (linear and nonlinear 3D parametric FEM modeling for optimization) means of analysis will be used during the development of the project. Finally, the produced models made from these new sandwich composites will be tested experimentally. Registration of at least two requests of patents concerning the original construction solutions developed within the project will demonstrate the deliverables of this project. Internal homologation of the final products and technologies used by the manufacturing partner will prove the soundness of the engineering applications.

Micro-mechanical modelling of cellular materials with refinements on fracture and damage Call name: Exploratory Research Projects - PCE-2011 call
PN-II-ID-PCE-2011-3-0456 2011 - 2016

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA POLITEHNICA TIMISOARA

Project partners: UNIVERSITATEA POLITEHNICA TIMISOARA (RO)

Affiliation: UNIVERSITATEA POLITEHNICA TIMISOARA (RO)

Project website: http://www.marsavina.ro/index_MMMCM.html

Abstract:

Cellular materials are widely used as cores in sandwich composites, for packing and cushioning. The main characteristics of foams are light weight, high porosity, high crushability and good energy absorption capacity.

Present project propose to develop micro-mechanical models in order to predict the mechanical properties of cellular materials with a focus on modeling the fracture and the influence of damage on the mechanical response.

The main objectives of the project are:

- Better understanding of mechanical behavior of cellular materials.

- Develop micro-mechanical models to estimate mechanical properties of cellular materials.

- Implementation of constitutive material models in Finite Element Analysis.

- Investigating the size effect and notch effect on cellular materials

Evaluating the behavior of cellular materials under dynamic (impact and fatigue) loading.

- Identification of damage mechanisms in cellular materials.

- Investigating the effect of microstructural damage on the mechanical properties of cellular materials.

Project combine analytical methods, with numerical micro-mechanical finite element analysis and experimental investigations: materials testing and investigating the damage mechanisms by digital image correlation and thermography.

The novelty of the project will be highlited by the size and notch effect for cellular materials, and by investigating the effect of microstructural damage on the mechanical response of cellular materials.

Next generation of epoxies for structural applications: nanocomposites with enhanced strength and toughness Call name: Exploratory Research Projects - PCE-2011 call
PN-II-ID-PCE-2011-3-0120 2011 - 2016

Role in this project: Key expert

Coordinating institution: Universitatea Politehnica Bucuresti

Project partners: Universitatea Politehnica Bucuresti (RO)

Affiliation: Universitatea Politehnica Bucuresti (RO)

Project website: http://www.nanocompozite.ro

Abstract:

Epoxies are used today in a variety of applications such as coatings, adhesives and composites. A major limitation of these materials is their low toughness and reduced fatigue resistance. The central objective of this project is to fundamentally modify the mechanical behavior of epoxy by controlling its structure on multiple scales via cross-link density control and filling with nanoscale additives. Carbon nanotubes, graphene and carbon black will be considered as fillers.

The resulting material will have enhanced toughness and crack growth resistance, without reduction in strength. The central concept is to exploit the interplay between the heterogeneity of the base epoxy molecular network and that due to the distribution of nanofillers to create multiscale structures which exhibit enhanced toughness and strength. To this end we propose a combined experimental and modeling and simulation program. Modeling will be used to identify the optimal structure. We will fabricate these systems and use experimental data to validate models and test predictions.

This collaboration between US and Romanian partners is based on preliminary work in this area performed over the last decade at Rensselaer Polytechnic Institute, and brings together participants with expertise in nanocomposites, multiscale modeling of polymers, testing and characterization, as well as a participant from industry. The proposal includes technology transfer and dissemination components, and a management plan.

HIGH TOUGHNESS NANOPRECIPITATED MICROALLOYED STEELS Call name: Joint Applied Research Projects - PCCA-2011 call, Type 2
PN-II-PT-PCCA-2011-3.2-1018 2012 - 2016

Role in this project: Partner team leader

Coordinating institution: METAV - CERCETARE DEZVOLTARE S.R.L.

Project partners: METAV - CERCETARE DEZVOLTARE S.R.L. (RO); UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO); FORJA ROTEC SRL (RO)

Affiliation: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Project website: http://www.metav-cd.ro/ToughNanoMicrAl

Abstract:

Microalloyed (MA) steels are suitable as a replacement for plain carbon steels grades due to their ability to achieve final engineering properties in as hot-rolled condition eliminating the next heat treatments. Compared to the quenched and tempered steels at the same hardness, MA steels have much lower toughness so their further use is restricted to parts not subjected to impact.

The main goal of this project is to develop new microllaoyed steel class with improved toughness and formability as a replacement for low and medium alloyed heat treatable steels. The most innovative aspect of the project will be to use deformation induced ferrite transformation (DIFT) as a way to obtain nanosized Fe3C precipitates and fine ferrite grains.

The research work will be oriented on two main direction:

1. Manipulating the chemical composition considering the factors that influence mechanical characteristics of MA steels, particularly toughness

2. Thermomechanical processing of steel bars in order to obtain advanced grain refinement, for enhanced toughness.

To achieve the project goals several stages will be performed, as follows:

-Identification of solutions to enhance toughness and development of a theoretical model for chemical composition, structure and morphology:

- Development of a laboratory technology in order to obtain high toughness microalloyed steels in specified compositional domains.

- Setting of the thermomechanical processing regime in order to conduct the forging process within warm-forging temperatures for a further enhancement of toughness.

- Industrial applications of high toughness microalloyed steels for warm-forged automotive parts

The new high toughness steels will be the choice for automotive forged parts requiring impact resistance, such as truck side rails, steering links and telescoping crane booms, replacing heat treatable steels thus eliminating the need to subsequent heat treatment with significant cost reduction.

ADVANCED TECHNOLOGIES FOR PROCESSING SURFACES USED IN THE PRODUCTION OF SPARE PARTS AND SUBANSAMBLIES FROM THE AUTOMOTIVE INDUSTRY Call name:
PN II 72-207/2008 2008 - 2011

Role in this project: Partner team leader

Coordinating institution: UNIVERSITATEA PITESTI

Project partners: UNIVERSITATEA PITESTI (RO); UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Affiliation: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Project website:

Abstract:

PERFORMANT COMPOSITE ARMOURES FOR MULTIPLE PROTECTION Call name:
PN II 82-097/2008 2008 - 2011

Role in this project: Project coordinator

Coordinating institution: Institutul National de Cercetare-Dezvoltare pentru Chimie si Petrochimie - ICECHIM Bucuresti

Project partners: Institutul National de Cercetare-Dezvoltare pentru Chimie si Petrochimie - ICECHIM Bucuresti (RO); UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Affiliation: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Project website:

Abstract:

COMPLEX COMPOSITE STRUCTURES MEANT FOR THE BALISTIC PROTECTION OF PERSONS AND CIVIL AND MILITARY EQUIPMENTS, EXPOSED AT IMPACT WITH SUPERSONIC SPEEDS Call name:
PN II, CNMP, Contract. nr. 81-008 2007 - 2010

Role in this project: Partner team leader

Coordinating institution: Institutul National de Cercetare-Dezvoltare pentru Chimie si Petrochimie - ICECHIM Bucuresti

Project partners: Institutul National de Cercetare-Dezvoltare pentru Chimie si Petrochimie - ICECHIM Bucuresti (RO); UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Affiliation: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Project website:

Abstract:

MODELLING AND SIMULATION OF THE BEHAVIOUR OF COMPOSITE MATERIALS AT COMPLEX LOADINGS WITH APPLICATIONS IN AERONAUTICAL ENGINEERING Call name:
amcsit 202/20.07.2006 2006 - 2008

Role in this project: Project coordinator

Coordinating institution: UNIVERSITATEA POLITEHNICA DIN BUCURESTI

Project partners: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Affiliation: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Project website:

Abstract:

INTEGRATED TECHNOLOGICAL PLATFORM FOR THE ELECTROCHEMICAL ENGINEERING OF SURFACES FOR ADVANCED MATERIALS; APPLICATIONS IN THE EVALUATION OF THE INTEGRITY AND RELIABILITY OF THE STRUCTURES Call name:
2006 - 2008

Role in this project: Partner team leader

Coordinating institution: UNIVERSITATEA PITESTI

Project partners: UNIVERSITATEA PITESTI (RO); UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Affiliation: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Project website:

Abstract:

INTEGRATED NETWORK OF MONITORING THE STRUCTURAL INTEGRITY OF THE CRITICAL COMPONENTS FROM THE NUCLEAR COMPONENTS Call name:
CERES 2-CEX06-10-81 2006 - 2008

Role in this project: Partner team leader

Coordinating institution: RENEL RA INSTITUTUL DE CERCETARI NUCLEARE PITESTI

Project partners: RENEL RA INSTITUTUL DE CERCETARI NUCLEARE PITESTI (RO); UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Affiliation: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Project website:

Abstract:

DESIGN AND TESTING OF MULTIFUNCTIONAL COMPOSITE LAMINATES AND SANDWICHES USED FOR ASSURING THE STRUCTURAL INTEGRITY OF STRUCTURES Call name:
CNCSIS nr.23/2004 2004 - 2006

Role in this project: Project coordinator

Coordinating institution: UNIVERSITATEA POLITEHNICA DIN BUCURESTI

Project partners: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Affiliation: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Project website:

Abstract:

PROCEDURE, METHODOLOGY, AND EQUIPMENT FOR THE DYNAMIC TESTING OF VARIOUS ARMOUR PLATES Call name:
AMCSIT / RELANSIN nr.1967/2004 2004 - 2006

Role in this project: Partner team leader

Coordinating institution: Academia Tehnica Militara

Project partners: Academia Tehnica Militara (RO); UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Affiliation: UNIVERSITATEA POLITEHNICA DIN BUCURESTI (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
Peer-review activity for international programs/projects