Instituto de investigaciones en ciencia
Research areas Fracture mechanisms of materials damage
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- For more information about Welding Fracture Mechanics Division contact
Research areas
This area is involves experimental, and numerical activities dedicated to the development of theoretical models for the prediction and characterization of damage mechanisms induced by cracks or crack-like defects. Undergoing research activities include topics related with stress corrosion cracking and multiple crack propagation in steels, decohesion models in polymers, fiber-matrix debonding composites, and cracking of microheterogenous materials.
Work in this area aims to the development of technological tools for the prediction of fatigue damage. Variables under analysis range from microstructural to macroscopic, including the effects of notches and other geometrical discontinuities, residual stresses, load history and welding process.
Research activities in this area are dedicated to the design and construction of a scaled Mannesmann rotary piercing mill. The scaled prototype is used to analyze tribological mechanisms acting in the perforation mandrel during the seamless pipe forming. The experimental work is complemented with numerical simulations.
Numerical modeling constitutes a key tool for most of the research activities of the group. Within this framework, both commercial and in-house developed FEM and BEM codes are used. At the same research activities are carried out in the theoretical aspects of the BEM and mesh less methods and structural shape optimization. Research Projects in Cooperation The group participates of the following international projects:
and has signed research cooperation agreements or works in close collaboration with:
The group has an important expertise in offering the following services to the local and national industry:
For more information about Welding & Fracture Mechanics Division contact:Prof. Adrián Pablo Cisilino (Head of Welding & Fracture Mechanics Division) E-mail: cisilino@fi.mdp.edu.ar Phone: 54-223-4816600 -247 Fax: 54-223-4810046
13 Associate Professors 7 Research Associates 19 Graduate Students 3 Technicians 1 Undergraduate Students Research Subjects: 1- Advanced Materials from Thermosetting Polymers Objectives: The development of advanced materials based on thermosetting polymers, obtained by polymerization induced phase separation or by dispersion of nano-reinforcements or a combination of particles and fibers. Different materials currently studied are: thermal-reversible light scattering films, amphiphilic networks, thermosetting polymers toughened by a dispersion of thermoplastic polymers, nano-reinforcements or a combination of natural fibers and particles. Current Projects: 1.- Thermal reversible light scattering films based on dispersions of organic crystals, liquid crystals, or their solutions in polystyrene, in an epoxy matrix. 2.- Amphiphilic networks. 3.- Poly(isobutylene) as a modifier of acrylic networks. 4.- Vinylester resins modified by dispersion of a thermoplastic polymer: effect of the composition and curing conditions on the morphology and properties of the material. 5.- Polymeric precursors from tannin and vegetable oils renewable resources. 6.- Unsaturated polyester resins modified with functionalized silica particles or dispersions of natural fibers and particles. 7.- Fluorinated Polymer Networks. 2- Thermoplastic Polymers Objective: The development of new characterization methods and the modelling of molecular structures and morphologies present in thermoplastic blends and alloys. Experimental measurements and termodynamic, kinetics and difussion models are used to determine and predict molecular morphologies in reactive and non reactive blends. Current Projects : 1.- Characterization of semicrystalline copolymer blends. 2.- Mechanical properties of polymer blends and alloys. 3- Composite Polymeric Materials Objectives: To determine the relationship between structure, processing conditions and final properties of the composite materials. The effect of the interface/interphase modification of the incorporated particles or fibers on the final properties is also studied using mechanical (short beam tests, bending tests, compression) and dynamic-mechanical tests. Current Projects: 1.- Nanocomposites based on phenolic resins characterization and adhesion to metals. 2.- Structural composites based on thermoset and gloss fibers (water absorption, dielectric and mechanical properties, and processing). 3.- Composites based on biodegradable polymers (crystalization, thermal and biodegradation, mechanical properties) 4.- Composites made from polymeric matrices (synthetic and natural) and vegetable fibers or particles (wood flour, sisal, jute, bagasse) 5.- Heterogeneous phase separation: Effect of the addition of fibers into a matrix thermoplastic/thermoset). 6.- Study of composite processing: Pultrusion and RTM. 7.- Dynamical mechanical analysis of composite materials. 8.- Micro and Nano composites based on polyurethanes and cellulose. 4- Polymer Engineering: Deformation and Fracture of Polymeric Materials: Objectives: The determination of thermoviscoelastic and ultimate mechanical properties of polymers and composites. Current Projects: 1.- Structural characterization of polymeric materials to be used in the manufacture and lining of pipes and containers to contain and distribute gas, petroleum and its derivatives. Short and long term performance. 2.- Fracture toughness. Ductile-brittle transition-weldability. Deformation. 3.- Deformation, fracture, yield and michromechanisms of failure in novel polymeric blends (HDPE/PET, PP/Engage), and nanoclay based nanocomposites of HDPE and Nylon. Simulation and experimental work. 4.- Polymer processing: moulding design. 5- Biomedical Polymers Objetives : Reprocessing study of polymeric biomedical devices. Identification of specific device material parameters affected by the selected sterilization protocol. Formulation of surgical cements with improved long term performance. Synthesis of polymeric systems required for hard tissue engineering products. Development of polymeric membranes for therapeutic applications. Current Projects : 1.- Reprocessing of PVC catheters and canules applied in cardiovascular area 2.- Development of acrylic-based bone cement formulations with other copolymers and antibiotics. Mechanical properties of composite surgical cements 3.- Preparation of bioresorbable polymeric scaffolds for bone tissue engineering 4.- Synthesis of boron-complexed polymeric films for the treatment of endemic diseases 5.- Polymeric materials for dental applications 6- Organic-inorganic hybrid materials Objectives: Development of organic-inorganic hybrid materials based on functionalized silsesquioxanes. Current projects:
2. Coatings based on functionalized silsesquioxanes on metallic substrates Scientific Cooperation with the following institutions Universidad Nacional de Quilmes, Argentina PLAPIQUI (UNSur - CONICET), Argentina Facultad Regional Concepción del Uruguay, Argentina University of Peruggia at Terni, Italy INSA de Lyon, France Universidad Federal do Rio Grande do Sul, Brazil University of Chile, Santiago, Chile. University of Valladolid, Spain University of La Coruña, Spain University of Alicante, Spain Institute of Science and Technology of Polymers, CSIC, Madrid, Spain Politécnico de Milano, Italy University Carlos III, Madrid, Spain University of País Vasco, Spain Royal Institute of Technology, Stockholm, Sweden University of Southern California, Los Angenles, USA Yüklə 172,85 Kb. Dostları ilə paylaş:
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