| KEYWORD |
Prototyping system, method, and device for measuring the compliance of instrumented durometers on nano, micro, and macro force scales
keywords CALIBRATION, DESIGN, FINITE ELEMENT ANALYSIS AND SIMULATION, INSTRUMENTED INDENTATION TEST, MANUFACTURING, TOLERANCE VERIFICATION
Reference persons MAURIZIO GALETTO, GIACOMO MACULOTTI
Research Groups Ingegneria della qualità
Thesis type APPLIED RESEARCH, EXPERIMENTAL - DESIGN
Description The measurement of mechanical properties of materials is essential for the development of innovative alloys, manufacturing processes and component finishing. Instrumented Indentation Test (IIT) is an non conventional hardness test that allows the evaluation of mechanical properties such as hardness, Young's modulus, relaxation and creep of materials. This test involves applying a force to a sample of test material using an indenter. Instrumented Indentation Test is particularly relevant from an industrial point of view because it allows the properties of mechanical components to be evaluated on the final component, thus without the requirement for ad-hoc test specimens. In addition, by continuously measuring the applied force and the penetration of the indenter into the material, mechanical properties at micro and nano scales can be resolved, enabling the characterization of composite materials. Therefore, such a characterization method finds wide use in the mechanical, automotive and aerospace fields, in the development phase of innovative alloys (including through additive manufacturing) and in the qualification of manufacturing processes and heat treatments (see, for example, high-temperature use for turbine blades, characterization of CerMet-type composite coatings, identification of internal porosity, profiling of mechanical properties orthogonally to the surface).
Testing machines require calibration to correct for systematic errors, including those due to the elasticity of the machine itself. The research activity will support the design, numerical validation of the design (by finite element analysis), fabrication (by both machining and additive manufacturing) and metrological characterization and functional validation of a device for calibrating instrumented indentation testing machines. The activity is in support to a "Proof of Concept" project for the prototyping and industrialization of a currently filed patent application. Particularly challenging aspects of the activities will be the analysis and numerical simulation of additive manufacturing polymeric materials for component fabrication, as well as the experimental validation part in metrology.
The activity will last 6 months, full time, possibility of scholarship.
Required skills Mechanical design, data analysis, finite element analysis and simulation.
Deadline 31/10/2023
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