A5013211784- Structural Health Monitoring Techniques
- Masonry and Concrete Structural Analysis
- Seismic Performance and Analysis
- Wind and Air Flow Studies
- Additive Manufacturing Materials and Processes
- Probabilistic and Robust Engineering Design
- Building materials and conservation
- Space Satellite Systems and Control
- Structural Engineering and Vibration Analysis
- Astro and Planetary Science
- Advanced materials and composites
- Infrastructure Maintenance and Monitoring
- Synthetic Aperture Radar (SAR) Applications and Techniques
- GNSS positioning and interference
- High Entropy Alloys Studies
- Titanium Alloys Microstructure and Properties
- Fluid Dynamics and Vibration Analysis
- Advanced machining processes and optimization
- Aerodynamics and Fluid Dynamics Research
- Bone Tissue Engineering Materials
- Space exploration and regulation
- Structural Analysis of Composite Materials
- Target Tracking and Data Fusion in Sensor Networks
- Ultrasonics and Acoustic Wave Propagation
- Radar Systems and Signal Processing
Politecnico di Milano
2021-2024
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2024
University of Florence
2007-2023
Turbocoating (Italy)
2014-2016
University of Trento
2006-2012
Torrey Pines Institute For Molecular Studies
1996
Purpose The aim of the paper is study change in mechanical properties (and particular ductility), with microstructure, a biomedical Ti‐6Al‐4V alloy produced by different variants selective laser melting (SLM). Design/methodology/approach SLM has been mechanically characterized through tensile testing. Its microstructure investigated optical observation after etching and X‐ray diffraction analysis. Findings applied to produces material martensitic microstructure. Some microcracks, due effect...
Purpose The purpose of this paper is the microstructural and mechanical characterization a biomedical Ti‐6Al‐4V alloy produced by electron beam melting, study stability as‐built microstructure upon heat treatment. Design/methodology/approach melting has been mechanically characterized through tensile fatigue testing. Its investigated optical observation after etching X‐ray diffractometry analysis. material deepened carrying out suitable treatments, an analysis dilatometry test. Findings very...
Abstract A 17–4 precipitation‐hardening stainless steel produced by selective laser melting contains 72% metastable and heavily faulted austenite 28% highly dislocated twinned martensite. The mechanical behavior is characterized exceptional work hardening a two‐step plastic field, which are due to the strain‐induced transformation of structural characteristics deformed Both phases tend accumulate stacking faults in first step twins second.
Abstract The growth of both operational satellites and orbital debris is creating the requirement for more robust Space Surveillance Tracking (SST)-related applications. These systems necessarily must leverage ground-based sensors (optical radar) to realise higher performance solutions. In this context, European Union (EUSST) consortium groups national agencies institutions, in charge carrying out following services: conjunction analysis, fragmentation analysis re-entry prediction, Italian...
The Electron Beam Melting (EBM) CoCrMo alloy is currently utilized for the production of joint replacements and fixation devices thanks to its high strength, good wear corrosion resistance, excellent biocompatibility. Even if use in biomedical sector intensive it usually subjected various machining operations implants after rapid manufacturing step, scientific literature lacks comprehensive data about machinability. Therefore, objective paper investigate machinability characteristics EBM...
Electron Beam Melting (EBM) is attracting large interest among the manufacturers of surgical implants as a near-net shape technology. Titanium alloy Ti6Al4V widely used in biomedical field thanks to its high biocompatibility, corrosion resistance and mechanical properties. The chemistry microstructural features EBM indicate lower machinability comparison with wrought Ti6Al4V. Aim paper present between semi-finishing external turning, by quantifying effects cutting speed feed rate. Tool wear,...
This paper summarizes the results of a two-day dynamic monitoring Michelangelo's David subject to environmental loads (city traffic and pedestrian loading induced by tourists visiting Accademia Gallery). The was carried out no-contact technique using an interferometric radar, whose effectiveness in measuring resonant frequencies structures historic monuments has proved over last years through numerous activities. Owing behavior measurement system (radar tripod), accelerometer been installed...
The implementation of proper strategies conservation heritage structures requires the collection heterogeneous sources information (historical evolution, past restoration works, experimental data, monitoring systems results, etc.). handling this data needs an effective informative modelling, able to collect different type by using 3D parametric model. Heritage Building Information Modelling (HBIM) can be considered a promising tool for monuments which have protected along centuries, thanks...
The population of objects in space has increased dramatically over recent decades. Space debris now represents the majority resulting from inactive satellites, breakups, collisions and fragmentations. It become a concern for institutions all world and, as such, it led to fostering several programmes counter issues. Among these, use ground-based sensors Surveillance Tracking (SST) activities services tools analysing fragmentations play crucial role. This work presents carried out by...
The structural assessment of existing masonry towers under exceptional loads, such as earthquake requires reliable and expedite methods analysis. These approaches should take into account both the specific nonlinear behavior material (for instance, small tensile strength) randomness that affect material's properties (in some cases distribution elastic parameters too). Considering need simplified but effective to assess seismic response a class structures, paper proposes an expeditious...
The numerical model of existing masonry buildings, especially in case monumental constructions, must consider the unavoidable lack knowledge and consequent effects uncertain parameters (material properties, geometry, boundary conditions, etc.). In this work, a Bayesian approach is proposed to update finite element towers by using experimental data. San Gimignano (Italy) were considered as an effective study test thanks availability both geometric data dynamic measurements. possibility obtain...
Historical masonry towers constitute a great part of Italian built heritage: wonderful and bell-towers can be observed all over the territory. Such structures exhibit many aspects which are difficult to describe from numerical point view. Among most common: i) restraint condition at their base is not exactly clear as they often embedded in other buildings (such church bell-towers); ii) material behavior very made three layers, each one with different mechanical characteristics. Simplified...
This paper presents a new surveying technique that can be employed with hardly reachable structures or extensive structures. The is based on an interferometric radar device, which positioned up to 2 km away from the structure examined and record displacement measurements sampling frequency of 100 Hz accuracy 0.1 mm. results given by are compared those set three accelerometers test (namely, steel cable-stayed footbridge) for different loads: symmetric dynamic load, eccentric load quasi-static...
Additive Manufacturing (AM) techniques are more and employed in the biomedical industry to produce surgical implants made of Ti6Al4 V alloy. After AM process, some finishing machining operations still required obtain final product geometry. In recent years, cryogenic cooling has been adopted improve poor machinability, but mainly rough operations. This paper investigates feasibility when turning acetabular cups Electron Beam Melted (EBM) V, focusing on obtainable surface integrity...
The aim of this article is to propose a new radar concept for the monitoring space debris in order increase performance with respect traditional radars. Once put operation, sensor will be able improve surveillance and tracking services within network EUSST consortium. architecture based on past experience observing using called BIRALES (BIstatic Radar LEo Survey). transmitting antenna that described paper emitter BIRALES. It designed very flexible any type observations, modifying its...
The aim of this article is to present an innovative radar for monitoring the space wastes in order mitigate growing numbers debris and related risk astronauts human activities general. proposed architecture a bistatic named BIRALES (BIstatic Radar LEo Surveys) one sensors European Space Surveillance Tracking (EUSST) network. In paper, concept detection LEO (Low Earth Orbit) presented some important results are shown.