A5040322620- Mechanical Behavior of Composites
- Polymer crystallization and properties
- Tribology and Wear Analysis
- Sports Dynamics and Biomechanics
- Fatigue and fracture mechanics
- Asphalt Pavement Performance Evaluation
- Lower Extremity Biomechanics and Pathologies
- Metal and Thin Film Mechanics
- Material Properties and Processing
- Adhesion, Friction, and Surface Interactions
- Additive Manufacturing and 3D Printing Technologies
- High-Velocity Impact and Material Behavior
- Sports injuries and prevention
- Natural Fiber Reinforced Composites
- Sports Performance and Training
- Numerical methods in engineering
- Diamond and Carbon-based Materials Research
- Polymer Nanocomposites and Properties
- Structural Response to Dynamic Loads
- Advanced materials and composites
- Polymer Foaming and Composites
- Infrastructure Maintenance and Monitoring
- Polymer composites and self-healing
- Cellular and Composite Structures
- Innovations in Concrete and Construction Materials
Politecnico di Milano
2014-2024
Villa Melitta
2024
STMicroelectronics (Italy)
2024
In many applications, polymeric foams (such as expanded polystyrene or polypropylene) are used for protection from impacts. Standard design requires the foam to maximize energy absorption, thus achieving large deformations (typically up 25% and above in compression) while maintaining stress level below a threshold value. this work, steam chest-moulded EPS EPP were characterized relation their density, microstructure applied strain rate. Typical mechanical parameters (elastic moduli plateau...
Abstract In polyjet printing photopolymer droplets are deposited on a build tray, leveled off by roller and cured UV light. This technique is attractive to fabricate heterogeneous architectures combining compliant stiff constituents. Considering the layer-by-layer nature, interfaces between different photopolymers can be formed either before or after curing. We analyzed properties of in 3D printed composites experiments with computer simulations. To investigate blending, we characterized...
In this study a robust strategy for 3D-Volume Digital Image Correlation (DIC) is presented, apt to provide accurate kinematic measurements within loaded sample on the basis of three-dimensional digital images by X-ray computed micro-tomography.
Abstract Physical aging refers to relaxation of the polymer glassy state toward amorphous and this phenomenon affects their physical‐mechanical properties. This work investigates effect physical on scratch behavior visibility. It was shown that mechanical properties were significantly modified over time, especially yield stress, in turn affecting behavior. As a matter fact, critical load for onset visibility increase with aging, thus improving sensitivity scratches. Such strictly related...
ABSTRACT For a proper preservation of plastics objects, it is essential to study the degradation processes involved in both exposed and hidden areas polymeric materials. In fact, surface properties can differ significantly from bulk have strong effect on artistic perception correct conservation strategy. this work, multi‐analytical investigation, including spectroscopic techniques, optical, electronic microscopic observations mechanical tests, was carried out deeply investigate changes...
Bike and ski helmets are mainly made up of two layers: the external shell foam liner. The liner, typically expanded polystyrene (EPS) or polypropylene (EPP), is asked to provide energy absorption in case impacts. Standard helmet design requires maximize this absorption, thus achieving large deformations (up 25% compression) while maintaining stress level below a threshold value. To optimize construction terms composition, structure density, reliable numerical models required, which turn need...
High-density polyethylene (HDPE) can be blow-molded and used for the production of bottles aggressive products. These products interact both chemically physically with polymer constituting these containers, leading to a decrease in performance material undermining structural integrity component. A fracture mechanics approach was adopted evaluate Environmental Stress Cracking Resistance (ESCR) two HDPE commercial grades bleach containers; different solutions, without sodium hypochlorite (the...
Abstract A finite element model has been used to study the sintering process of polytetrafluoroethylene (PTFE) cylinders in order predict residual thermal stresses; both solid (rods) and hollow (billets) blocks were studied. The simulation was performed considering three separate stages: thermal, deformation, stress analysis. For each stage, relevant material properties determined experimentally. In particular, deformation behavior PTFE thoroughly investigated by means thermo‐mechanical...