A5075421430- Mechanical Behavior of Composites
- Natural Fiber Reinforced Composites
- Flame retardant materials and properties
- Polymer Nanocomposites and Properties
- Fatigue and fracture mechanics
- Tribology and Wear Analysis
- Ultrasonics and Acoustic Wave Propagation
- Fiber-reinforced polymer composites
- Structural Behavior of Reinforced Concrete
- Structural Health Monitoring Techniques
- Optical measurement and interference techniques
- Material Properties and Applications
- Cellular and Composite Structures
- Structural Response to Dynamic Loads
- Advanced Fiber Optic Sensors
- Thermal Radiation and Cooling Technologies
- Cellular Mechanics and Interactions
- Structural Analysis of Composite Materials
- Supercapacitor Materials and Fabrication
- High-Velocity Impact and Material Behavior
- Advanced MEMS and NEMS Technologies
- Adhesion, Friction, and Surface Interactions
- Additive Manufacturing and 3D Printing Technologies
- Mechanical stress and fatigue analysis
- Graphene and Nanomaterials Applications
Tampere University
2011-2024
Tampere University of Applied Sciences
2016
Adhesively bonded joints are used in many applications which dynamically loaded. Thus, excellent fatigue properties of adhesives, especially under fracture mode II, required. The II testing adhesive is challenging, where the observation crack length complicated. Accordingly, compliance-based effective definitions avoiding direct have been instead. experimental monitoring method using digital image correlation (DIC) studied this work. DIC-based compared to defining length. developed useful...
Layered structure graphene oxide/methylcellulose composite films with excellent mechanical and gas barrier properties were fabricated by a simple solvent evaporation assisted assembly.
The application of natural flax fibre/epoxy composites is growing in the automotive sector due to their good stiffness and damping properties. However, impact damage resistance flax/epoxy limited brittle nature both epoxy fibres strong fibre/matrix adhesion. Here, biobased thermoplastic cellulose acetate (CA) deployed as a fibre treatment alter development subjected low-velocity impact. perforation threshold energy unmodified cross-ply increased respectively by 66% 42% with CA-treated...
The mechanical characteristics of block-shaped samples a number thermally stable thermoplastics for structural applications are investigated over wide range temperatures: from the room temperature (RT) up to 250°C. Together with several commercially available materials, namely, polyetheretherketone, polyphenylene sulfide, and polyetherimide Ultem-1000; polyimide designed at Institute Macromolecular Compounds RAS having both semicrystalline amorphous structures were studied. tribological...
Damage onset and adiabatic heating of a pultruded Glass Fiber-Reinforced Plastic (GFRP) composite was investigated using compression tests at low, intermediate high strain rates (10−3 s−1, 1 s−1 103 s−1). Optical infrared (IR) cameras monitored the specimens during testing, so that mechanical response, damage onset, evolution were obtained along with specimen due to plastic deformation fracture. The results revealed clear rate effects on stiffness, softening initiation. simultaneous optical...
Damages in composite structures are typically repaired using external bonded patches. In this work, the damage tolerance within patches is studied double strap joint (DSJ) with carbon fibre reinforced plastic (CFRP) specimens. The work refers to bond-line manufacturing-related defects such as debond or dry area. Both intact and pre-cracked DSJ specimens numerically analysed experiments for comparisons. specimens' adherends were CFRP laminates AS4/3501–6 plies adhesive film FM 300–2....
Abstract The effect of various fillers on the mechanical, barrier, and flammability properties polypropylene (PP) was studied. PP filled with 4 wt% nano‐sized calcium carbonate, titanium dioxide, organoclay, multiwalled carbon nanotube (MWCNT). For comparison, micron‐sized carbonate also Two‐step masterbatch dilution approach composites suggested no or only minor improvements in Young's modulus tensile yield strength, whereas their ductility decreased compared to coupling agent‐modified...
Film adhesives are a form of composite consisting two constituents i.e. fibrous carrier and matrix. The fracture surfaces usually dominated by the carrier-matrix de-bonding, but it also co-exists with minor failure related to resin closer adhesive–adherend interface. This investigation aims at realistic representation modes. For this, 3D multi-layer approach FM 300-2 adhesive is defined where non-local Continuum Damage Model (CDM) developed accounting for proper matrix mechanism lower...
Titania nanotubes (TNTs) with different morphology and crystal structure are prepared by chemical processing rapid breakdown anodization (RBA) methods. The studied in terms of thermal conductivity. TNTs variable wall thickness below 30 nm have significantly reduced conductivity than bulk titania, due to the phonon confinement, smaller mean free path, enhanced boundary scattering. amorphous (TNTAmor) comparatively thicker walls both crystalline nanotubes. TNTAmor has a 0.98 W m−1 K−1, which...
Sustainable coating solutions that function as a fire retardant for wood are still challenging topic the academic and industrial sectors. In this study, composite coatings of casein protein mixed with mica aluminum trihydroxide (ATH) were tested retardants plywood; degradation retardancy performance assessed cone calorimeter, thermogravimeter was used thermal stability measurement. The results indicated casein–mica composites beneficial coatings. heat release rate (HRR) total released (THR)...
Fracture modes I and II interact in mixed-mode loading conditions, the interaction is typically taken into account using a fracture criterion. In this work, concept for defining criterion developed through an experimental-numerical simulation analysis. The behaviour tested analysed with single specimen design. design of simplifies measurement when complex test arrangements preparations various geometries are excluded practice. Here, detail digital image correlation (DIC). DIC data used...
Specialized polyamide-imide coating on a CuSn10Pb10 substrate, material combination utilized often in modern bearing applications, is fabricated using the solvent casting method. The adhesion studied well-known notched (NCA) test. Conventionally, critical strain required to cause debond propagation determined by visual observation and indirectly linked measured data calculate fracture toughness. Here, digital image correlation (DIC) used systemically study deformations during testing that...
In this study, alternative core materials to commercial cork were searched for. Additionally, aging of new was studied. Bio-based in sandwich structures can be useful for sports equipment, transportation, and furniture with much less impact on the environment comparison their synthetic counterparts. paper, panels made fiber-reinforced polymer (FRP) skins various sustainable a thickness 6 mm The were: cork, expanded polystyrene (EPS), cellulose foam, 3D-printed polylactic acid (PLA) honeycomb...