In Nature, there are a large range of tough, strong, lightweight and multifunctional structures that can be an inspiration to better performing materials. This work presents review found in from biological ceramics composites, polymers cellular materials, elastomers functional their main toughening mechanisms, envisaging potential mimicking approaches applied advanced continuous fibre reinforced polymer (FRP) composite structures. For this, the most common engineering manufacturing processes...

Abstract This paper describes a new interleaving methodology to improve composite laminates' low velocity impact (LVI) damage resistance. The approach relies on analyzing interlaminar stress in conventional aircraft laminate determine the appropriate strategy. A model was built identify larges stress, and two strategies were defined, normal shear stress. Four thin veils used validate strategies. Non‐ interleaved laminates submitted LVI tests at 13.5, 25 40 (J) of energy. Despite revealed an...

The exponential demand for real-time monitoring applications has altered the course of sensor development, from electronics miniaturization, e.g., resorting to printing techniques, low-cost, flexible and functional wearable materials. Humidity sensing been used in prevention diagnosis medical conditions, as well assessment physical comfort. This paper presents a resistive humidity composed silver interdigitated electrodes (IDTs) screen printed onto polyimide film an active layer multiwall...

Three novel Bouligand inspired composites were produced by vacuum bag infusion manufacturing process and their quasi-static mechanical performance compared to a conventional aircraft laminate. A morphologic/physical study was first conducted for all configurations response under tensile, three-point bending (3-PB) interlaminar shear strength (ILSS) tests then evaluated discussed. No significant number of voids detected into laminates, however, rough poor defined region observed in both...

α-Synuclein (SNCA) is a presynaptic protein that associated with the pathophysiology of synucleinopathies, including Parkinson's disease. SNCA naturally aggregation-prone protein, which may be degraded by ubiquitin-proteasome system (UPS) and lysosomal degradation pathways. Besides being target proteolytic systems, can also alter function these pathways further, contributing to progression neurodegeneration. Deterioration UPS autophagy activities aging further aggravates this toxic cycle....

Abstract This work proposes three Bouligand‐inspired layups to enhance low velocity impact (LVI) damage resistance and tolerance of convectional aircraft composite laminates. Two Bouligand‐like (HL HL_S) one hybrid design layup, merging conventional Bouligand architecture (HYB), were produced by vacuum bag infusion. Their performance under LVI, at 13.5, 25 40 (J), compression after (CAI) tests evaluated compared with a multidirectional layup (LS) identical conditions. Results demonstrated...

Carbon nanotubes (CNTs) are one of the most promising materials in sensing applications due to their electrical and mechanical properties. This paper presents a comparative study between CNT Buckypaper (BP) aligned CNT-based strain sensors. The Buckypapers were produced by vacuum filtration commercial CNTs dispersed two different solvents, N,N-Dimethylformamide (DMF) ethanol, forming freestanding sheets, which cut 10 × mm squares transferred polyimide (PI) films. morphology BP was...

The demand for high–strength castings at competitive prices, applications where the ratio strength/unit mass is a critical factor, such as automotive and aeronautics, has increased exponentially. Among aluminum casting alloys stand out Al-Si (with or without Cu and/or Mg additions), which represent 80% of alloys. One microstructural parameters that most influence properties morphology (volume fraction, size, shape distribution) eutectic silicon. modification can be obtained by chemical...

This paper presents a proof of concept an aligned carbon nanotube (CNT) based strain sensor tested on the surface conventional aeronautic laminate. Two type sensors were produced, S and T, in which CNT alignment was parallel (Y) transversal (X) to direction, respectively. Their electrical resistance response thoroughly evaluated during cyclic tensile tests. Despite some disparities relative behavior specific cycles, probably due one-off interferences conductive mechanism, obtained gauge...