Amongst various intermetallic shape memory alloys (SMAs), nickel–titanium-based SMAs (NiTi) are known for their unique elastocaloric property. This widely used remembering material demonstrates excellent mechanical and electrical properties with superior corrosion resistance super-long fatigue life. The straight-drawn wire form of NiTi has a maximum restorable strain limit ~4%. However, linear ...

This paper investigates the replacement of a conventional steel coil spring with composite disc aim minimizing its weight. Simulation in CAD system Siemens NX 12 was used to determine spring’s behavior. The regression functions were stated based on numerical simulation. Based solution minimum weight found using software programmed Matlab. prototype discs manufactured from carbon fibre pre...

Long flexible polymers undergo a coil to stretch transition (CST) in an elongational flow. Near the CST, a peak can be observed in the fluctuations of the size of a molecule (|R|). Solvent effects on the fluctuations are studied using Brownian dynamics simulations of a nonlinear spring force relation that can represent real molecules. Ignoring the influence of hydrodynamic interactions, a linea...

Blocks-in-Conduit is a novel approach to cable, coil, and splice technologies with unique benefits for high-current-density toroid winding operate at 20 T K. Blocks of REBCO tape are cabled in conduit, laminated structure thin-wall center-tube that provides twist along the spring-loaded stress management within cross-flow cooling throughout thick winding. The coil technology utilizes co-wound a...

We present an analytical and experimental study of a torsional magnetic spring where the restoring torque results from field interactions between rotating fixed permanent magnets (PMs). The cylindrical PM, called rotor, is supported on ball bearings two magnets, stators. Perturbing rotor its equilibrium angle induces whose effect ressembles spring. Along with this effect, dissipation mechanisms...

As crucial parts of various engineering systems, solenoid valves (SVs) operated by electromagnetic (EMS) are great importance and their failure may lead to cause unexpected casualties. This failure, characterized a degradation the performances SVs, could be due fluctuations in EMS parameters. These essentially attributed changes spring constant, coefficient friction, inductance, resistance coil...