background petroleum hydrocarbons are mix compounds and divided into four groups: saturates, aromatics, resins and asphalten. among various phases of crude-oil, the alkanes with medium length chain are favorable substrates that rapidly degraded, although short-chain alkanes are very toxic and long-chain alkanes have low solubility in water that reduce its bioavailability and make resistant to b...

In this study, we investigate the stress-strain curves of reactive powder concrete (RPC) at high strain rates by using SHPB test, the Burgers’ mechanics model and secant-moduli method. The RPC composites are examined at the age of 10 days containing RPC mortar as the matrix, and three volume concentrations, 1%, 2% and 3%, of steel fiber as the inclusion respectively. Strain rates including 1×10...

This paper presents the results of study dynamic impact behaviour AA2124-SiC Metal Matrix Composite (MMC) material with different particle reinforcement sizes and qualities using a compressive Split-Hopkinson Pressure Bar (SHPB) apparatus. Mechanical tests were performed at strain rates 1000 s?1, 2000 3000 s?1 temperatures room temperature (25 °C), 100 °C 200 °C. Microstructural analyses carrie...

The effects of elevated temperature at high strain rate a commercial tungsten alloy were investigated. tests carried-out strainrate (from 850 to 2200 1/s) by means Split Hopkinson Tension Bar device on round specimens having diameter and gauge length 2mm 5 mm, respectively. thermal conditions obtained water-cooled induction heating system the specimen mounted SHTB. dependence ultimate tensile s...

While nanocomposite electromechanical sensors are expected to display reasonable conductivity and high sensitivity, little consideration is given eliminating hysteresis strain rate/frequency dependence from their response. For example, while G-putty, a composite of graphene polysiloxane, has very its extreme viscoelasticity renders it completely unsuitable for real due hysteretic rate-/frequenc...