1 ABSTRACT ____ An experimental study was undertaken to establish the viscoelastic behavior of IM7/K3B composite in compression at elevated temperature. Creep compliance, strain recovery and the effects of physical aging on the time dependent response was measured for uniaxial loading at several isothermal conditions below the glass transition temperature (T g). The IM7/K3B composite is a graph...

The generation of a high density twins few tens nanometers in size can enhance both strength and ductility. present work aims to produce highly twinned microstructure Cu-6wt% Zn alloy moderate stacking fault energy (SFE) by equal channel angular pressing (ECAP) using die with angles ϕ=110° Ψ=0. X ray diffraction (XRD) shows that defects is stored up 2 passes then recovery takes place. EBSD imag...

The focus of this paper was directed towards investigating the influence multiple freeze–thaw (FT) cycles on mechanical behaviors an expansive soil under a wide range confining stresses (σc) from 0 to 300 kPa. Consolidated undrained (CU) shear tests with pore pressure measurement (σc = 10–300 kPa) and unconfined compression (UC) were conducted FT impact specimens derive shearing stress–strain r...

In order to study the metadynamic recrystallization behavior of 34CrNi3MoV steel, a double-pass isothermal compression experiment and single-pass thermal interval were designed conducted obtain stress–strain curves under different deformation conditions explore action law parameters during process. The softening rate was calculated by compensation method, grain size in region measured. Based on...

Poly-Carbonate (PC) and Poly-Methyl-Methacrylate (PMMA) are lightweight and mechanically tough transparent glassy polymers. Their mechanical behavior at low to moderate strain rates has been well characterized; however, that at high strain rates needs additional work. We propose two modifications to existing pressure-dependent viscoplastic constitutive equations that enable one to simulate bett...

The deformation and fracture characterization of an Mg−2Sn−1Ca alloy were studied through uniaxial isothermal compression tests. flow stress curves, the efficiency power dissipation, instability parameter behavior under condition various hot working parameters investigated according to experimental data. Processing maps established by superimposing map over dissipation map. It was found that re...

Bonded brickwork as loadbearing walls is widely found in the heritage structures worldwide. The bonded consists of two or more bricks thickness direction which causes them to behave differently single leaf are basis masonry design guide-lines. evaluation under dynamic seismic actions therefore requires appropriate numerical modelling techniques accounting for cyclic loading. Sub-sequently, a si...

The present study aimed at characterizing the flow characteristics and workability of an as-extruded magnesium alloy ZK61 by isothermal compression tests performed temperatures 523–673 K strain rates 0.001–1s?1. stress curves were analysed via considering mechanism microstructure evolution. Using obtained data, both conventional improved Arrhenius constitutive equations developed to predict cha...

A reliable constitutive model is a prerequisite to simulate new complex forming technique, which represented by the near-net shape forging process of aluminum wheels in this study. The aim present work was identify physical-based parameters Al-Zn-Mg alloy via inverse analysis method based on experimental data and numerical analysis: stress–strain curves at different temperatures strain rates we...