Yield surfaces of A5052 aluminum alloy sheets with different tempers are modeled by the simplified identification method using circumscribing polygon. In this method, a polygon equal plastic work contour is determined uniaxial tensile, biaxial tensile and plane strain tests. Anisotropic yield sheet Yld2000-2d (Barlat et al., 2003) Yld2004-18p 2005) functions. Both functions can express inscribe...

Shahid Technique’ to help reduce suitable fracture configurations to facilitate ease of the Lag Screw Principle. In oblique fracture configurations, inter fragmentary compression at a fracture site can be achieved using the ‘Lag Screw Principle’. A screw inclination perpendicular to the fracture plane in this configuration allows for optimal compression. If compression is applied at an angle gr...

In this paper, we propose a novel bit-plane slicing based lossy image compression technique in Extended JPEG format which takes less storage space than JPEG format with no visual degradation. One of its main features is to find out and discard those particular bits which are not responsible for the color and texture information of the image, which allows storing the image with less number of bi...

Among the titanium alloys, Ti-6Al-4V is the most widely used. In the present work, the uniaxial hot compressive behavior of Ti-6Al-4V has been investigated under constant strain rates. A series of dilatometery experiments were carried out to determine the transformation temperatures at different cooling rates. Specimens were homogenized at 1050 °C for 10 minutes followed by fast cooling to dif...

The mechanical response of almost pure single-crystal micro-pillars under compression exhibits a highly localized behavior that can endanger the structural stability sample. Recent experiments revealed crystal is very sensitive to both presence quenched disorder in sample, and orientation crystal. In this work, we study influence on large 2-D plane strain FCC with three active glide planes usin...

The theoretical and computational framework of finite deformation mesoscale field dislocation mechanics (MFDM) is used to understand the salient aspects kink-band formation in Cu-Nb nano-metallic laminates (NMLs). A conceptually minimal, plane-strain idealization three-dimensional geometry, including crystalline orientation, additively manufactured NML model NMLs. Importantly, natural jump/inte...

Single compression tests were conducted for two types of pure Al (99.99%): one processed using equal-channel angular pressing (ECAP) through route Bc for 8 passes and the other with the same ECAP but successively annealed at 573K for 1 h. The distributions of the equivalent strain introduced by the compression were quantitatively examined by finite element analysis (FEA). Comparison was made be...

Nanoscale mechanical behavior of kaolinite as a fundamental failure mechanism has been investigated under uniaxial tension and compression using Molecular Dynamics (MD) simulation methods. External deformation applied on with strain rate 5 × 10−7fs−1 for tensile compressive tests in the directions parallel (x-, y-direction)/perpendicular (z-direction) to clay mineral layers. Results showed that...

Multifunctional materials composed of ultrathin magnetic films with perpendicular magnetic anisotropy combined with ferroelectric substrates represent a new approach toward low power, fast, high density spintronics. Here we demonstrate Co/Ni multilayered films with tunable saturation magnetization and perpendicular anisotropy grown directly on ferroelectric PZT [Pb(Zr0.52Ti0.48)O3] substrate pl...

Multi-layer context tree (MCT) modeling has been recently applied for lossless compression of multi-layer map images and showed its efficiency. Though it is not applicable directly to compression of gray-scale images, it could be utilized together with bit-plane separation technique. In this work we evaluated the performance of MCT modeling according to three bit-plane separation methods and co...