The earing profile of cylindrical cups is mainly dictated by the in-plane anisotropic behavior metal sheet. Nevertheless, for materials with a strong contact conditions between blank and blank-holder can also affect material flow due to non-uniform distribution forces. main objective this study numerically assess influence friction on cup using AA3104 aluminum alloy. anisotropy r -values leads ...

the buckling analysis of annular composite plates reinforced by carbon nanotubes subjected to compressive and torsional loads are studied in this paper. the mori-tanaka method is employed to calculate the effective elastic modulus of composites having aligned oriented straight cnts. the effects of cnts volume fractions, orientation angles, boundary conditions and geometric ratio of plate are di...

We use a third-order perturbation theory and Melnikov's method to prove the existence of chaos in spinning circular disks subject to a lateral point load. We show that the emergence of transverse homoclinic and heteroclinic points lead, respectively, to a random reversal in the traveling direction of circumferential waves and a random phase shift of magnitude pi for both forward and backward wa...

Spatial encoding using non-bijective, curvilinear magnetic fields [1] has been introduced to overcome present limitations of gradient performance due to safety limitations from peripheral nerve stimulation (PNS). These PatLoc(parallel acquisition technique using localized gradients) fields allow for higher ΔBmax/dt, and therefore faster imaging while staying below the limit of PNS. PatLoc field...

Spinning septins S eptin fi laments in yeast do a right-angled turn in the middle of cell division, according to Alina Vrabioiu and Tim Mitchison (Harvard Medical School, Boston, MA). The fi laments initially align parallel to the spindle axis but then rotate 90° to form two circumferential rings that fl ank the cytokinetic furrow. Septin fi laments help cells divide, but just how they do so ha...

Closed-face shielded TBM driven tunnels are supported using precast concrete segmental linings. In the past these types of lining have been assessed without consideration being given to the coupling action along circumferential joints of adjacent rings or the true behaviour of joints along longitudinal joints, especially where these have a taper. The mechanical and geometrical characteristics o...

In this paper we will present results of several direct numerical simulations of turbulent pipe flow. The highest Reynolds number simulated in this study was 61, 000. Our numerical model uses Fourier expansions in axial and circumferential directions and 6th order staggered compact finite difference in the wall normal direction. Apart form standard turbulent statistics we also will present 1D e...

In this paper, the influence of the elastic foundation on the free vibration and buckling of thin-walled piezoelectric-based functionally graded materials (FGM) cylindrical shells under combined loadings is investigated. The equations of motion are obtained by using the principle of Hamilton and Maxwell's equations and the Navier's type solution used to solve these equations. Material propertie...

Results of electro-thermo-elastic analysis of a functionally graded thick-walled spherical shell made of temperature dependent materials are presented in this article. All material properties are assumed temperature-dependent and also are graded along the thickness direction based on power function. Temperature dependency is accounted for all material properties including, thermal, mechanical a...

To determine the relation between local myofiber anatomy and local deformation in the wall of the left ventricle, both three-dimensional transmural deformation and myofiber orientation were examined in the anterior free wall of seven canine left ventricles. Deformation was measured by imaging columns of implanted radiopaque markers with high-speed, biplane cineradiography (16 mm, 120 frames/sec...