Plastic structural analysis may be applied without any difficulty and with little effort for member verifications regard to lateral torsional buckling of doubly symmetric rolled I sections. Suchlike analyses can performed based on the plastic zone theory, specifically using finite beam elements seven degrees freedom 2nd order theory considering material nonlinearity. The existing Eurocode enabl...

in this research, the buckling and bending behaviour of smart nanocomposite plate reinforced by single- walled carbon nanotubes (swcnts) under electro-magneto-mechanical loadings is studied. the extended mixture rule approach is used to determine the elastic properties of nanocomposite plate. equilibrium equations of smart nanocomposite plate are derived using the hamilton’s principle based on ...

We evaluated the mechanical properties and torque/force generated during canal shaping by four NiTi files with innovative designs. Each of 52 TruNatomy Prime, XP-endo Shaper, Spring Endo unheated finish (Spring Endo), heated H) were subjected to bending, buckling, cyclic fatigue, torsional resistance tests (n = 10 per file type). Canal was simulated J-shaped resin blocks 10). Phase transformati...

The mechanics of a fascicle insertion into the skin by a mosquito of the type aedes aegypti has been studied experimentally using high-speed video (HSV) imaging, and analytically using a mathematical model. The fascicle is a polymeric microneedle composed of a ductile material, chitin. It has been proposed that the mosquito applies a non-conservative follower force component in addition to the ...

Abstract For the stability assessment of members and structures according to EN 1993‐1‐1 equivalent member method, geometrical nonlinear calculation with imperfections or GMNIA analysis residual stresses can be used alternatively. The second possibility requires a corresponding model for cross‐section resistance. verification lateral torsional buckling, bow e0 out plane are defined, which lead ...

A new model is proposed to explain coiling of myelins composed of fluid bilayers. This model allows the constituent bilayer cylinders of a myelin to be non-coaxial and the bilayer lateral tension to vary from bilayer to bilayer. The calculations show that a myelin would bend or coil to lower its free energy when the bilayer lateral tension is sufficiently large. From a mechanical point of view,...

Individual multiwalled carbon nanotubes with a range of aspect ratios are subjected to cyclic axial compression to large strains using atomic force microscopy. Distinct elastic buckling and post-buckling phenomena are observed reproducibly and are ascribed to Euler, asymmetric shell buckling (i.e., kinking), and symmetric shell buckling. These show agreement with continuum theories that range f...