In cylindrical continua, hoop stresses are induced due to the circumferential failure. This mainly happens when the cylinder is subjected to mechanical loads which vary in the circumferential directions. On the other hand, radial stress is stress in the direction of or opposite to the central axis of a cylindrical body. In the present study, the influence of curvilinear anisotropy on the radial...

In this paper, a method based on a combination of an optimization of directions of orthotropy, along with topology optimization, is applied to continuum orthotropic solids with the objective of minimizing their compliance. The spatial discretization algorithm is the so called Meshless Local Petrov-Galerkin (MLPG) “mixed collocation” method for the design domain, and the material-orthotropy orie...

This paper deals with the problem of design of composite laminates having zero thermal and hygral expansion and/or curvatures coefficients in one or two directions. The problem is stated as a typical non linear optimization problem in the framework of the polar-genetic approach: the formulation is a function of the laminate polar parameters for the representation of tensor quantities, and a gen...

Elastic waves in materials with cylindrical orthotropy are considered, this being a plausible model for waves in wood. For time-harmonic motions, the problem is reduced to some coupled ordinary differential equations. Methods for solving these equations are discussed. These include the method of Frobenius (power-series exapansions) and the use of Neumann series (expansions in series of Bessel f...

Elastic anisotropy exhibits spatial inhomogeneity in human cortical bone, but the structural origins of anatomic variation are not well understood. In this study, the elastic anisotropy of human cortical bone was predicted using a specimen-specific multiscale model that investigated the relative influence of apatite crystal orientations and intracortical porosity. The elastic anisotropy of cort...

A comprehensive study on the influence of planar fourth-order fiber orientation tensors effective linear elastic stiffnesses predicted by averaging mean field homogenization is given. Fiber states sheet molding compound (SMC) are identified to be in most cases approximately planar. In case, all possible given a minimal invariant set structurally differing tensors. This defines three-dimensional...

we present observation of polar coronal hole plumes with foot point jets that shows evidence of longitudinal acceleration. the series of event, occurring in the north coronal hole on 10 july 2010, was observed by the aia telescopes of the solar dynamic observatory (sdo mission) in the euv lines, with unprecedented details. the structures along the plume show a propagating outward velocity of ab...