In vacuum assisted resin transfer molding (VARTM) process, fiber preform defects result very often from inappropriate placement at edge regions when the fiber preform has three-dimensional shape. The unintentional permeability variation is difficult to detect by viewing through the transparent vacuum bag. In this paper, a method was proposed for detecting the local permeability variation of the...

Abstract: The boundary value problems involving contact are of the great importance in industries related to mechanical and materials engineering. These mixed problems are challenging since a priori unknown deformed surface of the material contacting a rigid indenter is to be determined as a part of the solution. Anisotropic solids represent an important class of engineering materials including...

A computational code based on a semianalytic procedure for the determination of characteristic exponents and singular stress displacement fields in multi-material corners is developed. Linear elastic anisotropic materials under generalized plane strain state are considered. This universal tool able to analyze both open closed (periodic) corners, composed one or multiple with isotropic, transver...

Abstract Starting from a Cosserat-type model for curved rods, we derive analytical expressions the effective stiffness coefficients of multilayered composite beams with an arbitrary number layers. For this purpose, employ comparison solutions some bending, torsion, and extension problems three-dimensional rods. The layers beam consist different orthotropic or isotropic non-homogeneous elastic m...

Electro-magneto-thermo-elastic response of a thick double-layered cylinder made from a homogeneous interlayer and a functionally graded piezoelectric material (FGPM) outer layer is investigated. Material properties of the FGPM layer vary along radius based on the power law distribution. The vessel is subjected to an internal pressure, an induced electric potential, a uniform magnetic field and ...

Bone adaptation algorithms that predict the relationship between bone loads and density assume that bone is effectively isotropic. The isotropic assumption cannot explain bone anisotropy and directionality, which are evident from the trabecular architecture. We have modeled the trabecular bone in the proximal femur as effectively orthotropic. Instead of determining the density distribution, we ...

An experimental study of the stress distribution around holes in orthotropic composite laminates has been conducted using thermoelastic stress analysis (TSA). Quantitative thermoelastic studies of stress concentrations in metallic plates is a straightforward matter, all that is required is the ratio of the response from the hole and a far-field reading. For orthotropic materials the situation i...

Buckling and vibrational behaviour of non-homogeneous orthotropic rectangular plates of variable thickness having two opposite edges (y = 0 and b) simply supported and these are subjected to constant in-plane force have been analyzed on the basis of classical plate theory. The other two edges (x = 0 and a) may be clamped, simply supported or free. For nonhomogeneity of the plate material, Young...

Theproblemofpiezoelectric laminateswith speciŽ ed surface tractions and surface and internal electric potentials is studied. By writing the governing equations in the state-space formulation, employing an asymptotic expansion technique, and expressing electric displacement jumps across internal electrodes in terms of basic unknowns, the three-dimensional problem is reduced to a hierarchy of two...