In this study, we proposed a new adjacent variable thickness hexagonal tube (AVTHT) and performed crushing analysis crashworthiness optimization under multiple loadings. First, the finite element models were constructed validated by experiments with four configurations of AVTHTs. Then, numerical simulations axial loading oblique loadings indicated that AVTHTs various angles (0°, 10°, 20°, 30°) ...

This study analytically examines internally pressurized power-law functionally graded variable thickness disk. The consideration is applied to the Young's modulus and Poisson's ratio of material as well radial profile variation Under this scheme, solution yields different Bessel functions including first, second, modified types. Stress displacement fields are investigated at elastic limits by o...

Introduction: Real-time TrueFisp cardiac imaging allows multiple slice cine acquisitions within a single breathhold. Typically, the steady state preparation is established utilizing a full heartbeat per slice. Hence, only every other heartbeat is used to collect data. A simple elimination of the preparation heartbeats to increase scan efficiency compromises the contrast between blood and myocar...

An optimization problem for the unilateral contact between a pseudoplate and a rigid obstacle is considered. The variable thickness of the pseudoplate plays the role of a control variable. The cost functional is a regular functional only in the smooth case. The existence of an optimal thickness is verified. The penalized optimal control problem is considered in the general case.

The transport mean free path of microwave radiation in a random sample is determined from measurements of transmission through a composite sample of the medium with unknown scattering characteristics and a random medium of variable thickness and known scattering parameters. The method can be applied at optical frequencies by use of a ceramic wedge as the medium of variable thickness.

BACKGROUND Full-thickness skin graft (FTSG) is a very versatile tool regularly used in small sizes. With the established knowledge of the graft take through the margins as well as wound bed, we extended the use of the FTSG for reconstruction of large-sized defects with satisfactory results.  METHODS We presented our experience in wound reconstruction using FTSG in 28 patients. We select...

BACKGROUND Wall stress calculated using finite element analysis has been used to predict rupture risk of aortic aneurysms. Prior models often assume uniform aortic wall thickness and fusiform geometry. We examined the effects of including local wall thickness, intraluminal thrombus, calcifications, and saccular geometry on peak wall stress (PWS) in finite element analysis of descending thoracic...

in this paper, the effects of carbon nanotube (cnt) orientation and aggregation on the static behavior of functionally graded nanocomposite cylinders reinforced by cnts are investigated based on a mesh-free method. the used nanocomposites are made of the straight cnts that are embedded in an isotropic polymer as matrix. the straight cnts are oriented, randomly or aligned or local aggregated int...

Thermoelastic behavior of temperature-dependent (TD) and independent (TID) functionally graded variable thickness cantilever beam subjected to mechanical and thermal loadings is studied based on shear deformation theory using a semi-analytical method. Loading is composed of a transverse distributed force, a longitudinal distributed temperature field due to steady-state heat conduction from root...

In this research, thermal buckling of thin rectangular plate made of Functionally Graded Materials (FGMs) with linear varying thickness is considered. Material properties are assumed to be graded in the thickness direction according to a simple power law distribution in terms of the volume fractions of the constituents. The supporting condition of all edges of such a plate is simply supported. ...