Abstract In this paper, a numerical strategy based on the combination of kriging approach and Polynomial Chaos Expansion (PCE) is proposed for prediction buckling loads due to random geometric imperfections fluctuations in material properties mechanical system. The original computational applied beam simply supported at both ends by rigid supports one punctual spring whose location stiffness va...

In the present work the structural behaviour of a mandible with a dental implant, considering a unilateral occlusion, is numerically analysed by means of the Finite Element Method (FEM) and the Boundary Element Method (BEM). The mandible, whose CAD model was obtained by computer tomography scans, is considered as completely edentulous and only modelled in the zone surrounding the implant. The m...

Over the course of a life time, as a result of adaptive mechanobiological processes (e.g. ageing), or the action of external physical factors such as mechanical loading, the human skin is subjected to, and hosts complex biophysical processes. These phenomena typically operate through a complex interplay, that, ultimately, is responsible for the evolutive geometrical characteristics of the skin ...

Bistable deployable scissor structures (BDS) are interesting solutions for temporary civil engineering having the requirement of rapid erection and use. The transformation design BDS have been studied in various works literature using numerical simulations based on a quasi-static loading assumption. In contrast, their dynamic behavior factors influencing it not yet extensively investigated. Thi...

With the exploitation of offshore oil and gas gradually moving to deep water, higher temperature differences and pressure differences are applied to the pipeline system, making the global buckling of the pipeline more serious. For unburied deep-water pipelines, the lateral buckling is the major buckling form. The initial imperfections widely exist in the pipeline system due to manufacture defec...

Like other structures, shallow domes have imperfections from the prescribed values obtained by specifications during the construction process. Specifications define some tolerance values for imperfections. Despite consideration of these values, the critical load of a dome varies for each imperfection pattern. So the reliability plays an important role in domes safety. Theoretical evaluation pro...

Abstract Arches are one of the predominant structural elements for bridges with big spans. With current technological advancement, they applicable in pure form, without any transverse stabilizing systems. The slender form arch leads to reduction their capacity due stability failure. Their behaviour is directly related presence first and second order effects – imperfections deformed state. typic...

Ferromagnetic resonance experiment was performed to study the magnonic modes of an antidot lattice nanopatterned in a sputtered Co 2 MnSi Heusler alloy thin film. The crystal prepared with Ga + focused ion beam, and micromagnetic simulations were used explain qualitatively quantitatively complex experimental spin waves spectrum. We demonstrate necessity consider geometrical imperfections modifi...

The present work investigates the elasto-visco-plastic buckling of thick plate structures. Methods to estimate thin shells and plates are proposed in literature. To knowledge authors, only few works experimental results, none treat plate. Thick rectangular chosen as a structure interest study buckling. A modelling/experimental approach is followed solve such problem. Buckling experiments at roo...

In this paper sensitivity analysis of a wideband backward-wave directional coupler due to fabrication imperfections is done using Monte Carlo method. For using this method, a random stochastic process with Gaussian distribution by 0 average and 0.1 standard deviation is added to the different geometrical parameters of the coupler and the frequency response of the coupler is estimated. The appli...