نتایج جستجو برای: stiffened shell

تعداد نتایج: 53520  

Journal: :Structural and Multidisciplinary Optimization 2021

Stiffened plates are widely used in aerospace structures as load-bearing components. In order to obtain a novel design of stiffened with excellent performance, generative method (GDMSP) based on the homogenization is proposed this paper, which optimizes stiffener layout an equivalent model. Then, detailed model can then be obtained by extracting path from discrete distribution angles. Moreover,...

Journal: :Facta Universitatis 2022

Several stiffened plates arrangements subjected to bending were configured applying the Constructal Design Method (CDM) and solved by Finite Element (FEM), aiming through Exhaustive Search (ES) technique analyze influence of transverse I-Shaped or T-Shaped stiffeners in mechanical behavior. Considering a non-stiffened plate as reference maintaining total steel volume constant, portion was deduc...

1999
M. Payami

In the framework of spherical geometry for jellium and local spin density approximation, we have obtained the equilibrium rs values, r̄s(N, ζ), of neutral and singly ionized “generic” N -electron clusters for their various spin polarizations, ζ. Our results reveal that r̄s(N, ζ) as a function of ζ behaves differently depending on whether N corresponds to a closed-shell or an openshell cluster. Th...

Journal: :journal of agricultural science and technology 2010
j. pourreza n. nili m. a. edriss

this experiment was carried out to study the effect of sodium chloride from drinking water and feed intake on the quality of egs from laying hens. four hundred and twenty native and white leghorn laying hens ranging from 36 to 43 weeks of age were used. seven experimental treatments containing different levels of salt supplied by feed and/or drinking water were compared. increasing salt int...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1390

در این رساله، ما ثابت جفت شدگی رأس مزونی ds0dk را با استفاده از قانون جمعqcd سه-نقطه، برای دو حالت d و k off-shell، بدست می آوریم. مزون ds0 پهنای واپاشی کمی دارد. پهنای کم این مزون تعجب آور نیست، زیرا جرم آن کمتر از جرم آستانه سیستم dk می باشد. داشتن ثابت جفت شدگی رأس ds0dk ، مهم است، به این دلیل که پهنای واپاشی در این کانال،که مهمترین کانال است، می تواند پهنای کلی حالت را به ما بدهد. بنابراین ...

2013
F. R. S. da Cunha T. Wille R. Degenhardt M. Sinapius C. de Araújo

This work presents the robustness assessment of stiffened thin-walled composite structures in postbuckling, which is based on a new design strategy that satisfies weight, load-based performance and energy-based robustness requirements. In this approach, robustness is understood as collapse insensitivity due a local failure, where global buckling for instance is assumed as a local failure, once ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور مرکز - دانشکده شیمی 1391

dendrimer synthesis strategies now provide virtual control of macromolecular nanostructures as a function of size and surface/interior functionality. these strategies involve the covalent assembly of hierarchical components reactive monomers , branch cells or dendron’s around atomic or molecular cores according to divergent/convergent dendrite branching principles.combinon of two or more dendri...

Journal: :caspian journal of environmental sciences 2005
s.c. kochi b.b. kaliwal

topical application with 100, 200 and 300 ng/ml phytohormone salicyclic acid on commercial traits was analysed in bivoltine csr2, csr4 and csr2xcsr4 crossbreed races of the silkworm, bombyx mori l. the results showed that there was significant increase in larval weight female cocoon weight, male cocoon shell weight, and hatching percentage with 100 and 200 ng/ml, silkgland weight, female cocoon...

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