نتایج جستجو برای: plane structure

تعداد نتایج: 1660304  

Journal: :journal of solid mechanics 0
a ehsani department of mechanical engineering, ferdowsi university of mashhad, mashhad, iran j rezaeepazhand department of mechanical engineering, faculty of engineering, ferdowsi university of mashhad, mashhad,iran.

the present paper investigates the advantages of a new class of composite grid structures over conventional grids. thus far, a known grid structure such as orthogrid or isogrid has been used as an orthotropic layer with at most in-plane anisotropy. the present laminated grid is composed of various numbers of thin composite grid layers. the stiffness of the structure can be adjusted by choosing ...

Journal: :journal of nanostructures 2012
t. hosseinabad g. nabiyouni k. hedayati

co-fe films were electrodeposited on cu substrate from electrolytes with different co concentration  levels. x-ray diffraction (xrd) was used  to  investigate  the  films  crystal  structures. the  results  indicate that  if  the  co  concentration  is  less  that  the  fe  concentration,  the cubic  structure  appears  in  the  films, while  the  hexagonal  structure dominates when  the co  co...

In this research, we have studied the photonic band structure, optical properties and thermal emission spectrum of 2D Silicon photonic crystal with hexagonal structure. The band structure, band gap map and the gap size versus radius have been calculated by plane wave expansion method. The maximum band gap size of TE (TM) polarization and the complete gap size are 51% (20%) and 17% at air hole r...

Journal: :Proceedings of the National Academy of Sciences 1927

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