نتایج جستجو برای: apparent modulus of elasticity

تعداد نتایج: 21168990  

Journal: :Journal of the Ceramic Association, Japan 1939

Javad Jafari Fesharaki, Sa’id Golabi Seyed Ghasem Madani

This research develops thermo-elastic analysis of a functionally graded cylinder under thermo-mechanical loadings. Heat conduction equation in cylindrical coordinate system is solved. Thermal conductivity coefficient is graded along the radial direction. By considering a symmetric distribution of temperature, loading and boundary conditions, strain-displacement and stress-strain relations can b...

Journal: :journal of sciences, islamic republic of iran 2014
m. hashemi gahruei

nanocomposites made of carbon nanotube (cnt) bundles have attracted researchers’ attention due to their unusual properties such as: light weight, flexibility and stiffness.  in this paper, the effects of straight and rope-shaped bundles on nanocomposite effective mechanical properties are investigated.  first, fea models are created consisting of cnts with different shapes of straight and rope-...

EFTEKHARI-YEKTA B., , MARGHUSSIAN V.K., ,

The effect of precipitation of ?.qss. and gahnite phases during heat treatment of glass frits in the ZnO-Al2O3-SiO2 system on the mechanical property of resulting glass-ceramic specimens were investigated. It was shown that gahnite glass-ceramics had higher bend strength and toughness values than ?.qss. ones. The results are attributed to the higher modulus of elasticity as well as higher therm...

Journal: :Journal of the Ceramic Association, Japan 1938

Journal: :جنگل و فرآورده های چوب 0
مریم قربانی کوکنده استادیار دانشکدة منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران روژین کاکی دانش آموختة کارشناسی ارشد صنایع چوب، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران اصغر امیدوار استاد دانشکدة جنگل داری و فناوری چوب، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران

this research was conducted to study the effects of styrene and methyl methacrylate cell lumen monomers on the mechanical properties and decay resistance of beech wood. mechanical and decay resistance test samples were prepared according to astm d143-94 and din en113 standards and impregnated with five concentration monomer solution 0, 40, 60, 80 and 100 percent using bethell method. treated sa...

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