نتایج جستجو برای: mechanical stability

تعداد نتایج: 524892  

Journal: :علوم کاربردی و محاسباتی در مکانیک 0
موسی رضائی ناصر شرفخانی عطا ا... چیت ساز خویی

in previous researches, mechanical behavior of a microgripper with homogenous and the same material has been studied. in this paper considering the desired characteristics of fgms, as a good thermal and wear resistance, the mechanical behavior of fgm microgripper under dc voltage and temperature variations is investigated. it is assumed that the two microbeams of the fgm microgripper are mounte...

Journal: :the iranian journal of pharmaceutical research 0
n. vishal gupta department of pharmaceutics, jss college of pharmacy, jss university, sri shivarathreeshwara nagar, mysore-570 015, karnataka, india. h.g. shivakumar department of pharmaceutics, jss college of pharmacy, jss university, sri shivarathreeshwara nagar, mysore-570 015, karnataka, india.

the objective of the present study is to develop and investigate the swelling behavior of ph-sensitive superporous hydrogel (sph) and sph composite (sphc). a novel superporous hydrogel containing poly (methacrylic acid-co-acrylamide) was synthesized from methacrylic acid and acrylamide through the aqueous solution polymerization, using n,n-methylenebisacrylamide as a crosslinker and ammonium pe...

Journal: :iranian chemical communication 2016
shahryar pashaei soleyman hosseinzadeh

this study focuses on achieving high stiffness/strength and good fr characteristic of nylon 66/mca/nc nanocomposites, prepared via melt compounding by twin screw extruder. a synergistic effect of flame retardant systems based on melamine cyanurate and zinc borate on the flammability and mechanical behaviours of crysnanoclay reinforced nylon 66 nanocomposites have been reported. mechanical test ...

2006
Y. K. Hong

The thermal and mechanical stability of self-assembled MOEMS components consisting of 3D mirrors have been evaluated. The thermal–mechanical constants of the hinge material (AZ4562 photoresist) used to power the surface tension self-assembly process have been measured and used to predict the stability of assemblies. The Young’s moduli and thermal expansion coefficients showed constant values of...

2007
Sean P. Ng Jane Clarke

Steered molecular dynamics simulations have previously been used to investigate the mechanical properties of the extracellular matrix protein fibronectin. The simulations suggest that the mechanical stability of the tenth type III domain from fibronectin (FNfn10) is largely determined by a number of critical hydrogen bonds in the peripheral strands. Interestingly, the simulations predict that l...

Journal: :علوم و تکنولوژی پلیمر 0
مرتضی سلطانی دهقان ناصر شریفی سنجانی

phenolic resins have been widely used for selective high technology applications due to their excellent ablative properties, structural integrity and thermal stability that make them appropriate for thermal insulation materials, wood products industry, coatings, moulding compounds and composite materials. polymer layered silicate nanocomposites based on montmorillonite (mmt) have attracted a gr...

Journal: :international journal of preventive medicine 0

background: over the years, various types of orthoses have been designed to assist subjects with spinal cord injury (sci) to stand and walk. however, the functional performance of the orthoses has not been adequate, that is, patients experience stability problems, consume excessive energy during ambulation, and generally require assistance in donning and doffing the devices. this research is ai...

Journal: :Water research 2005
Manuel Simões Maria Olivia Pereira Maria João Vieira

In this study a methodology was applied in order to ascertain the mechanical stability of biofilms, by using a stainless-steel (SS) rotating device immersed in a biological reactor where biofilms formed by Pseudomonas fluorescens were allowed to grow for 7 days at a Reynolds number of agitation of 2400. The biofilms developed with this system were characterised in terms of amount of total, extr...

The effects of mechanochemical treatment of monoclinic zirconia in high energy planetary ball mill on its phase transformation were investigated. The mechanical treatment in ball mill reduces the grain size, increases microstrain, and causes phase transition to metastable nanostructured tetragonal and cubic phases. XRD and TEM results show considerable amounts of amorphous phase during ball mil...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده علوم 1391

in this thesis, we consider a mathematical model of cancer with completely unknown parameters. we study the stability of critical points which are biologically admissible. then we consider a control on the system and introduce situations at which solutions are attracted to critical points and so the cancer disease has auto healing. the lyapunov stability method is used for estimating the un...

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