نتایج جستجو برای: fe loading

تعداد نتایج: 153875  

2013
H. M. Gustafson P. A. Cripton

Finite element (FE) models of the spine are typically validated to be similar to the average experimental response of specimens with anatomical variation, such as varying sizes and degrees of degeneration. To account for this variation in a manner that allows validation against a specific vertebral response instead of an average range, specimen-specific models can be developed. The purpose of t...

2013
Atheel Hassan Alwash Ahmad Zuhairi Abdullah Norli Ismail

The Zeolite Y as a support was modified by the incorporating of Fe and TiO2 in one single step using impregnation method. The synergistic effects between those components enhance the catalytic activity for the degradation of amaranth dye under ultrasonic irradiation with output power of 50 W and 40 kHz frequency. Different characterization techniques were used to elucidate the physical and chem...

In the present study, a nanoporous metal organic framework (MOF) based on iron metal and amino terephthalate ligand MIL-101-NH2-Fe has been used as a carrier for loading and in vitro release of 5-flurouracil (5-FU) anticancer drug. The 5-FU drug loaded MOF was 13 wt % by using thermogravimetric analysis (TGA). The 5-FU release was monitored under physiological condition at 37°C, pH 7.4 in simul...

Journal: :Journal of spinal disorders & techniques 2004
K K Lee E C Teo

OBJECTIVE A three-dimensional poroelastic finite element (FE) L2-L3 model was developed to study lumbar spinal instability and intrinsic parameters in the intervertebral disc (IVD). METHODS The FE model took into consideration poroelasticity of the IVD and viscoelasticity of the annulus fibers and ligaments to predict the time-dependent behavior. To simulate a holding task, the motion segment...

2013
Magdalena Kopernik Andrzej Milenin

This paper examines the blood chamber of a left ventricular assist device (LVAD) under static loading conditions and standard operating temperatures. The LVAD’s walls are made of a temperature-sensitive polymer (ChronoFlex C 55D) and are covered with a titanium nitride (TiN) nano-coating (deposited by laser ablation) to improve their haemocompatibility. A loss of cohesion may be observed near t...

Journal: :BioMedical Engineering OnLine 2009
Bernd-Arno Behrens Ingo Nolte Patrick Wefstaedt Christina Stukenborg-Colsman Anas Bouguecha

BACKGROUND There are several numerical investigations on bone remodelling after total hip arthroplasty (THA) on the basis of the finite element analysis (FEA). For such computations certain boundary conditions have to be defined. The authors chose a maximum of three static load situations, usually taken from the gait cycle because this is the most frequent dynamic activity of a patient after TH...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2009
Leen Lenaerts G Harry van Lenthe

Preventing femoral fractures is an important goal in osteoporosis research. In order to evaluate a person's fracture risk and to quantify response to treatment, bone competence is best assessed by bone strength. Finite-element (FE) modelling based on medical imaging is considered a very promising technique for the assessment of in vivo femoral bone strength. Over the past decades, a number of d...

Journal: :Metallomics : integrated biometal science 2011
C Derrick Quarles K Manoj Randunu Julia L Brumaghim R Kenneth Marcus

The analysis of metal-binding proteins requires careful sample manipulation to ensure that the metal-protein complex remains in its native state and the metal retention is preserved during sample preparation or analysis. Chemical analysis for the metal content in proteins typically involves some type of liquid chromatography/electrophoresis separation step coupled with an atomic (i.e., inductiv...

2012
M. Sadighi H. Pouriayevali

This paper deals with analysis of flexural stiffness, indentation and their energies in three point loading of sandwich beams with composite faces from Eglass/epoxy and cores from Polyurethane or PVC. Energy is consumed in three stages of indentation in laminated beam, indentation of sandwich beam and bending of sandwich beam. Theory of elasticity is chosen to present equations for indentation ...

2009
H. van Lenthe

Preventing femoral fractures is an important goal in osteoporosis research. In order to evaluate a person’s fracture risk and to quantify response to treatment, bone competence is best assessed by bone strength. Finite-element (FE) modelling based on medical imaging is considered a very promising technique for the assessment of in vivo femoral bone strength. Over the past decades, a number of d...

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