نتایج جستجو برای: finite element analysis method

تعداد نتایج: 4223412  

2007
Andreas Gömmel Christoph Butenweg Malte Kob

Since fluid-structure interaction within the finite-element method is state of the art in many engineering fields, this method is used in voice analysis. A quasi two-dimensional model of the vocal folds including the ventricular folds is presented. First results of self-sustained vocal fold oscillation are presented and possibilities as well as limitations are discussed.

2004
Pavol Federl Przemyslaw Prusinkiewicz

We present a model of fracture formation on surfaces of bilayered materials. The model makes it possible to synthesize patterns of fractures induced by growth or shrinkage of one layer with respect to another. We use the finite element method (FEM) to obtain numerical solutions. This paper improves the standard FEM with techniques needed to efficiently capture growth and fractures.

Journal: :JSW 2011
Yangjian Xu Daihui Tu Haiyang Du

A finite element model is constructed to analyze the steady heat conduction and thermal stress in a ceramic/FGM/metal composite EFBF plate under convective heat transfer boundary. From numerical calculation, when 1   b a   , T0=Ta =300K and Tb=1 800K, the steady heat conduction and thermal stress distributions in the plate were obtained. The numerical results show that the temperature distr...

Journal: :IJMMME 2013
Eskandari Hadi Nami Mohammad Rahim

The problem of fatigue-crack-growth in a rotating disc at different crack orientation angles is studied by using an automated numerical technique, which calculates the stress intensity factors on the crack front through the three-dimensional finite element method. Paris law is used to develop the fatigue shape of initially semi-elliptical surface crack. Because of needs for the higher mesh dens...

Journal: :J. Computational Applied Mathematics 2017
Aymen Laadhari Gábor Székely

a r t i c l e i n f o Article history: Received 28 March 2016 Received in revised form 18 October 2016 MSC: 35Qxx 65Lxx 65Nxx 65Yxx 76-xx

Journal: :journal of dental research, dental clinics, dental prospects 0
maryam talebi sahar moghimi ferdowsi university of mashhad mina shafagh hadi kalani fatemeh mazhari

background and aims. heat generated within tooth during clinical dentistry can cause thermally induced damage to hard and soft components of the tooth (enamel, dentin and pulp). geometrical characteristics of immature teeth are different from those of mature teeth. the purpose of this experimental and theoretical study was to investigate thermal changes in immature permanent teeth during the us...

Journal: :journal of dentistry, tehran university of medical sciences 0
s. mir mohammad rezaei associate professor, department of prosthodontics, school of dentistry, tehran university of medical h. heidarifar mechanical engineer, private sector f. fallahi arezodar mechanical engineer, private sector a. azary assistant professor, department of prosthodontics, school of dentistry, tehran university of medical s. mokhtarykhoee dentist, private practice

objective: in all ceramic fixed partial dentures the connector area is a common fracture location. the survival time of three-unit fixed partial dentures may be improved by altering the connector design in regions of maximum tension. the purpose of this study was to determine the effect of buccolingual increase of the connector width on the stress distribution in posterior fixed partial denture...

Journal: :journal of dentistry, tehran university of medical sciences 0
allahyar geramy professor, dental research center dentistry research institute, department of orthodontics, tehran university of medical sciences, tehran, iran omid mortezai assistant professor of orthodontics, dental caries prevention research center, qazvin university of medical sciences, qazvin, iran masomeh esmaily assistant professor, department of orthodontics, lorestan university of medical sciences, khorramabad, iran hojat darvishpour postgraduate student, orthodontics department, school of dentistry, tehran university of medical sciences, tehran, iran

o bjectives: headgears are among the effective orthodontic appliances to achieve treatment goals. unilateral molar distal movement is sometimes needed during an orthodontic treat- ment, which can be achieved by an asymmetric headgear. different unilateral headgears have been introduced. the main goal of this study was to analyze the force system of uni- lateral expanded outer bow asymmetric hea...

Journal: :iranian endodontic journal 0
allahyar geramy department of orthodontics, dental school, dental research center, tehran university of medical sciences, tehran, iran mohammad jafar eghbal department of endodontics, iranian center for endodontic research, dental research center, dental school, shahid beheshti university of medical sciences, tehran, iran sara ehsani oral radiologist, dental research center, shahid beheshti university of medical sciences, tehran, iran

introduction: the fracture strength of endodontically treated teeth compared to vital ones has long been a source of controversy. it is not clear how root canal therapy affects the stress distribution in teeth. the purpose of this study was to evaluate the changes in stress distribution after root canal therapy in a human maxillary canine by finite element analysis (fem). materials and methods:...

2007
T. T. Nguyen G. R. Liu K. Y. Dai K. Y. Lam

The paper examines three selective schemes for the smoothed finite element method (SFEM) which was formulated by incorporating a cell-wise strain smoothing operation into the standard compatible finite element method (FEM). These selective SFEM schemes were formulated based on three selective integration FEM schemes with similar properties found between the number of smoothing cells in the SFEM...

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