نتایج جستجو برای: stress finite element method

تعداد نتایج: 2312869  

An elastic finite element analysis was conducted to evaluate the stress distribution in the initiation zone of the adhesive rupture during the 3-point bending test. This test is used to measure the adherence between a polyepoxy adhesive and aluminum alloy with different surface treatments. The purpose is to compare, in the high stress concentration areas, the stress fields calculated using fini...

پایان نامه :دانشگاه بین المللی امام خمینی (ره) - قزوین - دانشکده فنی 1390

در این پایان نامه یک نوع آنتن ویوالدی آنتیپودال متقارن مورد تحلیل، طراحی و شبیه سازی قرار گرفته شده است و نتایج آن از جمله گین ، تلفات برگشتی و قطبی شدگی متقاطع و در نهایت پترن آن در رنج فرکانس 1 تا 20 گیگاهرتز ارائه گردیده است. ابتدا انواع آنتن ویوالدی و روند سیر تکامل آن مورد بررسی قرار گرفته و با توجه به مزایا و کاربردهای آن،یک نوع آنتن ویوالدی دو طرفه متقارن انتخاب شده و مورد تحلیل و بررسی...

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:...

In this study, shear and peel stress distributions in the viscoelastic adhesive layer of a single-lap joint (SLJ) with functionally graded (FG) adherends are investigated. The study focuses on the effect of different adherend profiles and material composition on the time-dependent stress concentration/distribution in balanced and unbalanced SLJs. For this purpose, the Reddy model is applied to ...

1998
G. De Vicente

Three subsequent Tertiary paleostress fields that are deduced from fault-slip data for the eastern part of the Tajo Basin are analyzed by finite-element studies. The modelling results show that maximum horizontal stresses (SHmax) are mainly controlled by the geometry of the model limits and the boundary conditions applied. The models are used to test two hypotheses on the origin of the Altomira...

2013
Kemal Aldaş Faruk Sen

Three-dimensional finite element models are developed to investigate the effects of both tensile load and uniform temperature load on the stresses in hybrid joints. During the solution of the problem, finite element method (FEM) is preferred, as this method is very suitable for solving many engineering problems. An aluminum sheet is bonded a composite sheet. Hybrid joints are designed from both...

2012
H. W. McKENZIE Rajiv Gandhi

13  Abstract-In this study, the wok is carried out to analyzed, the stresses of plate with oblique hole with the Finite Element Analysis. Stress analysis of a series of flat plates with oblique holes subjected to axial tension has been carried out using the finite element method (FEM). Different plate hole diameter-width ratios, angles of hole obliquity have been considered to provide stress c...

2012
Jakob Olofsson

The industrial demand for increased component performance with concurrent reductions in component weight, development times and verifications using physical prototypes drives the need to use the full potential of casting and Finite Element Method (FEM) simulations to correctly predict the mechanical behavior of cast components in service. The mechanical behavior of the component is determined b...

Journal: :international journal of advanced design and manufacturing technology 0
mehdi rezaei farimani hamid ekhteraei toussi

in this paper, we use molecular dynamics and finite element simulations to determine the mechanical properties of single-crystal metal of silver (ag) with nano-holes. the lattice transition method from 3-dimensions into 2-dimentions in molecular dynamics simulation as well as plane stress model in finite element method, is used to lessen the simulation time consuming. elasticity module reductio...

Journal: :journal of dentistry, tehran university of medical sciences 0
mohsen dalband assistant professor, dental research center, department of oral and maxillofacial surgery, faculty of dentistry, hamadan university of medical sciences, hamadan, iran jamal kashani phd in mechanical engineering hadi hashemzehi assistant professor, department of oral and maxillofacial surgery, faculty of dentistry, zahedan university of medical sciences, zahedan, iran

o bjectives: the aim of this study was to investigate the displacement and stress distri- bution during surgically assisted rapid maxillary expansion under different surgical conditions with tooth- and bone-borne devices. materials and methods: three-dimensional (3d) finite element model of a maxilla was constructed and an expansion force of 100 n was applied to the left and right molars and pr...

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