نتایج جستجو برای: finite element model

تعداد نتایج: 2401982  

Journal: :مهندسی مکانیک و ارتعاشات 0
کاظم رضاکاشی زاده دانشجوی دکتری، باشگاه پژوهشگران جوان، واحد سمنان، دانشگاه آزاد اسلامی ، سمنان، ایران محمد جعفر استاد احمد قرابی استادیار، گروه مهندسی مکانیک، واحد سمنان، دانشگاه آزاد اسلامی ، سمنان، ایران علیرضا ارغوان عضو هیئت علمی، گروه مهندسی مکانیک، واحد سمنان، دانشگاه آزاد اسلامی ، سمنان، ایران

this paper presents the fatigue life behavior of hub using random vibration based on road roughness. the main objectives of this study are to predict the fatigue life and to identify the critical location for evaluating fatigue damage. asphalt road surface profiles obtained in favorable circumstances by topography cameras and in according road classification iso 2631-1estimate road roughness su...

The stored deformation energy in the dislocation structures in a polycrystalline metal can provide a sufficient  driving force to move grain boundaries during annealing. In this paper, a thermodynamically-consistent three-dimensional, finite-strain and dislocation density-based crystal viscoplasticity constitutive theory has been developed to describe the distribution of stored energy and dislo...

Journal: :journal of solid mechanics 0
m motamedi faculty of engineering, university of shahreza, p. o. box 86149-56841, isfahan, iran m mosavi mashhadi department of mechanical engineering, university of tehran, p.o. box 11365-4563, tehran, , iran

this work is conducted to obtain mechanical properties of microtubule. for this aim, interaction energy in alpha-beta, beta-alpha, alpha-alpha, and beta-beta dimers was calculated using the molecular dynamic simulation. force-distance diagrams for these dimers were obtained using the relation between potential energy and force. afterwards, instead of each tubulin, one sphere with 55 kda weight ...

Alitavoli , M., Ansari Khalkhali, R., Darvizeh, A., Sedaghat, A.,

In this study, first by using the finite element method, fatigue life of fiber metal laminates of Glare type subjected to impact was obtained and the numerical results of the model were compared with the experimental results. With regard to the very good matching between numerical and experimental results, then the results of the finite element model were generalized and expanded, and with usin...

J.N Reddy, W Kim

In this paper, a comparison of weak-form Galerkin and least-squares finite element models of Timoshenko beam theory with the von Kármán strains is presented. Computational characteristics of the two models and the influence of the polynomial orders used on the relative accuracies of the two models are discussed. The degree of approximation functions used varied from linear to the 5th order. In ...

Journal: :international journal of automotive engineering 0
r. hosseini m. azadi .m sadeghi hegar .y pournaghi .m shariyat

in the present paper, the modal analysis on a full finite element model of an off-road vehicle. this vehicle was modeled in the catia software and then meshed in the hypermesh software. the free vibration analysis was conducted by the abaqus software. by applying an external displacement, the forced vibration analysis was also performed. as a result, natural frequencies and shape modes were ext...

The following study deals with the updating the finite element model of structures using the operational modal analysis. The updating process uses an evolutionary optimization algorithm, namely bees algorithm which applies instinctive behavior of honeybees for finding food sources. To determine the uncertain updated parameters such as geometry and material properties of the structure, local and...

Journal: :international journal of advanced design and manufacturing technology 0
najmeh khazraiyan islamshahr university n. dashtian gerami m. damircheli

in this article, finite element method and ale formulation were used to numerically simulate impact of low-velocity specific projectiles with water surface. for the simulation, ls-dyna finite element code was used. material models which were used to express behavior of air and water included null material model. for the projectile, plastic-kinematics material model was applied. mie-gruneisen eq...

Journal: :international journal of civil engineering 0
f. dastjerdy civil engineering faculty, k.n.toosi university of technology, no. 1346, vali asr street, mirdamad intersection, tehran, iran o.r. barani civil engineering faculty, k.n.toosi university of technology, no. 1346, vali asr street, mirdamad intersection, tehran, iran f. kalantary civil engineering faculty, k.n.toosi university of technology, no. 1346, vali asr street, mirdamad intersection, tehran, iran

in this paper, a finite element model is developed for the fully hydro-mechanical analysis of hydraulic fracturing in partially saturated porous media. the model is derived from the framework of generalized biot theory. the fracture propagation is governed by a cohesive fracture model. the flow within the fracture zone is modeled by the lubrication equation. the displacement of solid phase, and...

Journal: :علوم و تکنولوژی پلیمر 0
میرحمیدرضا قریشی صدیقه سلطانی امیرهوشنگ اعتمادی

afinite element model of a bias truck tire under static vertical load using a global/local technique is designed in two parts. in the first part a previously created model for radial tires is developed to take the constructional variables of bias tires into account. it is shown that the technique can successfully be used for bias tires. the main challenge here is the selection of the initial la...

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