• A brief review on the influences of nanotubes' entanglement and waviness on the mechanical behaviors of CNTR polymer nanocomposites 

  Ebrahimi, Farzad؛ Dabbagh, Ali (University of Tehran, 2020-06-01)

  Invention of carbon nanotube (CNT) in the 1990s introduced a new class of materials whose extraordinary mechanical, thermal, and electrical properties seemed appealing enough to the research community to devote their time ...

  ---

• Analytical and Numerical Investigation of Second Grade Magnetohydrodynamics Flow over a Permeable Stretching Sheet 

  Javanmard, Mohsen؛ Taheri, Mohammad Hasan؛ Abbasi, Morteza (University of Tehran, 2020-06-01)

  In this paper, the steady laminar boundary layer flow of non-Newtonian second grade conducting fluid past a permeable stretching sheet, under the influence of a uniform magnetic field is studied. Three different methods ...

  ---

• Analytical buckling and post-buckling characteristics of Mindlin micro composite plate with central opening by use of nonlocal elasticity theory 

  Jamali, Majid؛ Shojaee, Taghi؛ Mohammadi, Bijan (University of Tehran, 2020-06-01)

  The effect of central opening on the buckling and nonlinear post-buckling response of carbon nanotubes (CNTs) reinforced micro composite plate embedded in elastic medium is considered in this paper. It is assumed that the ...

  ---

• An Enhanced Finite Element method for Two Dimensional Linear Viscoelasticity using Complex Fourier Elements 

  Ghazi Mirsaeed, Seyed Ali؛ Kalatjari, Vahidreza (University of Tehran, 2020-06-01)

  In this paper, the finite element analysis of two-dimensional linear viscoelastic problems is performed using quadrilateral complex Fourier elements and, the results are compared with those obtained by quadrilateral classic ...

  ---

• Attractor Based Analysis of Centrally Cracked Plate Subjected to Chaotic Excitation 

  Jalili, Sina؛ Daneshmehr, Alireza (University of Tehran, 2020-06-01)

  The presence of part-through cracks with limited length is one of the prevalent defects in the plate structures. Due to the slight effect of this type of damages on the frequency response of the plates, conventional ...

  ---

• First Principles Derivation of Displacement and Stress Function for Three-Dimensional Elastostatic Problems, and Application to the Flexural Analysis of Thick Circular Plates 

  Onah, Hyginus Nwankwo؛ Onyia, Michael Ebie؛ Mama, Benjamin Okwudili؛ Nwoji, Clifford Ugochukwu؛ Ike, Charles Chinwuba (University of Tehran, 2020-06-01)

  In this study, stress and displacement functions of the three-dimensional theory of elasticity for homogeneous isotropic bodies are derived from first principles from the differential equations of equilibrium, the generalized ...

  ---

• A New Method for Assessment of Engineering Drawing Answer Scripts Using Fuzzy Logic 

  Haghshenas Gorgani, Hamid؛ Jahantigh Pak, Alireza (University of Tehran, 2020-06-01)

  Popular method for assessment of final exam answer scripts in university and among the engineering drawing answer scripts based on absolute true or false judgment and assigning a single number or letter to answer of each ...

  ---

• An Analytical Solution for Temperature Distribution and Thermal Strain of FGM Cylinders with Varying Thickness and Temperature-Dependent Properties Using Perturbation Technique 

  Parhizkar Yaghoobi, Mohammad؛ Ghannad, Mehdi (University of Tehran, 2020-06-01)

  This research presents temperature distribution and thermal strain of functionally graded material cylinders with varying thickness and temperature-dependency properties that are subjected to heat fluxes in their inner and ...

  ---

• A new technique for bearing fault detection in the time-frequency domain 

  Attaran, Behrooz؛ Ghanbarzadeh, Afshin؛ Moradi, Shapour (University of Tehran, 2020-06-01)

  This paper presents a new Fast Kurtogram Method in the time-frequency domain using novel types of statistical features instead of the kurtosis. For this study, the problem of four classes for Bearing Fault Detection is ...

  ---

• Investigation of instable fluid velocity in pipes with internal nanofluid flow based on Navier-Stokes equations 

  Fakhar, Mohammad Hosein؛ Fakhar, Ahmad؛ Tabatabaei, Hamidreza؛ Nouri-Bidgoli, Hossein (University of Tehran, 2020-06-01)

  In this article, the instable fluid velocity in the pipes with internal nanofluid is studied. The fluid is mixed by SiO2, AL2O3, CuO and TiO2 nanoparticles in which the equivalent characteristic of nanofluid is calculated ...

  ---

• Least squares weighted residual method for finding the elastic stress fields in rectangular plates under uniaxial parabolically distributed edge loads 

  Ike, Charles C.؛ Nwoji, Clifford U.؛ Mama, Benjamin O.؛ Onah, Hyginus N.؛ Onyia, Michael E. (University of Tehran, 2020-06-01)

  In this work, the least squares weighted residual method is used to solve the two-dimensional (2D) elasticity problem of a rectangular plate of in-plane dimensions 2a 2b subjected to parabolic edge tensile loads applied ...

  ---

• Simulation-based Vibration Sensor Placement for Centrifugal Pump Impeller Fault Detection 

  Zabihihesari, Alireza؛ A. Shirazi, Farzad؛ Riasi, Alireza؛ Mahjoob, Mohammad؛ Asnaashari, Erfan (University of Tehran, 2020-06-01)

  In this paper, a simulation-based method is proposed for optimal placement of vibration sensors for the purpose of fault detection in a centrifugal pump. The centrifugal pump is modeled to investigate the effect of vane ...

  ---

• Ultrasonic guided waves reflection from simple dent in pipe for defect rate estimation and parameters determination of axisymmetric wave generation source 

  Taghipour birgani, Pezhman (University of Tehran, 2020-06-01)

  In this paper, the reflection of ultrasonic guided waves from simple dent in pipes has been investigated using finite element method and the relationship between reflection coefficient of these waves and deformation rate ...

  ---

• Thermoelastic Response of a Rotating Hollow Cylinder Based on Generalized Model with Higher Order Derivatives and Phase-Lags 

  Hassan, Amr؛ Abouelregal, Ahmed؛ Khalil, Khalil-M؛ Nasr, Mohamed (University of Tehran, 2020-06-01)

  Generalized thermoelastic models have been developed with the aim of eliminating the contradiction in the infinite velocity of heat propagation inherent in the classical dynamical coupled thermoelasticity theory. In these ...

  ---

• Pareto Optimal Balancing of Four-bar Mechanisms Using Multi-Objective Differential Evolution Algorithm 

  Etesami, Ghazal؛ Felezi, Mohammad Ebrahim؛ Nariman-zadeh, Nader (University of Tehran, 2020-06-01)

  Four-bar mechanisms are widely used in the industry especially in rotary engines. These mechanisms are usually applied for attaining a special motion duty like path generation; their high speeds in the industry cause an ...

  ---

• Subcooled two-phase flow boiling in a microchannel heat sink: comparison of conventional numerical models 

  Soleimani, Ali؛ Hanafizadeh, Pedram؛ Sattari, Amirmohammad (University of Tehran, 2020-06-01)

  Subcooled flow boiling in multi-microchannels can be used as an efficient thermal management approach in compact electrical devices. Highly subcooled flow boiling of HFE 7100 is studied in two microchannel heat sinks to ...

  ---

• Torsional wave propagation in 1D and two dimensional functionally graded rod 

  Amiri, Alireza؛ Rahmani, Hossein؛ Ahmadi Balootaki, Mohammad (University of Tehran, 2020-06-01)

  In this study, torsional wave propagation is investigated in a rod that are made of one and two dimensional functionally graded material. Firstly, the governing equations of the wave propagation in the functionally graded ...

  ---

• A theoretical model for analysis of ionic polymer metal composite sensors in fluid environments 

  Salehi Kolahi, Mohammad Reza؛ Moeinkhah, Hossein (University of Tehran, 2020-06-01)

  By the past two decades IPMCs have been intensively studied because of their special capabilities for actuation and sensing.This paper presents a theoretical physics based model for analyzing the behavior of IPMC sensors ...

  ---

View more