Iranian Journal of Science and Technology, Transactions of Mechanical Engineering

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Investigation of the Thermoelastic Behaviour of Magneto-Thermo-Viscoelastic Rods Based on the Kelvin-Voigt Viscoelastic Model
Iranian Journal of Science and Technology, Transactions of Mechanical Engineering - - Trang 1-17 - 2023
Jia Zhang, Yongbin Ma
In the classical linear viscoelastic framework, materials exhibit more significant creep and stress relaxation at high temperatures, making thermoviscoelastic analyses of materials essential in the design of some polymers. In this paper, a new generalized thermo-viscoelastic model is developed by introducing the Kelvin-Voigt theory of viscoelasticity, and the transient response of an elastic rod u...... hiện toàn bộ
Experimental Study on the Effect of Tubercle on Aerodynamic Characteristics of Swept Wings at low Reynolds Number
Iranian Journal of Science and Technology, Transactions of Mechanical Engineering - Tập 46 - Trang 783-792 - 2021
Jeena Joseph, A. Sathyabhama
Inspired from the Humpback whale flipper, airfoils and wings incorporated with sinusoidal leading edge are much studied for their improved aerodynamic characteristics like delayed stall and higher lift in post-stall region. In this work, the performance of different swept wings equipped with leading edge tubercles is studied by comparing with their baseline models at a low Reynolds number of 100,0...... hiện toàn bộ
Comparative Experiments on a Self-priming Pump Delivering Water Medium During Rapid and Slow Starting Periods
Iranian Journal of Science and Technology, Transactions of Mechanical Engineering - Tập 45 - Trang 1007-1019 - 2020
Yu-Liang Zhang, Zu-Chao Zhu, Yan-Juan Zhao, Jun Wu, Feng-Lin Zhou
This paper presents an experiment on the transient hydraulic performance of a self-priming pump for transporting clear water under fast and slow start-up states. In the experiment, five typical working conditions are set, and the evolution of preset rotating speed increases linearly. The similarities and differences between fast and slow start-up states are analyzed in detail. Results show an over...... hiện toàn bộ
A Chattering-Free Finite-Time Robust Synchronization Scheme for Uncertain Chaotic Systems
Iranian Journal of Science and Technology, Transactions of Mechanical Engineering - Tập 43 - Trang 995-1003 - 2018
Siamak Heidarzadeh, Hassan Salarieh
This paper addresses a simple chattering-free and finite-time convergent robust synchronization scheme for a general class of disturbed master and slave chaotic systems. Unlike traditional variable structure control schemes, the proposed controller does not directly include a switching function, and chattering is avoided. The term including switching function is the input of a low-pass filter wher...... hiện toàn bộ
Configuration Synthesis of Generalized Mechanism Based on Screw Theory
Iranian Journal of Science and Technology, Transactions of Mechanical Engineering - - 2019
Congcong Chen, Tuanjie Li, Yaqiong Tang
Three-Dimensional Free Vibration Analysis and Critical Speed of Pressurized Rotating Functionally Graded Cylindrical Shells
Iranian Journal of Science and Technology, Transactions of Mechanical Engineering - Tập 43 - Trang 113-126 - 2017
Mostafa Talebitooti
This paper presents an approximate solution for the free vibration analysis of rotating functionally graded cylindrical shells based on the three-dimensional theory, using layerwise theory. Equations of motion are derived by applying Hamilton’s principle. In order to accurately account for the thickness effects, the layerwise theory is used to discretize the equations of motion and the related bou...... hiện toàn bộ
Process Parameters Optimization of the Explosive-Welded Al/Cu Bimetal in the Incremental Sheet Metal Forming Process
Iranian Journal of Science and Technology, Transactions of Mechanical Engineering - Tập 43 Số S1 - Trang 945-956 - 2019
A. Gheysarian, Mohammad Honarpisheh
Analysis of Stress Relaxation Characteristics of Rubber Sealing Gaskets Under the Influence of Random Parameters
Iranian Journal of Science and Technology, Transactions of Mechanical Engineering - Tập 45 Số 3 - Trang 711-718 - 2021
Zhenyu Lei, Zhiqiang Wang
Dynamic Response of Timoshenko Beam Resting on Nonlinear Pasternak Foundation Carrying Sprung Masses
Iranian Journal of Science and Technology, Transactions of Mechanical Engineering - Tập 43 - Trang 419-426 - 2018
Ahmad Salah Edeen Nassef, M. M. Nassar, Mohamed M. EL-Refaee
The vibration characteristic of a Timoshenko beam resting on nonlinear viscoelastic foundation subjected to any number of spring-mass systems (sprung masses) is governed by system of nonlinear partial differential equations. The governing differential equations are examined using differential quadrature method to be transformed with boundary conditions into a set of algebraic equations. The nonlin...... hiện toàn bộ
Experimental and Theoretical Investigations of Lateral Indentation Process on Thin-Walled Quadrangular Metal Columns by Solid Cylindrical Indenter
Iranian Journal of Science and Technology, Transactions of Mechanical Engineering - Tập 42 - Trang 1-12 - 2016
Hamidreza Saadatfard, Abbas Niknejad, Mojtaba Firouzi
This article performs theoretical and experimental studies on quadrangular metal columns during the indentation process. The samples are laterally compressed between a rigid platen and a solid cylindrical indenter under the quasi-static loading. Several columns are prepared with different cross sections, initial lengths, wall thicknesses and various alloy materials and are tested by indenters with...... hiện toàn bộ
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