Luo, Shaohua Liu, Zhaoqin Karami, Farzad Li, Junyang
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
This paper addresses an adaptive stabilization control problem of the fractional-order electrostatically actuated micro-electromechanical system (EAMS) which suffers from adverse effects like chaotic oscillation, input hysteresis, time delay, modeling uncertainty and constraints of sensor and output. The phase diagrams and bifurcation diagram are p...
Zhang, Dangquan Yassin, Mohammad-Hossein
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
The effect of carbon nanotube (CNT) aspect ratio on the elastic–viscoplastic response of polymer nanocomposites with and without interphase region is studied using the finite element method. Also, the interfacial debonding between the constituents of the nanocomposite is considered in the simulation. To characterize both the polymer and the interph...
Azizian-Farsani, Elaheh Ghodsiyeh, Danial Akbarzadeh, Saleh Khonsari, Michael M.
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
Fatigue life is one of the key parameters in investigating the elements which are under cyclic loading. It is known that during the fatigue loading, temperature of the specimen increases due to hysteresis heating which is referred to as the fatigue entropy. It has been also proven that when a metal experiences cyclic loading, the entropy at the fai...
Wang, Zhentao Zhang, Yaosheng Li, Rui Wang, Qisi Wang, Junfeng
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
The dispersal of liquid into ambient air through a tube is a common method of identical drop formation. In the present work, the regimes and dynamics of droplet and/or jet formation during ejection from a vertical capillary nozzle are experimentally studied. The time evolutions of regimes of droplet and/or jet formation are recorded using a high-sp...
Yıldırım, Vebil
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
Many models were offered in the literature to simulate the material gradation patterns within the functionally graded metal-ceramic structures. The present study provides a comprehensive and comparative numerical examination of the displacement and stress distributions in the three types of annular structures, namely spheres, cylinders, and annuli ...
Ramos, Anderson J. A. Almeida Júnior, Dilberto S. Santos, Alínia R. Araújo, Edson A. Aum, Pedro T. P.
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
Sucker rod pumping systems are well-known artificial lift methods, thereby improving the efficiency of oil production. However, the periodic movement performed by the string makes the system susceptible to mechanical failures, promoting operational shutdowns. This paper presents a new approach to the vibrational analysis of the sucker rod string th...
Hashemi Kachapi, Sayyid H.
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
In the current study, nonlinear vibration and stability analysis of piezo-harmo-electrostatic nanoresonator (PHENR) based on cylindrical nanoshell is investigated to compare nonlocal (NLT), nonlocal strain gradient (NSGT) and Gurtin–Murdoch surface/interface (GMSIT) theories with classical theory (CT). PHENR is simultaneously subjected to direct el...
Ribeiro, José Geraldo Telles de Castro, Jaime Tupiassú Pinho Meggiolaro, Marco Antonio
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
Relative displacement measurements are needed in many practical applications, in particular to estimate damage from the associated strains and to follow and/or to control paths of moving objects. In many cases, such as monitoring of huge structures like tall bridges or of moving objects like vehicles, it is much easier to indirectly measure displac...
Minuzzi, Felipe de Pinho, Jean Monteiro
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
A different methodology for implementing the standard mechanism reduction technique directed relation graph (DRG) is presented and applied to develop a new skeletal mechanism for ethanol. Two combustion processes, ignition delay time and flame speed, that are mandatory for a mechanism to reproduce are used to calculate the species coupling through ...
Strniša, Filip Urbic, Tomaz Plazl, Igor
Published in
Journal of the Brazilian Society of Mechanical Sciences and Engineering
In this work, the lattice Boltzmann (LB) method was applied to simulate incompressible steady and unsteady low Reynolds number (Re) flows around a confined cylinder. In the LB method, different collision models (Bhatnagar–Gross–Krook model, two-relaxation-time model, multi-relaxation-time model, and entropic lattice Boltzmann model) and a regulariz...
