Now showing items 14-33 of 206

    • Cement flow during impaction allografting: a finite element analysis 

      Frei, Hanspeter; A.Masri, Bassam; S.Gadala, Mohamed; ETAL.. (Science Direct, 2016-02)
      Cement intrusion into cancellous or impacted bone is not well understood. We adopted an engineering mechanics approach to predict the effect of surgical variables on the cement intrusion into impacted cancellous bone, used ...
    • Centrifugal Compressor Spiral Dry Gas Seal Simulation Working at Reverse Rotation 

      Shahin, Ibrahim; Gadala, Mohamed S.; Badr, Osama (Elsevier, 2013)
      Unidirectional dry gas seal may experiences reverse rotation when equipped in a centrifugal compressor. This paper describes how the reverse rotation effects on the spiral unidirectional dry gas seal performance and pressure ...
    • Centrifugal compressor spiral dry gas seal simulation working at reverse rotation 

      Shahin, Ibrahim; Gadala. Mohamed S; Alqaradawi, Mohamed; ETAL.. (Science Direct, 2013-01)
      Unidirectional dry gas seal may experiences reverse rotation when equipped in a centrifugal compressor. This paper describes how the reverse rotation effects on the spiral unidirectional dry gas seal performance and pressure ...
    • CFD Analysis on the Single-Phase Flow Electrical Submersible Pump Performance Curve 

      Kassem, O.M.; Abdullah, A.Q.; Dol, S.S.; Gadala, Mohamed S.; ETAL. (Public Knowledge Project, 2020-12)
      Most of the industrial fields, especially oil and gas, involve the application of electrical submersible pump (ESP) for flow transport. The pump performance will deteriorate depending on conditions of usage. The main ...
    • A CFD Simulation for a Two-Phase Turbulent Bed Contactor 

      Khalifeh, Hadil Abu; Alkhedher, Mohammad; Fernandes, Shannon (IEEE Xplore, 2019-04)
      Turbulent bed contactors (TBC) employed extensively in process industry and received much attention due to their high efficiency, and low capital and operating costs. In this paper, bed hydrodynamics including pressure ...
    • A complete finite element treatment for the fully coupled implicit ALE formulation 

      Bayoumi, H. N.; Gadala, Mohamed S. (Springer Link, 2004-04)
      This paper presents a complete derivation and implementation of the Arbitrary Lagrangian Eulerian (ALE) formulation for the simulation of large deformation quasi-static and dynamic problems. While most of the previous work ...
    • Computational implementation of stress integration in FE analysis of elasto-plastic large deformation problems 

      Wang, J.; Gadala, Mohamed S. (Science Direct, 2000-06)
      In this paper, we compare different numerical implementation algorithms for the rate type constitutive equation and present an integration scheme based on the physical meaning of the stress. Numerical implementation of ...
    • A consistent Eulerian formulation of large deformation problems in statics and dynamics 

      Dokainish, M.A.; Oravas, A'E.; Gadala, Mohamed S. (Science Direct, 2002-09)
      A concise survey of formulation methods of geometric and material non-linearity problems is given. The survey is concerned mainly with the differences between updated Lagrangian and Eulerian formulations, and with the ...
    • Continuum bases and consistent numerical formulations of nonlinear continuum mechanics problems 

      Oravas, G. Ae; Dokainish, M. A.; Gadala, Mohamed S. (1984)
      The referential-description, spatial-description, and relative-description formulations in the finite-element approach to continuum-mechanics problems are reviewed and developed. Explicit final incremental equilibrium ...
    • Cooling Concrete Aggregates: Challenges in Design and Simulation 

      AHMED, K. I. E.; HAMOUDA, A.M.S.; Gadala, Mohamed S. (Ahmed, K. I. E., HAMOUDA, A., & GADALA, M. Cooling Concrete Aggregates: Challenges in Design and Simulation. In 6th IASME/WSEAS International Conference on Heat Transfer, Thermal Engineering and Environment (HTE'08) (pp. 20-22)., 2008-08)
      Using hot aggregates in concrete making results in drop in compressive strength of the produced concrete. Various methods have been proposed for cooling concrete aggregates. In this paper we propose a modified design for ...
    • Coupled finite element modeling of piezothermoelastic materials 

      Senousy, M. S.; Rajapakse, R. K. N. D.; Gadala, Mohamed S. (International Society for Optics and Photonics,, 2007)
      The governing equations of piezo-thermoelastic materials show full coupling between mechanical, electric, and temperature fields. It is often assumed in the literature that in high-frequency oscillations, the coupling ...
    • Creation of Different Cell Layouts Using Part Assignment Process for Manufacturing a Traction Drive Speed Reducer 

      Abu Jadayil, Wisam; Abu Jadayil, Seham; Khraisat, Walid; ETAL.. (AURAK, 2017-09)
      : Cellular manufacturing is an advanced technique to improve the manufacturing efficiency. This paper is comparing the efficiency of three different layouts for manufacturing self-actuating traction drive speed reducer ...
    • Crystal growth of PMN-PT for energy harvesting applications 

      M. Nawash, Jalal; Al-Khedher, Mohammad (IEEE, 2017-05-15)
      The harvesting of mechanical energy has been investigated extensively over the last decade. This type of harvesting is widely utilized in the applications of vibration-based energy harvester. Energy harvesting using ...
    • Deep spinning of sheet metals 

      Ahmed, Khaled I.; Gadala, Mohamed S.; Mohamed G.El-Sebaie (Science Direct, 2015-07)
      Spinning of sheet metals into cylindrical cups is an important sheet metal forming process for its advantages of flexible tooling and very small forming loads. The most challenging aspect in this process is its low formability ...
    • Design and Implementation of Myoelectric Controlled Arm 

      Younes, Tariq M.; AlKhedher, Mohammad; Soliman, Abdel-Hamid; ETAL.. (International Association of Research and Science, 2021-07)
      In this paper, a discrimination system, using a neural network for electromyogram (EMG) externally controlled Arm is proposed. In this system, the Artificial Neural Network (ANN) is used to learn the relation between the ...
    • Design and Manufacturng of Self Actuating Traction Drives with Solid and Hollow Rollers 

      Abu Jadayil, Wisam; S. Mohsen, Mousa (2010-09)
      The friction drive speed reducer proposed by Flugrad and Qamhiyah in 2005 was mainly investigated in this paper. That self actuating traction drive uses six intermediate cylindrical rollers to transmit motion. Those rollers ...
    • Designing an Effective Intersection Collision Warning System 

      Almuttiri, Abdullah S.; Almutairi, Ohud M.; Al-Khedher, Mohammad (International Journal of Enhanced Research in Science Technology & Engineering, 2014-01)
      The emergence of Vehicular Ad Hoc Networks has made effective communications between vehicle and infrastructure possible. Such systems enable the provision of many services in the automobile environment, including safety, ...
    • Different Strategies to Improve the Production to Reach the Optimum Capacity in Plastic Company 

      Abu Jadayil, Wisam; Khraisat, Walid; Shakoor, Mwafak (Taylor & Francis, 2017-10)
      In this paper a case study of a company was studied to determine the main factors affecting its production capacity, and study their influence to improve the production capacity to reach the optimum. Different aspects were ...
    • Dynamic analysis of short and long journal bearings in laminar and turbulent regimes, application in critical shaft stiffness determination 

      Hemmati, Farzad; Miraskari, Mohammad; Gadala, Mohamed S. (Elsevier, 2017-04)
      Linear and non-linear stability of a flexible rotor-bearing system supported on short and long journal bearings is studied for both laminar and turbulent operating conditions. The turbulent pressure distribution and forces ...
    • Dynamic thermo-electro-mechanical performance of piezoelectric stack actuators 

      F. X. Li; D. Mumford; Gadala, Mohamed S.; ETAL. (Society of Photo-Optical Instrumentation Engineers, 2007-04)
      Piezoelectric actuators are increasingly used in modern fuel injectors due to their quick response, high efficiency, and excellent repeatability. Current understanding of the thermo-electro-mechanical performance of ...