Prof. Dr. Amr Adly. Congratulations!Prof. Dr. Amr Adly, the Vice President for Graduate Studies and Research of Cairo University, has been awarded the esteemed "2016 ECE Distinguished Alumni Award" from The Department of Electrical & Computer Engineering, Maryland University, USA. The award is granted annually to alumni that have provided leadership and meritorious contributions in the broad field of engineering. We are delighted by Dr. Adly's continous achievements and we wish him even more success in the years to come. Dr. Adly is a strong supporter of our research work, and has been at our aid since the start of the CUFEBE research group. Simply, all our developments and achievements have only been possible with his confidence in our group, his leadership and his contributions. All of which align with the prestigious award he was granted. Congratulations Dr. Amr Adly!
Ramadan CUFE-BE Iftar 3 - TAHA HOUSEDr. Taha AboElNaga invited the research group to an iftar at his wonderful and peaceful home in Kaha, Benha (a rural area which takes you back to traditional Egyptian culture). The calm atmosphere and friendly environment there cannot be reproduced, and all the people who attended were happy with the hospitality and food. There was a huge attendance, and Dr.Taha's family welcomed the group, his parents and his daughters and so. Such a setting is rare, especially with the tastey food. Thank you Dr.Taha!
Ramadan CUFE-BE Iftar 2Today we had the second friendly gathering for a group Iftar at our CUFEBE headquarters at Cairo University. There was a huge attendance from the group members and from other friends of the group (13 people attended). It was successful and everyone had fun. Even more Ramadan Iftars are planned by the group and we ENCOURAGE EVERYONE TO JOIN US!
Ramadan CUFE-BE Iftar 1On the fourth day of Ramadan we had a friendly gathering for a group Iftar (breaking fast at dusk) at our headquarters at Cairo University. There was a huge attendance from the group members and from other friends of the group (15 people attended). It was successful and everyone had fun. More Ramadan Iftars are planned by the group soon, as done every year.
NEW PUBLICATION: Youssef F. Rashed, "Boundary element analysis of post-tensioned slabs".In this paper, the boundary element method is applied to carry out the structural analysis of post-tensioned flat slabs. The shear-deformable plate-bending model is employed. The effect of the pre-stressing cables is taken into account via the equivalent load method. The formulation is automated using a computer program, which uses quadratic boundary elements. Verification samples are presented, and finally a practical application is analyzed where results are compared against those obtained from the finite element method. The proposed method is efficient in terms of computer storage and processing time as well as the ease in data input and modifications.
NEW PUBLICATION:Morcos F. Samaan, Mohammed E. Nassar, Youssef F. Rashed, "Taylor series fast multipole boundary element method for solution of Reissner's shear deformable plate bending problems".In this paper, a new fast multipole BEM for the solution of Reissner's plates is presented. The suggested formulation is based on expressing the fundamental solutions in forms of potentials. Hence, these potentials and their relevant fundamental solutions are expanded by means of Taylor series expansions. Accordingly, the far field integrations are represented by these series expansions and summed for far clusters, whereas the near field integrations are kept to be computed directly. In the present formulation, equivalent collocations are based on both first and second shift collocations for kernels. By the present implementation of the fast multipole BEM in coupling with iterative solver (GMRES), the computational cost is rapidly reduced from O(N3) in the conventional BEM to O(N log N) and O(N) for first and second shift respectively. Numerical examples are given to demonstrate the efficiency of the formulation against the conventional direct BEM. The accuracy of the results is traced by truncating Taylor series expansions to certain terms. It was demonstrated via numerical examples that three terms for both first shift and second shift are enough to produce sufficient accuracy with substantial reduction of solution time .
Ahmed Fady's & Mousa Maher's Athens TripCUFE-BE constantly seeks the collaboration with other research groups in many fields. To support this commitment, Junior researchers from CUFE-BE consistently travel to research groups worldwide for training, information sharing and experience. The most recent travel was completed by our very own Eng. Ahmed Fady who has completed his MSc degree in Structural Engineering. His trip to Greece included a thorough visit to the National Technical University of Athens for two months and to a couple of entertaining sites throughout Athens: "Scientifically I managed to attend two meetings with Professor J. Katsikadelis, and discussed some issues about soil-structure interaction with boundary element method. I also attended a seminar on how to use Matlab in Dynamics by Professor Dimitrios Vamvatsikos. I was a guest to 3 lectures about probability and statistics by Professor Dimitrios Vamvatsikos, and met with Dr. Nick Babouskos discussing some issues related to the boundary element method and I illustrated how to use PLPAK software and the research capabilities in it, and a quick meeting with professor Nikos Lagaros. On the entertainment side, I visited: Acropolis of Athens, Parthenon, Acropolis Museum, National Archaeological Museum, Temple of Hephaestus, Temple of Olympian Zeus, Odeon of Herodes Atticus, Arch of Hadrian, Old Parliament. . Please check my picture of me with Professor J. Katsikadelis".
Seminar for MSc Degree:"Implementation of GPU Computing for Reissner's Plate Bending Theory" by, Eng. Ahmed Torky.The main objective of this research is to provide an implementation of GPU computing on the direct boundary element method formulation for Reissner's plate bending theory for constant elements and practical quadratic elements.The PLPAK(Plate Bending Package using BEM) was reprogrammed on CUDA to solve actual slabs and raft foundations.Then, a comparison of the performance of each kernel optimized by the GPU is set against optimized serial CPUs.The subsequent porting of the improved BEM algorithm on a GPU NVIDIA GTX 770 hardware has dramatically increased the performance speed with respect to the fully featured CPU code executed on an up-to-date workstation, with speed-ups reaching 2000x for the solution of system of equations with O(N^3) complexity and speed-ups reaching 30x for the solution of internal point straining actions with O(N^2) complexity (for practical slabs and raft foundations).In some cases the whole solution of complex massive slabs was reduced from 23 hours to a mere 30 minutes.
GPU Computing Sessions (Fortran and C).As part of building up the capacity of our research group, eight sessions on GPU programming produced by Eng. Ahmed Torky are currently under way. Why take these sessions? You'll be introduced to the fundamentals of massively parallel computing by using CUDA Fortran and C/C++ to program modern GPUs. You'll learn the GPU programming model and architecture, key algorithms and parallel programming patterns, and optimization techniques. The session is taught every Saturday, starting at 7:30 pm in the Civil Engineering Building, Faculty of Engineering, Cairo University.
NEW PUBLICATION: George S.A. Fam, Youssef F. Rashed, "An efficient meshless technique for the solution of transversely isotropic two-dimensional piezoelectricity".In this paper, a new meshless technique is presented for the solution of two-dimensional piezoelectricity problem. The technique derivation is based on the solution of the corresponding analog equation by transforming the original set of differential equations into three Poisson equations with unknown right hand side terms. Boundary discretisation of the resulting integral equations is eliminated by the use of the method of fundamental solutions. The right hand side terms are represented in the solution as particular solutions expressed in terms of radial basis functions. The problem solution is then rewritten in its new form, which involves complementary solution and particular solution. The governing partial differential operator for piezoelectricity is applied on the obtained solution form and forced to be satisfied at a set of domain points, whereas the prescribed boundary conditions are satisfied at another set of boundary points. The proposed technique is implemented into computer code where several numerical examples with different boundary conditions are tested. The results demonstrated excellent agreement with those obtained from analytical and FEM solutions.
Recently Published: "The Analog Equation Integral Formulation for Plane Piezoelectric Media",by George S.A. Fam, Youssef F. Rashed, John T. Katsikadelis.In this paper, the two-dimensional piezoelectricity is modelled using a boundary integral formulation based on its corresponding Analog Equation. The problem is transformed into three uncoupled Poisson's equations with unknown fictitious body forces terms. The multiquadric radial basis function is used to approximate the fictitious body forces in the particular solutions. The problem is solved by satisfying the governing differential operator and the boundary conditions. A scaling process is used to enhance the numerical behaviour of the obtained system of equations. The formulation is mathematically simpler than formerly proposed BEM formulations and its validity, applicability and accuracy are demonstrated through various numerical example.
Structural Engineering Year 4 Graduation Presentations.Today a select number of Year 4 undergraduate students from the Faculty of Engineering (Cairo University)', at the department of Civil Engineering, presented their work as part of fulfilment of their Bachelor's Degree. The students' work is motivated by research from CUFE-BE members. Congratulations are due to all of them on their outstanding work!
New HPC power provided by Faculty of Engineering, Cairo UniversityCUFE-BE has been provided with new GPU computability power with the arrival of a new tower containing a Nvidia GeForce GTX770 VGA card. This new system allows for CUDA-enabled programming, facilitating High Performance Computing in computational mechanics. The system is funded by the Faculty of Engineering at Cairo University.
Recently Published: "Boundary Element Analysis of Multi-Thickness shear-deformable slabs without sub-regions",by Mina Wagdy, Youssef F. Rashed.In this paper, a new boundary element formulation is developed for the analysis of multi-thickness slabs. The shear deformable plate bending theory is employed. The additional thickness is added to the plate using additional stiffness matrix. A new systematic methodology for deriving stiffness matrix of additional thicknesses or drops is presented..