Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Ahmet S. Yigit"'
Autor:
Christoforos S. Rekatsinas, Dimitris K. Siorikis, Christos V. Nastos, Nikolaos A. Chrysochoidis, Theodosios C. Theodosiou, Ahmet S. Yigit, Andreas P. Christoforou, Dimitris A. Saravanos
Publikováno v:
International Journal of Impact Engineering. 178:104628
Autor:
D.K. Siorikis, C.S. Rekatsinas, Ahmet S. Yigit, Andreas P. Christoforou, Nikolaos A. Chrysochoidis, Christos V. Nastos, T.C. Theodosiou, Dimitris A. Saravanos
Publikováno v:
Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015).
Autor:
Jasem M. Kamel, Ahmet S. Yigit
Publikováno v:
Journal of Sound and Vibration. 333:6885-6899
Rotary drilling systems equipped with drag bits or fixed cutter bits (also called PDC), used for drilling deep boreholes for the production and the exploration of oil and natural gas, often suffer from severe vibrations. These vibrations are detrimen
Publikováno v:
Day 1 Tue, January 26, 2016.
Stick slip and bit bounce are common problems while drilling the production sections of oil wells with Polycrystalline Diamond Compact (PDC) bits. The production section often encounters different lithology including highly fractured limestone, sand/
Publikováno v:
Composites Part B: Engineering. 43:1244-1251
A general elastoplastic contact/impact model of a spherical object and a supported transversely isotropic composite layer or a half-space is presented. The main feature of the model is a contact law that is developed based on elastic–plastic and fu
Autor:
Ahmed H. A. Ibrahim, Ahmet S. Yigit
Publikováno v:
Journal of Computational and Nonlinear Dynamics. 10
There has been growing interest to use composites in load carrying structures where high strength and light weight are of major concern, e.g., oil industry (offshore structures and platforms, pipe systems, and tubings), sports equipment, automobiles,
Publikováno v:
Key Engineering Materials. :367-372
This paper presents an elastoplastic impact model for a spherical object impacting a supported composite layer or a half-space. The model utilizes a contact law that has been developed based on elastic-plastic and fully plastic indentation theories.
Control of Linear Time-varying Structures by Vibration Confinement Using Limited Number of Actuators
Publikováno v:
Journal of Vibration and Control. 16:1685-1699
A control strategy based on time-varying gains for suppression and confinement of vibrations in linear time-varying structures using a limited number of actuators is proposed. It is assumed that the structure consists of parts that are sensitive to v
Publikováno v:
Applied Composite Materials. 17:463-472
This paper presents an experimental study for the normalized low-velocity impact response of composite plates. It is demonstrated that a characterization diagram that shows the relationship of three non-dimensional parameters with the normalized maxi
Publikováno v:
Composite Structures. 91:358-365
The characterization and commissioning of composite structures for impact resistance requires extensive analytical, computational and experimental studies. It is usually necessary that scaled model tests are carried out that represent real structure