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EXPERIMENTAL AND COMPUTATIONAL STUDY OF DAMAGE PROCESS IN CFRP COMPOSITE BEAMS UNDER LOW VELOCITY IMPACT
Date
2016-07-03
Author
Topaç, Ömer Tanay
Gürses, Ercan
Çöker, Demirkan
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https://hdl.handle.net/11511/87329
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Experimental and computational study of the damage process in CFRP composite beams under low-velocity impact
Topac, O. Tanay; Gözlüklü, Burak; Gürses, Ercan; Çöker, Demirkan (2017-01-01)
Damage process in composites subjected to low-velocity impact is investigated both experimentally and numerically. Drop-weight impact experiments are carried out, in which a model unidirectional [0(5)/90(3)](s) CFRP laminate beam is impacted by a cylindrical head creating an almost uniform two-dimensional loading condition. Initiation and progression of damage, consisting of matrix cracks and delamination, are visualized in real-time via ultra-high-speed camera at rates up to 60,000 fps and the sequence of ...
Experimental and Computational Investigation of Out-of-Plane Low Velocity Impact Behavior of CFRP Composite Plates
Topac, O. T.; Tasdemir, B.; Gozluklu, B.; Gürses, Ercan; Çöker, Demirkan (2015-06-11)
Strength of composite materials under transverse loading has remained a major weakness despite numerous advancements in composite technologies. Most frequent and critical result of this characteristic is internal delamination damage, which is undetectable and lead to major strength reduction in the structure. This condition is usually encountered in low-velocity impact situations which frequently occur during the maintenance of aircraft. Past studies have successfully developed experimental and analysis met...
Experimental and numerical investigation of surfactant effects on the thermal conductivity of carbon nanotube nanofluids
Dursunkaya, Erdem; Okutucu Özyurt, Hanife Tuba; Turgut, Alpaslan; Department of Mechanical Engineering (2016)
Nanofluids are suspensions of nanometer sized particles in base fluids. They have been of great interest in heat transfer applications for their unexpectedly superior thermal properties, especially their thermal conductivity. For almost two decades, scientists have been preparing nanofluids with various base fluids and particles, and have been observing their thermal properties and stability. Despite all the research, nanofluids are yet to achieve widespread use because of incoherent research results, stabi...
Experimental And Numerical Investigation Of Impact Induced Damage Progression in Fiber Reinforced Composites
Gürses, Ercan; Çöker, Demirkan (null; 2016-08-21)
Damage process in composites subjected to low-velocity impact is investigated both experimentally and numerically. Drop-weight impact experiments are carried out, in which a model unidirectional [0/90]s carbon fiber reinforced polymer (CFRP) laminate beam is impacted by a cylindrical head creating an almost uniform two-dimensional loading condition. Damage sequence is visualized in real-time via ultra-high-speed camera and the resulting final failure patterns are characterized by a digital microscope. I...
Experimental and Computational Investigation of Vortex Formation in a Vertical Intake Structure
Aydın, İsmail; Köken, Mete (2013-09-13)
Vortex formation in the head pond of a hydroelectric power plant has been studied experimentally in a scaled hydraulic model. Velocity vector field and the turbulent kinetic energy distributions were measured using an Acoustic Doppler Velocimetry (ADV). Free surface flow in the head pond was also simulated using Flow-3D software. Comparison of measured and computed flow variables were satisfactorily good, promising the use of CFD tool to identify surface vortex and calculate its strength from the numerical ...
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Ö. T. Topaç, E. Gürses, and D. Çöker, “EXPERIMENTAL AND COMPUTATIONAL STUDY OF DAMAGE PROCESS IN CFRP COMPOSITE BEAMS UNDER LOW VELOCITY IMPACT,” 2016, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/87329.