Browsing The University of Oklahoma by Author "M. Cengiz Altan"
Now showing items 1-8 of 8
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Calorimetric and Rheological Measurements of Three Commercial Thermosetting Prepreg Epoxies
Mitch Hargis; Brian P. Grady; Levent Aktas; Krishnasumanth R. Bomireddy; Steve Howsman; M. Cengiz Altan; Tom Rose; Hans Rose (Journal of Composite Materials, 2006-05-01)The cure kinetics of three different thermosetting resins are investigated using differential scanning calorimetry and oscillatory shear rheometry. For the latter, two different types of plates are used, smooth plates and ... -
Effect of Injection Rate and Post-Fill Cure Pressure on Properties of Resin Transfer Molded Disks
Kristian A. Olivero; Harry J. Barraza; Edgar A. O’Rear; M. Cengiz Altan (Journal of Composite Materials, 2002-08-01)The effects of flow rate andpost-fill cure pressure, i.e., packing pressure, on the mechanical properties of resin transfer molded disks are experimentally investigated. An experimental molding setup is constructed to ... -
Effect of Nanoclay Content on Void Morphology in Resin Transfer Molded Composites
Youssef K. Hamidi; Levent Aktas; M. Cengiz Altan (Journal of Thermoplastic Composite Materials, 2008-03-01)Effects of nanoclay content on morphology and spatial distribution of voids in resin transfer molded nanoclay/E-glass/epoxy composite disks are investigated. Closite®25A nanoclay loads of 2, 5, and 10wt% are mixed by ... -
Effect of Preform Thickness and Volume Fraction on Injection Pressure and Mechanical Properties of Resin Transfer Molded Composites
Kristian A. Olivero; Youssef K. Hamidi; Levent Aktas; M. Cengiz Altan (Journal of Composite Materials, 2004-06-01)An experimental study is performed to characterize the effect of the thickness of random preforms on injection pressure and mechanical properties of resin transfer molded (RTM) parts. Center-gated, disk-shaped parts are ... -
Experimental Characterization of Orientation Formation in a Mold Cavity with Sudden Contraction
Kristian A. Olivero; M. Cengiz Altan (Journal of Thermoplastic Composite Materials, 1999-07-01)Orientation formation of short fibers suspended in a flow through a planar mold cavity is experimentally analyzed. The suspension of corn syrup mixed with short fibers is injected into the mold at constant flow rate through ... -
Filtration and Breakdown of Clay Clusters during Resin Transfer Molding of Nanoclay/Glass/Epoxy Composites
Levent Aktas; Sudha Dharmavaram; Youssef K. Hamidi; M. Cengiz Altan (Journal of Composite Materials, 2008-11-01)Dispersion of nanoclay clusters during resin transfer molding of nanoclay/glass/epoxy disks is investigated. In addition to a center-gated disk containing only 14% glass fibers, three nanocomposite disks are fabricated ... -
A Grammatical Approach for Customization of Laminated Composite Materials
Soumitra Nandi; Zahed Siddique; M. Cengiz Altan (Concurrent Engineering, 2011-06-01)The wide range of properties covered by the manufacturable fiber—matrix combinations of composite materials, along with their directional property characteristics, provides designers with material selection flexibility ... -
A Review of Fiber-Reinforced Injection Molding: Flow Kinematics and Particle Orientation
M. Cengiz Altan (Journal of Thermoplastic Composite Materials, 1990-10-01)The existing flow and particle orientation models applicable to fiber- reinforced injection molding are reviewed. After a brief description of injection molding, previous studies on the flow kinematics and fiber reinforcement ...