KTMM Seminar: Robust Process Design in Liquid Composite Molding

Merhabalar, 

4 Ekim Çarşamba günü, 13:40-14:30 saatleri arasında Kompozit Teknolojileri Mükemmeliyet Merkezinde, Abdullah Gül Üniveristesi'nden Doç.Dr.Hatice S.SAS  "Robust Process Design in Liquied Composite Molding" başlıklı seminer verecektir.

Sabancı Üniversitesi -Teknopark Gidiş 

Teknopark- Sabancı Üniversitesi Dönüş

Araç Hareket Alanı : KTMM Binası Önü  

Title:                    Robust Process Design in Liquied Composite Molding

Speaker:              Hatice S.SAS, Abdullah Gül University

Time:                   Oct. 4, 2017, 13:40-14:30

Place:                  Teknopark- KTMM

Abstract: 

Liquid Composite Molding (LCM) processes, reinforcing glass, carbon or Kevlar fiber preforms are placed in a mold cavity and a liquid resin is introduced to cover the remaining empty space to form a composite by curing the resin. The fiber preform permeability plays a key role in the filling pattern of the mold, which dictates if there will be any voids in the composites. The variability in the permeability due to the variation in the preform or its placement in the mold can influence the quality of the part being manufactured. The permeability map of a preform specifies the values of permeability tensor at various locations of the preform. The overall objective of this work is to create a permeability map that will ensure filling to achieve manufacturing success despite the variability of the filling pattern, a requirement of robust process design. As permeability plays a central role, first, a characterization method to measure permeability and its variation is established. To quantify the variation within the preform Kardar-Parisi-Zhang equation and related growth coefficients are explored. This should prove useful in addressing the statistical variation in the manufactured preform. Then, a methodology will be introduced to create a permeability map for a given mold geometry along with inlet and vent locations which will allow the mold to completely fill despite the variations in the preform and the flow disturbances caused due to its placement. A discrete optimization algorithm is adapted to conduct this optimization of the preform permeability.

Biograph: 

Hatice S. Sas is currently an assistant professor in the Department of Mechanical Engineering at Abdullah Gül University where she is working on process modeling and optimization of composite materials. She received her Ph.D. degree in processing of composite materials from the Department of Mechanical Engineering at the University of Delaware in 2015. Her Ph.D. studies were on process design in Liquid Composite Molding processes for advanced composite manufacturing, characterization of the fibrous materials, and flow and cure modeling to optimize the composite manufacturing processes while working as a research assistant at the Center of Composite Materials under the advisory of Prof. Suresh G. Advani. She obtained her B.S. and M.S. degrees in Mechanical Engineering at the Middle East Technical University in Ankara. Her master’s thesis focuses on development of a mathematical model and performing numerical solution for particle filled resin flow through fibrous preform in Compression Resin Transfer Molding process.