5810

5425

كارشناسي ارشد

تكنولوژي نساجي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده نساجي

1389

نه،107ص.: مصور﴿رنگي﴾،جدول،نمودار

ص.ع.به فارسي و انگليسي

داريوش سمناني، علي زادهوش

3/2/90

عبدالكريم حسيني، محمود معصومي

مهندسي نساجي

ID5425

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

An Object Oriented Finite Element Method to Predict Mechanical Properties of Random Short Fiber Composites Hossein Ghayoor Karimiani h ghayoor@tx iut ac ir Year of Submission 2010 Department of Textile Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor Dr Dariush Semnani d semnani@cc iut ac ir Dr Ali Zadhoush zadhoush@cc iut ac ir Abstract With enhances in materials especially carbon and glass fibers the use of short fiber composites increased in the last decade Moreover functionality of these materials boosts because of these advances Nowadays short fiber composites show better performance and are used in more structural and functional applications A great percentage of these type of composites are manufactured with the injection molding method This method is superior to other methods of manufacturing composites because of its privileges in forming most kind of shapes and profiles However the process of manufacturing these composites results in arbitrary positioning of fibers in matrix due to fluid flow during manufacturing Composite materials became an outstanding substitution for traditional materials as they present a better mechanical performance Injection molded composites gained a great enthusiasm in different applications specifically in automotive and aerospace industries as they are practically formable to any profile Because of their manufacturing method they form a random orientation of fibers in resin Orientation of fibers is the most dominant parameter influencing the mechanical properties of composites and needs to be studied to gain a safe prediction for properties of manufactured properties As a result it is essential to predict or measure fiber orientation accurately for this purpose However in most of the studies random geometry of composites is approximated and simplified In this study an objected oriented finite element method has been presented which models composites by the finite element method based on their real orientations Randomly oriented composite sheets of glass and epoxy have been produced and based on their scanned images the finite element mesh has been generated Finally a prediction of Elastic modulus of these specimens has been made and compared with experimental data Keywords Short Fiber Composites Object Oriented Finite Element Mechanical Analysis

داريوش سمناني، علي زادهوش

عبدالكريم حسيني، محمود معصومي