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FEM Analysis of the Effects of Geometric Parameters on the Superplastic Forming of Metal Matrix Composit
, M.Sc. Thesis Sharif University of Technology ; Abedian, Ali (Supervisor)
Abstract
In aerospace applications, the weight of structures is considered as a major performance parameter. One of the most effective ways for weight reduction is then attributed to the structurally continuous manufacturing of mechanical components. In this way, not only the weight, but also the stress concentration, the cost, joints and fasteners applications, and the time of manufacturing are noticeably reduced. With this method, components with complicated shapes could be formed in a single manufacturing step. Special specification of whisker reinforced Metal Matrix Composites (MMC’s) has made these materials very attractive for the aerospace applications.That is why the superplastic forming of...
A modified three-dimensional analytical model for stress prediction in short fibre composites
, Article 8th International Conference on Computational Structures Technology, CST 2006, Las Palmas de Gran Canaria, 12 September 2006 through 15 September 2006 ; Volume 83 , 2006 ; 17593433 (ISSN); 9781905088089 (ISBN) ; Abedian, A ; Mondali, M ; Sharif University of Technology
Civil-Comp Press
2006
Abstract
A modified analytical model is developed for analysis of 3-D elastic stress fields in short fibre composites subjected to an applied axial load. Two sets of exact displacement solutions for the matrix and fibre are derived based on the theory of elasticity. The superposition of these two solutions are then used to obtain the analytical expressions for the 3-D stress field components over the entire composite system including the fibre end region which is modelled by the use of imaginary fibre technique. The main difference with the previous works here is that the stress field is considered to be dependent on both radial and axial directions. Such an assumption made it possible to calculate...