In-plane Gelerkin Finite Element Analysis for Fibrous Composite Panels
عبدالعزيز مسعود الكانوني
المشرف د.النفاتي محمد الورفلي
واصفات البياناتعرض سجل المادة الكامل
Fibrous composite materials in these days are very beneficial and enter in uses of structures for various industrial and aerospace applications. These applications are in many fields like conveyance pipes, bridges and shells, also for automobile parts and energy applications, and in medical uses like bone replacement. Thus, composite materials are used in high stressed light weight constructions, so it becomes very important to develop deep insight into the failure strength of composite materials.The present work concentrates on analysis of laminates by considering symmetrical laminates having layers of fiber-reinforced material being typically oriented in different directions to obtain different strengths and stiffnesses.For specific elastic properties of composite materials the study compares different failure modes and strenghts of various composite plates with different number of layers, material properties, fibrous orientations, and variable thickness.Laminates subject to study are basically multilayered angle-ply laminates with different number of plies which are reinforced with different laminates angles, these angles are present in a constant stacking sequence.The goal of the thesis is the study of optimal fiber angles of an angle-ply symmetric laminates, and understanding how laminates responed to loads to find the strength within each laminate, and to study laminate behavior with different number of plies, fiber orientations, material properties, and thickness ratio between the layers.The F.E (Galerkin’s method) is used in the current study. The formulation based on classical lamination theory, with the effect of orthotropic material behavior, considering plates under the action of in-plane loads.The thesis consists of four major parts. The first part (Chapter 3) presents the mathematical model. The second part (Chapter 4) demonstrates the finite element method, the Galerkin method with 4-node two degrees of freedom and Isoperimetric Element (linear element) are employed. The third part (Chapter 5) covers the failure criteria, which followed Tsai-Hill criteria. The fourth part (Chapter 6) involves a case study and results.Thesis summary by Arch: Maha Abdo Al-rahman Agheel to Department of Architecture and Urban Planning, Faculty of Engineering, Tripoli University. Title: Assessment of the Educational Process of Architectural Design subject: Case Study (Studios of Architecture Department at Tripoli University).The purpose of this thesis is evaluating the educational process of architectural design subject in Department of Architecture and Urban Planning studios at the University of Tripoli. Aming to find out the strengths and weaknesses of the educational process of the architectural design subject. To build the theoretical framework literature review was condacted which includes the definitions, philosophical concepts, knowledge dimensions and teaching methods of architectural design. As well as defining many terms such as design, design process, assessment, and aspects of assessment followed by exploring many models which used to evaluate educational maters followed by building a model of this research which includs three major factors: performance inside the studio, the syllabus, and the learning environment (studio), and every major factor includes several secondary factors . As these factors has been formulated in the form of a questionnaire to gather the necessary data to know and assess the reality of the educational process of the architectural design subject. Based on the above, the results have been reached, including the following: some important design skills are not enough developed as creativity and criticism skills. The students need to develop their schematic and oral presentation skills, in addition that the architectural design subject needs to be developed, also what must take into account is how to assess student inside the studio, and the studio needs to be reconsidered in terms of the numbers of students in each studio, teaching aids and the furnitures.