الفهرس | Only 14 pages are availabe for public view |
Abstract This thesis consists of five chapters that are summarized as follow: Chapter 1: Introduction. In this chapter, the bolted flanged joint is introduced and defined. The bolted joint types are identified. Defining the main problem in the bolted flanged joint and obtaining the study objective. Chapter 2: Literature Survey. This chapter provides a literature review of the previous work done on the flanged bolted joint. The leakage cost on the joint is identified and also the bolted joint design with respect to the standard code. Chapter 3: Finite Element Modeling. The finite element modelling is defined in this chapter also the modelling steps, the effecting parameters on the model and the sources of nonlinearity on the model. The presented bolted joint model is described and modelled using finite element. The meshing, element, contact interactions, loads and constraints are indicated. The material properties for the established model are defined. The results of the mechanical loading model is shown and discussed. The results with developed to study the friction effect on the bolted joint model Chapter 4: Mechanical and Thermal Combined Loading Analysis The thermal stress and its effect on the modelling are defined. The combined thermal and mechanical model is described. The coupled thermal analysis which used in this model is defined and selecting the elements, creating the meshing, contact interactions, loads and boundary conditions. The model results is presented and discussed. The results from the combined loading model is developed to investigate the effect of joint behaviour under different bolt preload Chapter 5: Conclusions. The results from the mechanical and combined thermal and mechanical model are concluded. |