In aerospace and automobile industries, the quality control of manufactured part is always a crucial requirement. It is impossible to be assured of functionality and quality of products without regarding this aspect. In free-state, manufactured non-rigid parts such as aeronautic products have deviations from their nominal (CAD) shape due to weight and residual stress, making it possibly unqualified for assembly. Therefore, prior to assembly, the geometric inspection needs to be implemented. In industry, dedicated inspection fixtures are commonly used to compensate for shape changes of non-rigid parts. The installation of these fixtures is usually time-consuming and costly. Obviously, a virtual inspection method which eliminates the need for specialized fixtures could significantly solve this problem. However, the development of a virtual inspection method for non-rigid parts made of composite materials is a challenging task because of their complex anisotropic nonlinear behavior. The first objective of this thesis is to study the behavior of non-rigid parts made of fiber-reinforced materials during assembly. This objective is fulfilled by developing a method to characterize the behavior of non-rigid composite parts with application to assembly process. To do so, suitable material models capable of capturing the large anisotropic deformation of non-rigid composite parts is firstly implemented. A characterization method for identifying material parameters of these models is then proposed. The second objective of this thesis is to develop an optimization method coupled with finite element analysis to find the optimal applied forces for conformity of non-rigid composite material parts during assembly. The behavior of non-rigid composite parts obtained from the characterization work is used to simulate the deformation of composite parts. In this thesis, FEA modelling was employed using the Abaqus/Standard software.
| Date | 22 Oct 2019 |
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| Original language | French |
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| Awarding Institution | - École de technologie supérieure
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| Supervisor | Tan Pham (Supervisor) & Vincent Francois (Co-supervisor) |
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Vu, N.-H. (Author),
Pham (Supervisor) & Francois (Co-supervisor),
22 Oct 2019Student thesis: Doctoral thesis › Doctorate in Engineering: Engineering