The impact of geometrical deviations on product life cycle
Author: Nguyen, Dinh Son
Supervisor: Brissaud, D. & Vignat, F.
Institution: Universite de Grenoble
Today requirements of customers concerning product they would like to purchase, such as quality, reliability, robustness, innovativeness and cost are more and more tight and high. Thus, product designer must ensure that the designed product meets fully the requirements of customers and users as well. In other words, satisfaction of these plays an important role in the context of design product-process. The research work presented in my thesis is a complete answer for management of geometrical variations throughout the product life cycle. In fact, the geometrical deviation model introduced in my thesis allows to model geometrical deviations generated from the manufacturing to assembly stage of the product life cycle. Monte-Carlo simulation method is then used to generate an image of the real manufactured product. As a result, the geometrical deviations are integrated into simulation of product performance in order to establish the relationship between the performance and the parameters of geometrical deviations or variation sources. An image of the real performance of the manufactured product is generated by using the result of geometrical deviations simulation. From the result of performance simulation, the parameters of variation sources influencing the product performance are identified and classified according to their impact level. The variance of the product performance variation is established by two different approaches based on the relation between the performance and the parameters of geometrical deviations or variation sources. Finally, the robust design solution can be found by minimization of the variance of the product performance variation. Keywords: Life-cycle Engineering, Geometrical Deviation Model, Performance simulation, Manufacturing simulation, Geometrical variability management.