Positioning variation modeling for aircraft panels assembly based on elastic deformation theory

Dimensional variation in aircraft panel assembly is one of the most critical issues that affects the aerodynamic performance of aircraft, due to elastic deformation of parts during the positioning and clamping process. This paper proposes an assembly deformation prediction model and a variation propagation model to predict the assembly variation of aircraft panels, and derives consecutive 3-D deformation expressions which explicitly describe the nonlinear behavior of physical interaction occurring in compliant components assembly. An assembly deformation prediction model is derived from equations of statics of elastic beam to calculate the elastic deformation of panel component resulted from positioning error and clamping force. A variation propagation model is used to describe the relationship between local variations and overall assembly variations. Assembly variations of aircraft panels due to positioning error are obtained by solving differential equations of statics and operating spatial transformations of the coordinate. The calculated results show a good prediction of variation in the experiment. The proposed method provides a better understanding of the panel assembly process and creates an analytical foundation for further work on variation control and tolerance optimization

Design of Sustainable Product Lifecycles

Generating sustainable product life cycles explains the importance of a holistic long-term planning and management approach to reaching a maximum product benefit over the entire life cycle. The paradigm of thinking in product life cycles supports manufacturers in shaping successful products. The book promotes various methods and tools for life cycle management and merges them into an integrated planning approach. In this monograph Europe’s leading academic experts in the field of life cycle management have consolidated their expertise. Readers will learn about different tools and methods for life cycle modelling and digital information support. Industrial examples show how a consistent product data management with closed-loop information cycles enables manufacturers to activate the hidden performance potentials of their products and in their production lines. In this respect Product life cycle design also illustrates the benefits of a networked production including integrated product service systems and innovative business models, and presents methods for evaluating the economic and ecological impacts of life cycle design, highlighting them with practical examples. The book addresses professionals as well as researchers and students from the field of life cycle management. Practitioners and researchers pursuing life cycle excellence will benefit from the comprehensive coverage of methods and various examples from industry