Towards a Method for Early Evaluations of Sheet Metal Assemblies

Dahlström, Stefan; Söderberg, Rikard

doi:10.1007/978-94-017-1691-8_28

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…Liu and Hu 2,3 presented a mechanical model to simplify assembly parts as one-dimensional (1D) cantilevered beams and derivate in-plane distortion formula of assembly joints with linear mechanics theories. A structural model proposed by Dahlstrom and Soderberg 4 is applied on early evaluation of conceptual assembly design based on a hierarchical product description and constraint decomposition. Contrarily, Cai et al 5 presented digital panel assembly methodologies to predict assembly dimensions with operational assembly process simulation.…”

Section: Introductionmentioning

confidence: 99%

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

Wang

Hou

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part B:

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Dimensional variation in aircraft panel assembly is one of the most critical issues that affect the aerodynamic performance of aircraft, due to elastic deformation of parts during the positioning and clamping process. This article proposes an assembly deformation prediction model and a variation propagation model to predict the assembly variation of aircraft panels, and it derives consecutive three-dimensional 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.

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Section: Introductionmentioning

confidence: 99%

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

Wang

Hou

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…Using a similar cycle for the automobile body assembly, Hu et al (2001) presented a new simulation procedure for variation analysis by combining the contact and interaction analysis between parts with FEM. Dahlstrom and Soderberg (2001) presented a method based on structured, hierarchical product description and constraint decomposition for early evaluation of potential flexibility related geometry problems.…”

Section: Introductionmentioning

confidence: 99%

Prediction of geometrical variations in Airbus wingbox assembly

Saadat

Sim

Najafi

2007

Assembly Automation

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If you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation. AbstractPurpose -This paper aims to present a method for predicting dimensional variation in assembly processes of a wingbox structure concentrating on the assembly of skin panels to rib feet. Design/methodology/approach -Finite element modelling and experimental tests are conducted on the rib structure based on the site measurement gathered from the Airbus assembly factory. Findings -The results have shown that the simulated model has the capability of predicting to an acceptable degree of accuracy the overall geometrical variations of the ribs and skin panels, as well as the positional variations of each individual rib foot. Originality/value -The authors believe that no previous research has offered a similar prediction method for large aerostructures.

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3D Manufacturing Tolerancing with Analysis Line Method Taking into Account Joining Operations During Manufacturing Process

Royer

Anselmetti

2016

Procedia CIRP

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International audienceIn the aeronautic field, parts need many phases of machining and joining. The presentation proposes to apply analysis line method on manufacturing transfer. This method realizes both specification synthesis and tolerance analysis. The major contribution is a set of rules which make possible to calculate a three-dimensional transfer in the case of braze welding operations. For each functional requirement, the conditions are expressed as sets of linear relations on production deviations, from blank parts to finished part. These relations allow specification of blank parts, machining phases and braze welding phases. The method is applied on a part from Snecma

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Towards a Method for Early Evaluations of Sheet Metal Assemblies

Cited by 3 publications

References 4 publications

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

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

Prediction of geometrical variations in Airbus wingbox assembly

3D Manufacturing Tolerancing with Analysis Line Method Taking into Account Joining Operations During Manufacturing Process

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