Geometry Assurance Integrating Process Variation With Simulation of Spring-In for Composite Parts and Assemblies

Copyright © 2016 by ASME.Geometrical variation and deviation in all the manufacturing processes affect the quality of the final product. Therefore, geometry assurance is an important tool in the design phase of a new product. In the automotive and aviation industries where the use of composite parts is increasing drastically, new tools within variation simulations are needed. Composite parts tend to deviate more from nominal specification compared to metal parts. Methods to simulate the manufacturing process of composites have been developed before. In this paper, we present how to combine the process variation simulation of composites with traditional variation simulations. The proposed method is demonstrated on a real complex subassembly, representing part of an aircraft wing-box. Since traditional variation simulation methods are not able to capture the spring-in and the special deviation behavior of composites, the proposed method adds a new feature and reliability to the geometry assurance process of composite assemblies.

[1]  Lars Lindkvist,et al.  Variation Simulation of Sheet Metal Assemblies Using the Method of Influence Coefficients With Contact Modeling , 2007 .

[2]  Jaime A. Camelio,et al.  Modeling Variation Propagation of Multi-Station Assembly Systems With Compliant Parts , 2003 .

[3]  Rikard Söderberg,et al.  Including Assembly Fixture Repeatability in Rigid and Non-Rigid Variation Simulation , 2010 .

[4]  J. C. Simo,et al.  On stress resultant geometrically exact shell model. Part I: formulation and optimal parametrization , 1989 .

[5]  Carolyne Albert,et al.  Spring-in and warpage of angled composite laminates , 2002 .

[6]  Wing Kam Liu,et al.  Nonlinear Finite Elements for Continua and Structures , 2000 .

[7]  Rikard Söderberg,et al.  Variation Simulation for Composite Parts and Assemblies Including Variation in Fiber Orientation and Thickness , 2014 .

[8]  Ben Wang,et al.  Assembly dimensional variation modelling and optimization for the resin transfer moulding process , 2004 .

[9]  Rikard Söderberg,et al.  Managing physical dependencies through location system design , 2006 .

[10]  A. Ibrahimbegovic.  Stress resultant geometrically nonlinear shell theory with drilling rotations - Part I : A consistent formulation , 1994 .

[11]  S. Jack Hu,et al.  Variation simulation for deformable sheet metal assemblies using finite element methods , 1997 .

[12]  J. Reddy.  Mechanics of laminated composite plates and shells : theory and analysis , 1996 .

[13]  Krishan K. Chawla,et al.  Composite Materials: Science and Engineering , 1987 .

[14]  Rikard Söderberg,et al.  Computer Aided Assembly Robustness Evaluation , 1999 .

[15]  Rikard Söderberg,et al.  Tolerance Simulation of Compliant Sheet Metal Assemblies Using Automatic Node-Based Contact Detection , 2008 .

[16]  Ivana K. Partridge,et al.  Investigation of cure induced shrinkage in unreinforced epoxy resin , 2002 .