To construct the geometric covariance matrix c is

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Unformatted text preview: m position, with attendant residual stresses. The final shape may have objectionable appearance or aerodynamics and the residual stresses could shorten the fatigue life. A tool that predicts the springback and residual stress in the assembled parts would be of great value to industries that rely on flexible assemblies: aerospace, automotive, electronics, etc. Tolerance and variational analysis methods predict the amount of misalignment that will occur between parts, but cannot predict the amount of springback and stress. Compliant Statistical Tolerance Analysis (CSTA) methods have been developed to predict the amount of springback and residual stress that will occur within assemblies containing compliant parts due to manufacturing variation. Many CSTA methods exist in the literature, employing various variational methods but universally employing finite element analysis (FEA) to account for part compliance. [Liu and Hu, 1997] combine FEA with Monte Carlo simulation and lower the 321 J.K. Davidson (ed.), Models for Computer Aided Tolerancing in D...
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