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Unformatted text preview: % elongation applied on size of uncertainty zone). It is worth noting that torsor based uncertainty models also use first order linearization for their computations. PLM phases (inverted) Production conditions No load Normal temperature Analysis Clearance at assembly (no load & temperature) Operation conditions Design requirements in operation Requirements Clearance in operation (load & temperature) Design Design requirements at assembly Requirements Dimensions & clearance at assembly Load Operation temperature Synthesis Uncertainties on parts and subassemblies Computations Compensation 1) Strains in operation 2) Nominal dimensions in operation Shifted dimension values at assembly Figure 3; Product requirements from operation to assembly conditions. Geometrical Variations Management 83 From there, compensated dimensions and uncertainties are fed to an analysis model, such as the Jacobian-torsor, therefore providing a corresponding clearance value at assembly. The uncertainti...
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