Advances in Material Forming and Joining: 5th International by R. Ganesh Narayanan, Uday Shanker Dixit

By R. Ganesh Narayanan, Uday Shanker Dixit

This edited ebook includes prolonged learn papers from AIMTDR 2014. This contains fresh study paintings within the fields of friction stir welding, sheet forming, becoming a member of and forming, modeling and simulation, effective prediction options, micro-manufacturing, sustainable and eco-friendly production concerns and so on. this can turn out necessary to scholars, researchers and practitioners within the box of fabrics forming and manufacturing.

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Extra resources for Advances in Material Forming and Joining: 5th International and 26th All India Manufacturing Technology, Design and Research Conference, AIMTDR 2014

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In particular, a sort of distortion is also obtained, generating a curvature on the expected straight sides. This phenomenon is due to elastic spring back whose effect is lower in correspondence of the edges, where the geometrical stiffness is higher than in other areas (Cerro et al. 2006; Filice et al. 2002; Ham and Jeswiet 2007). The results obtained in geometric accuracy measurements with the process model, as compared to experimental results obtained by testing in the CNC machine, are approximately same (Cerro et al.

16 Force prediction in Z-direction 41 42 Y. Kumar and S. , the stresses increase with respect to time. This is obvious due to the strain hardening. Figure 13 shows the evolution of effective strain during the process, which is increasing with time. The forming forces in X- and Y-direction are repetitive in nature. The forces in X- and Y-directions were also increased gradually. As the tool moves in Z-direction, the deforming force in Z-direction is found increasing. The force predicted in X-, Y-, and Z-directions are represented in Figs.

E1 for high inlet temperature, low reduction, and low exit velocity and E2 for low inlet temperature, high reduction, and high exit velocity. The sensitivity of error in temperature with respect to error in the estimation of material parameters, viz. r0 ; n; b; c and equivalent Coulomb coefficient μ, is estimated. This information helps in deciding the permissible errors in r0 ; n; b; c and μ. The convergence criteria can be chosen accordingly. E1 and E2 for the inversely determined parameter along with ±5 % material and process parameters variation are listed.

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