By A. Erman Tekkaya, Werner Homberg, Alexander Brosius
60 novel ways in steel forming are provided and defined intimately. Contributions from stated overseas scientists representing the state-of-art in steel forming open a basic view on contemporary effects and a transparent view on calls for for brand new learn initiatives.
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Extra resources for 60 Excellent Inventions in Metal Forming
S/ represents any isotropic or anisotropic homogeneous yield function of first degree as discussed in the previous sections. A number of state variables were introduced in this O but the foundation of the present theory of constitutive equation, including f1 , f2 and h, plasticity for anisotropic materials as well as the homogeneity and convexity of the yield function are preserved. 48 F. Barlat and H. J. Bong 6 Conclusion This brief summary describes the principles guiding the development of a plasticity theory for anisotropic metals.
1007/978-3-662-46312-3_3 17 18 H. Traphöner et al. 2 Process Idea The in-plane torsion test is a process for material characterization under simple shear load. It was first introduced by Marciniak and further developed by Tekkaya et al. [5, 6]. Figure 1a illustrates the principle of the test. A circular specimen is internally and externally clamped concentrically. By fixing the internal and rotating the external clamping device, an elastic and plastic deformation in the annular region between the clampings occur.
The active surface of contactor (the surface that will come in contact with specimens) is the original tool surface (Fig. 4). A hole is machined beneath active surface to place a heating cartridge. Contactor surface can be heated up to 300°C. The specimen is fixed on the moving part of a tensile testing machine. Specimens can be heated by induction up to 1200°C. Friction Analysis in Bulk Metal Forming 25 Fig. 2 Schematic view of the friction test Fig. 3 Contactor stand with integrated load cell Fig.
60 Excellent Inventions in Metal Forming by A. Erman Tekkaya, Werner Homberg, Alexander Brosius