Download 60 Excellent Inventions in Metal Forming by A. Erman Tekkaya, Werner Homberg, Alexander Brosius PDF

By A. Erman Tekkaya, Werner Homberg, Alexander Brosius

60 novel methods in steel forming are provided and defined intimately. Contributions from said overseas scientists representing the state-of-art in steel forming open a basic view on fresh effects and a transparent view on calls for for brand spanking new examine initiatives.

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Plane stress yield function for aluminum alloy sheets–Part I: Theory. Int. J. Plasticity 19, 1297–1319. 5. , 2007. On linear transformations of stress tensors for the description of plastic anisotropy. Int. J. Plasticity 23, 876–896. 6. , 1989. Plastic behavior and stretchability of sheet metals. Part I: A yield function for orthotropic sheets under plane stress conditions. Int. J. Plasticity 5, 51–66. 7. , 2005. Linear transformation-based anisotropic yield functions. Int. J. Plasticity 21, 1009–1039.

Bong 6 Conclusion This brief summary describes the principles guiding the development of a plasticity theory for anisotropic metals. The derivation of the constitutive equations is consistent with considerations and simulation results of lower scale crystal plasticity. Consequently, microstructural information is included, albeit, in an approximate manner, in this approach. The corresponding anisotropic yield functions are simple enough to be conveniently used for the optimization of sheet metal forming processes in industry.

45 %C steel after shperoidizing annealing a Static testing machine and mechanical press, b Mechanical presses with different speeds As the present method assumes that the average values of flow stress and strain in a non-uniformly deforming specimen are identical to those of the uniformly deforming specimen, this method provides a reasonable result only when the flow stress curve is smooth. Fortunately the flow stress curves do not have sudden changes under the cold forging conditions, and thus good coincident was obtained.

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