Abstract
A rigid-triangle velocity field for combined backward-forward extrusion based on the experiments and the slip-line field is proposed in this paper. The flow separation point in the rigid-triangle velocity field is defined in accordance with the slip-line theory. A formula of minimum upper bound solution for the punch pressure of the combined extrusion is derived. The values from this formula are compared with those from the slip-line solution and with experimental results. The formula of upper bound solution can be used in practice.
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Communicated by Chien Wei-zang.
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Shi-chun, W., Cai-rong, T., Jiang-shui, A. et al. An upper bound solution for the force of combined backward-torward extrusion. Appl Math Mech 3, 873–883 (1982). https://doi.org/10.1007/BF01895342
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DOI: https://doi.org/10.1007/BF01895342