Abstract
Based on the numerical simulation, the deformation characteristics of incremental sheet punching (ISP) of perforated sheet with circular holes was studied. Combined with the experimental results, the feasibility of using the normalized Cockroft-Latham ductile fracture criteria to predict fracture of perforated sheet during the ISP process was verified. On the basis of above, the influence of the geometric parameters of perforated sheet on the formability was studied. The main conclusions are the major strain is much greater than the minor strain at the interval of holes on the side wall of the perforated sheet; the thickness at the short-axis edge of the hole is smaller than that at the long-axis edge obviously; and the maximum value of major strain of perforated plate decreases with the increase of straight diameter center distance ratio. It is feasible to predict fracture of perforated sheet during the ISP process by numerical simulation with normalized Cockroft-Latham ductile fracture criteria.
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This work is supported by Key Technology Research and Development Program of Shandong under Grant No. 2019GGX102023 and the National Natural Science Foundation of China under Grant No. 51205217.
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Li, L., Wang, J. & Zhang, S. Numerical simulation for deformation characteristics and fracture prediction of perforated sheet in incremental sheet punching. Int J Adv Manuf Technol 110, 1415–1427 (2020). https://doi.org/10.1007/s00170-020-05908-4
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DOI: https://doi.org/10.1007/s00170-020-05908-4