Proposal and use of a void model for the simulation of ductile fracture behavior |
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| Affiliation: | 1. Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China;2. Faculty of Land Resource Engineering, Kunming University of Science and Technology, 650500 Kunming, China;1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei 066004, PR China;2. College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, PR China;3. Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, PR China;1. Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region & Heilongjiang University, Harbin, 150080, Heilongjiang Province, China;2. Jiaxiang Industrial Technology Research Institute of Heilongjiang University, Jining, 272000, Shandong Province, China |
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| Abstract: | A ductile fracture model derived from a microscopic point of view is proposed and is proved to be effective in the analysis of multipass drawing. First, a method of predicting ductile fracture is proposed using a model from a microscopic point of view. The relationship between the void volume fraction and the strain to fracture, calculated from the model, agrees well with the relationship obtained from the Thomason model. Next, the analysis and experiment of multipass drawing are performed using various reductions in area and die angles. The inner diameter of the die at which the material fractures and the material density distribution in the radial direction, calculated from the analysis, agree with those obtained from the experiment. Finally, a simulation of drawing at the die at which the material fractures is performed and inner fracture defects are observed to appear periodically in the drawing direction. |
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