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초록· 키워드
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In this study, a ductile fracture model derived from a microscopic point of view is proposed and is proved to be effective in the simulation of material forming. 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’s model of internal necking. Next, a new computer program, based on a conventional computer program for the finite-element method, with which the behavior of crack growth after ductile fracture can be analyzed, has been proposed. The condition whereby a material is divided into two materials upon material forming has been simulated by the proposed ductile fracture model and the proposed new computer program. Finally, the simulation of ductile fracture behavior in material forming is performed, and the validity of our proposed model is clarified by comparing the analytical results with the experimental results.
목차
Abstract
INTRODUCTION
METHOD OF ANALYSIS
ANALYTICAL RESULTS
CONCLUSIONS
REFERENCES
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UCI(KEPA) : I410-ECN-0101-2014-550-003335520