Plasticity Model of Extruded Peanuts under Mechanical Pressing

Abstract:

The experiments for stress—strain and confined pressing of granular peanuts by uniaxial pressing were carried out. The results show that granular peanuts conform to the model of three power curve. By using of Kuhn`s yield criterion, plasticity constitutive equations of granular peanuts were developed. The model parameters were determined from experimental stress—strain curve using an inverse method. The maximum relative deviation between the measured and the simulated value of strain is 5.4%, and the average relative deviation is 3.5%. Results indicated that the plasticity constitutive equations can describe the plastic deformation for extruded peanut, and Kuhn`s yield criterion can be used as theoretical basis for plasticity model of granular peanuts.

• Periodical: Applied Mechanics and Materials (Volumes 55-57)
• Pages: 20-25
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.55-57.20
• Online since: May 2011
• Authors: Xiao Zheng, Ya Xin Zhang, Guo Xiang Lin, Zhi Xian Sun
• Keywords: Constitutive Equation, Peanut, Plasticity Model, Yield Criterion

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