Experimental and Numerical Study of Low Fatigue Cycle Behavior of Magnesium-Lithium Alloy

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Sharifi, Amin | 2020

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 54001 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Farrahi, Gholam Hossein; Kashyzadeh, Kazem Reza
Abstract:
Application of light metals such as Magnesium alloys due to proper mechanical behavior is increasing in industries such as automotive, electronics and so on. In this project, ingot of Mg-9Li-1Zn alloy with 10 mm thickness were produced by casting, then hot rolled at 300oC to reach 2mm thickness. Annealing at 350oC for 3 hours resulted homogenous properties in the final sheet.Study of monotonic and cyclic behavior of Mg-Li alloy by experiments and FE simulation was the goal of this project. Experimental monotonic and cyclic test were carried out in order to obtain the hysteresis loops and cyclic stress-strain curve. The Chaboche constant were extracted from the experimental test and used to simulate the cyclic stress-strain curve. Finally the monotonic and cyclic constants of the alloy were obtained
Keywords:
Chaboche's Constitutive Model ; Finite Element Method ; Cyclic Behaviour ; Hysteresis Behavior ; Magnesium-Lithium Alloy ; Low Cycle Fatigue

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