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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 39616 (08)
- University: Sharif University of Technology
- Department: Mechanical Engineering
- Advisor(s): Movahedi, Mohammad Reza
- Abstract:
- Nowadays, with a constant increase in life expectancy, joints pain and deficiencies have become a major problem and the use of prosthesis is increasing. One of the most important joint in human body is the hip joint which bear a major share of forces in daily activities. Hip joint is a cup-sphere joint with 3 degrees of freedom (DOF). Therefore, design and manufacturing of such prosthesis is very important. The objective of this thesis is to develop the know how for manufacturing of a standard hip prosthesis by hot forging of Ti6Al4V alloy. First a review of kinematics of bones and joints and forces on hip joint is presented, then the proper process for manufacturing of the hip prosthesis is selected based on economical and scientifical reasons. A solid model of prosthesis is prepared static analysis of prosthesis is carried out to find the critical points of stress. Then the mold's holes and perform shapes are designed based on finite element simulations. The prosthesis is made in three hot forging steps to attain the final shape. Finally, metallographic and hardness tests are performed to compare the micro structure of the forged material with those expected from forging simulations and verify the required heat treatments.
- Keywords:
- Hot Forging ; Titanium Alloy 6AL-4V ; Three-Degree of Freedom Robot ; Hip Prosthesis ; Artificial Joint
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