Applicability of Hyper Elastic Models for the Analysis of Femur Bone
Sridhar Adibhatla1, Satyadevi. A2, N.V. Swamy Naidu3

1Sridhar Adibhatla, Ph.D Scholar, Gitam University, Gitam Deemed to be University, Hyderabad (Telangana), India.
2Satyadevi. A, Professor Head, Department of Aerospace Engineering, Gitam Deemed to be University, Hyderabad (Telangana), India.
3N.V. Swamy Naidu, Assosciate Professor, Department of Mechanical Engineering, National Institute of Technology, Raipur (Chhattisgarh), India.
Manuscript received on 06 June 2019 | Revised Manuscript received on 30 June 2019 | Manuscript Published on 04 July 2019 | PP: 802-805 | Volume-8 Issue-1S4 June 2019 | Retrieval Number: A11480681S419/2019©BEIESP
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Abstract: The femur bone plays a key role in the locomotion activities of human beings. It is the load bearing and load transferring part in the lower extremity of bones. The stress-strain response of femur largely depends on the type of material and its properties. In the present study different incompressible hyper elastic material models (constants) were derived from the uni-axial compression test data (Evans, 1969) performed on both dry and wet femurs using curve-fitting techniques. Two different femur geometries were considered and FE models were developed with neck-shaft angle (NSA) varying from 1100 -1700 and porosity level of 75%. The force on the femoral head was applied at 00 to the vertical axis in the frontal plane. The results of static structural analysis performed with different hyper elastic material models indicated that Ogden 3rd order model is able to predict the stress-strain response of femur in wet condition more accurately and in good agreement with the published experimental results. Also, it was observed that wet femur will have higher stress-strain response due to the presence of moisture and other contents in comparison to dry bone.
Keywords: Femur, Hyper-elastic, Neck-shaft Angle, Porosity, Ogden 3rd order.
Scope of the Article: Mechanical Maintenance