Journal of Bionic Engineering ›› 2019, Vol. 16 ›› Issue (6): 1103-1115.doi: 10.1007/s42235-019-0122-4
Finite Element Analysis of Porous Titanium Alloy Hip Stem to Evaluate the Biomechanical Performance During Walking and Stair Climbing
Sami Emad Alkhatib, Hassan Mehboob, Faris Tarlochan
- 1. School of Mechanical and Chemical Engineering, M050, The University of Western Australia,
35 Stirling Highway, Crawley, Perth, WA, 6009, Australia
2. Department of Engineering Management, College of Engineering, Prince Sultan University, Riyadh, Kingdom of Saudi Arabia
3. Department of Mechanical and Industrial Engineering, College of Engineering, Qatar University, Doha, Qatar
Finite Element Analysis of Porous Titanium Alloy Hip Stem to Evaluate the Biomechanical Performance During Walking and Stair Climbing
Sami Emad Alkhatib, Hassan Mehboob, Faris Tarlochan
- 1. School of Mechanical and Chemical Engineering, M050, The University of Western Australia,
35 Stirling Highway, Crawley, Perth, WA, 6009, Australia
2. Department of Engineering Management, College of Engineering, Prince Sultan University, Riyadh, Kingdom of Saudi Arabia
3. Department of Mechanical and Industrial Engineering, College of Engineering, Qatar University, Doha, Qatar
摘要： Despite the success of cementless hip stem, stress shielding still presents a serious problem leading to bone resorption. Stems in-corporating porous cellular structures represent a promising solution. Therefore, this study validates the finite element models of titanium (Ti) alloy (Ti-6Al-4V) porous stem and effective porous stems. Several effective porous stems with strut thicknesses 0.33 mm –1.25 mm (18% – 90% porosity) under different loading conditions were analyzed. The results of finite element models revealed that changing the load type and porosity affect stress shielding. Climbing loads yield the maximum stress levels while walking loads result in the lowest stresses in the stems. Furthermore, the point load results in the maximum stress shielding and micromotions (?19% to 18%, 40 μm to 703 μm), as compared to walking (?17.5% to 3%, 35 μm to 242 μm) and climbing loads (?7% to 1.6%, 30 μm to 221 μm). Finally, effective porous stems of strut thickness 0.87 mm exhibit the lowest stress shielding signals (<5%) under all loading conditions.