PSI - Issue 27

Ikhsan et al. / Procedia Structural Integrity 27 (2020) 101–108

104 4

Ikhsan et al. / Structural Integrity Procedia 00 (2019) 00 – 00

(a)

(b)

Fig. 2. (a) Boundary conditions, and (b) Applied mesh on the implant. .

In this study, the model used was analyzed using ANSYS software. The chosen meshing method was hex dom quad-tri, as shown in Fig. 3. Previously carried out mesh convergence studies to obtain the optimal mesh size. From the convergence study, a mesh size of 2 mm was chosen in this work. 3. Results and discussion For Hip stem with Ti-6Al-4V material, design with many loop fenestration produced the stress which is lesser than others, with a von-Misses stress of 495.46 MPa. The results of the analysis that has been carried out compiled in Table 3. All the models exhibited stress lesser than the yield strength of the material for the loading used. Table 3 shows that stems with slot fenestration design produced smaller deformation than others with deformation 0.54808 mm. Figs. 3 to 5, sequentially shows the von-Misses stresses, deformation, and strain that occurred for Ti-6Al-4V.

Table 3. Static analysis of hip stem with different fenestration using Ti 6A 4Al material. No Stem Material Type Fenestration Total Deformation (mm)

Von-Misses Stress (MPa)

Equivalent Strain (mm/mm)

1

Ti-6Al-4V

Without Fenestration

0.55527

519.72

0.0050138

2

Ti-6Al-4V

With Slot Fenestration

0.54808

518.42

0.0046852

3

Ti-6Al-4V

With Big Loop

0.56621

526.28

0.0049721

4

Ti-6Al-4V

With Many Loop

0.55767

495.46

0.0047563