1. FEA of Mountain Bike Frame by: Alfred Munoz

2. Outline
Forces from static load (case1)
Results (disscusion)

3. Forces from static case 1
Material is CU92 aluminum

4. Forces from static case 1 Weight Distribution
70 percent
30 percent

5. Forces from static case 1 (71)
X-comp
Y-comp
TT= Nmm
(Torque at top)
TB = Nmm
(Torque at bottom)
378.5 N N TB TT y
30 percent of 300lb N X

6. Forces from static case 1 (72)
D=860mm y x
70 percent 300 lbs( N) equals N
X-comp=705.01N
Y-comp= N

7. Forces from static case 1
X-comp= N
Y-comp= N
D=203mm
Force from a 300 lb rider
( N) y x

8. Results of FEA

9. Results of FEA
Areas of concern

10. Results of FEA

11. Results of FEA Less stress in the middle
Therefore room for optimization of material thickness

12. Results of FEA
Results of frame

13. Area of symetrical stress on the top tube
FEA Results
Area of symetrical stress on the top tube

14. Future work Apply FEA with entire frame
Run more cases with dynamic loading
Model tubes of frame with varying cross-section (thinner in darker blue areas)
Add welding at contacts and add gussets
Perform corrections to Pro-E model with
the cross-section removed from the places where the tubes intersect

15. Questions