FEA of Mountain Bike Frameby:

Alfred Munoz

Outline

• Forces from static load (case1)

• Results (disscusion)

Forces from static case 1

Material is CU92 aluminum

Forces from static case 1 Weight Distribution

70 percent 30 percent

Forces from static case 1 (71)X

yX-comp Y-comp

378.5 N 130.34 N

30 percent of 300lb400.35 N

TBTT

TT=117343.2 Nmm(Torque at top)

TB =101717.336Nmm(Torque at bottom)

Forces from static case 1 (72)

x 70 percent 300 lbs(1334.5 N) equals 934.15 N

X-comp=705.01N

Y-comp=612.86 N

D=860

mm

Forces from static case 1

y

x

Y-comp=412.38 N

X-comp=1269.18 N

Force from a 300 lb rider

(1334.5 N)

D=203m

m

Results of FEA

Results of FEA

Areas of concern

Results of FEA

Results of FEALess stress in the middle

Therefore room for optimization of material thickness

Results of FEA

Results of frame

FEA ResultsArea of symetrical stress on the top tube

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

Questions