fea analysis documentation
TRANSCRIPT
FEA Analysis
Maria Krutikovawith contributions from Teal Dowd
Background Information
Assumptions
Fixed rear, twist chassis about a fixed point
The Equations
𝐾=𝑃 (𝐿1+2𝐿2 )
tan−1( ∆𝐴
𝐿𝐴)𝑜𝑟 tan−1( ∆𝐵𝐿𝐵
)𝑜𝑟 tan−1( ∆𝐶𝐿𝐶)𝑜𝑟 tan−1( ∆𝐷
𝐿𝐷)
L
θΔ
Torsional Stiffness = Torque per degree
2014 Analysis
Meshed 2014 Chassis
Assumption: all tubes are 1”x .049” thickness!
Total Deformation
Directional Deformation Y-Axis
Maximum Stress
Max Stress significantly under ultimate tensile stressFactor of Safety = 3.5
𝐾=𝑃 (𝐿1+2𝐿2 )
tan−1( ∆𝐴
𝐿𝐴)𝑜𝑟 tan−1( ∆𝐵𝐿𝐵
)𝑜𝑟 tan−1( ∆𝐶𝐿𝐶)𝑜𝑟 tan−1( ∆𝐷
𝐿𝐷)
𝐾=500 (33 )
tan−1( .1148.25 )
𝐾=1736𝑙𝑏∗ 𝑓𝑡𝑑𝑒𝑔
Torsional Stiffness
2015 Analysis
2015 Chassis
Assumption: all tubes are 1”x .049” thickness!
Loads and Boundary Conditions
Total Deformation
Directional Deformation Y-Axis
Maximum Stress
Max Stress significantly under ultimate tensile stressFactor of Safety = 2.5
𝐾=𝑃 (𝐿1+2𝐿2 )
tan−1( ∆𝐴
𝐿𝐴)𝑜𝑟 tan−1( ∆𝐵𝐿𝐵
)𝑜𝑟 tan−1( ∆𝐶𝐿𝐶)𝑜𝑟 tan−1( ∆𝐷
𝐿𝐷)
𝐾=500 (33 )
tan−1( .1128.25 )
𝐾=1768𝑙𝑏∗ 𝑓𝑡𝑑𝑒𝑔
Torsional Stiffness