Auto/Steel Partnership - American Iron and Steel Institute

European Method of Relative Deflections
Where,
K b = P/Äz c
Δz c = Δz – Δz g
Δz g = Δz trans – Δz rot
z g = z trans + Δz rot
z trans = Äz F
Δz rot = (x - x F ) è = (x – x F )* (Δz R - Δz F )/ ( x R – x F )
P = Total Force (Full Model)
LIGHTWEIGHT FRONT END STRUCTURE
Phase I Final Report
Design Space
Δz F = Z displacement at front rail with an X coordinate equal to that of
the front strut tower center .
Δz R = Z displacement at rear rail with an X coordinate equal to that of
the rear spring seat center.
x = X coordinate of the point on the node set in the longitudinal
direction where Z displacement is maximum.
x F = X coordinate of F
x R = X coordinate of R
Additional load cases for low and mid-speed bumper assessment are
detailed in the section - Bumper Design [4].
Auto/Steel Partnership
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