Blue
=> displacement (in); Red => force (lbf)
~ 4100 lb on the bolt, near failure point
DAQ
with the analog output using
LabView & plotted on Excel,
1
data per 0.001" displacement
Tensile
Strength of grade 5 bolt (N ~ 90)
from McMaster Carr, Su min. = 120 kpsi
Broke
a box of bolts (N ~ 90).
SAE
Grade 5 bolts, Su min. = 120 kpsi (99% of
the fasteners need to exceed this value).
You design against the weakest fastener, not
against the average (~132 kpsi for this batch).
