Engineering & Analysis Methods > Bolted Joints

BJSFM Analysis General Assumptions

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Stressed:
What are the general assumptions used in the BJSFM analysis

Rocketman007:
For a standard bearing and bypass analysis, the  BJSFM general assumptions include:

a) Pan head fastener  (Csk requires a correction)
b) Infinitely wide panel (E/D and W/D could require a correction)
c) Uniform bolt bearing load (double shear test configuration), (Single shear configuration requires a correction)
d) Finger tight fastener
e) Joint laminate is between 40% and 60% 45 deg plies
f) Do default = 0.016 (Ref MIL HDBK 17), (Do is also user defined)
g) Lamina analysis (pristine allowables)
h) Maximum strain theory (alternate failure options available)

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