bjsfm 0.2.4

Bolted Joint Stress Field Model

Bolted Joint Stress Field Model (BJSFM) is a common analytical method used to analyze bolted joints in composite airframe structures. This project ports the original fortran code to pure python code using the underlying theory.

from bjsfm.lekhnitskii import UnloadedHole
a_inv = [[0.1, 0.05, 0.], [0.05, 0.1, 0.], [0., 0., 0.5]]  # inverse a-matrix from CLPT
loads = [100, 100, 50]  # force / unit length
plate = UnloadedHole(diameter=0.25, thickness=0.1, a_inv=a_inv, loads=loads)

# get stresses at four points around hole
plate.stress(x=[0.125, 0., -0.125, 0.], y=[0., 0.125, 0., -0.125])

# plot stresses
from bjsfm import plotting
plotting.plot_stress(plate)

Installation

pip install bjsfm

Documentation

https://bjsfm.readthedocs.io

Features

• [ ] Lekhnitskii’s anisotropic elasticity solutions for loaded (cosine distribution) and unloaded holes

  • [X] stresses

  • [ ] displacements

• [X] Combined bearing and bypass 2D infinite plate stress distribution

• [X] Optional DeJong tension (or compression) bearing correction

• [X] Max strain analysis

Contribute

• Issue Tracker: https://github.com/BenjaminETaylor/bjsfm/issues

• Source Code: https://github.com/BenjaminETaylor/bjsfm

Support

[e-mail]

License

This project is licensed under the MIT license.