1Material and layup
Layup
2Bolt pattern
Rows
Columns
3Specimen
4Fastening
Shear
5ExamplesChoose a starting point
Advanced
Ply thickness
Hole clearance µm
Loose row
Equations and sourcesModels and sources
Bolted joint
Which bolt works hardest, and how does the hole fail?
Each bolt bears on its hole, and the laminate can crush ahead of a bolt, break across a row or shear out to its end.
Choose a pattern on the left, then select Run test.
The test
ElasticLoad
Load–displacement
Failure index
More plots
Mostly passing load: the hole fails like an open-hole test. Mostly bearing: it crushes. Row 1 has both, so it usually breaks in net tension.