The document presents an analytical method for determining stress distributions in pin-loaded orthotropic plates. The method assumes a rigid pin, clearance between the pin and plate, and a constant coefficient of friction. Numerical results are shown for normal, tangential and shear stresses on the cavity for different composite layups. The method can predict stresses for varying clearances and a perfectly fitting pin. Experimental validation and improvements to contact modeling are recommended.

1. Stresses Around Pin Loaded Holes in Mechanically Fastened Joints By Neville A. Tomlinson, PhD Howard University Washington DC January 2007

4. Schematic of Pin joint pin plate Fig 1.

5. Problem Definition Fig. 2

6. Exaggerated view of deformed hole by rigid pin Fig 3

31. Determination of

32. Determination of

34. Results

36. Results Shear stress for plate A (±45s )