Aerowerx
Well-Known Member
I just found this paper on Composite Design Practices.
PDF page 4 contains these statements:
A 0 degree/90 degree stacking. This arrangement bends under pure tension because the modulus-weighted centroid is not coincident with the geometric centroid, resulting in an offset load path.
sketches show how simple loads result in unusual deformations because of coupling action. With balance and symmetry present, these effects disappear
(arrgh! can't remove indent for some reason. Anyway...)
I thought these were interesting pictures. The 0/90 stack is shown bending in only one direction. It leads me to believe that a 0/90 stack is best for landing gear legs???
Edit: I think theoretical concepts are easier to grasp when there is a clear picture.
PDF page 4 contains these statements:
A 0 degree/90 degree stacking. This arrangement bends under pure tension because the modulus-weighted centroid is not coincident with the geometric centroid, resulting in an offset load path.
sketches show how simple loads result in unusual deformations because of coupling action. With balance and symmetry present, these effects disappear
(arrgh! can't remove indent for some reason. Anyway...)
I thought these were interesting pictures. The 0/90 stack is shown bending in only one direction. It leads me to believe that a 0/90 stack is best for landing gear legs???
Edit: I think theoretical concepts are easier to grasp when there is a clear picture.
