rcohn
Guest
Missing reference from previous post, Kinsler and Frey, Fundamentals of Acoustics, J. Wiley and Sons 1962 page 77.
The change in stiffness due to snorkel curvature really should not matter in diving, but here is information the changes in bending with a curved beam anyway, from Roark and Young, Formulas for Stress and Strain, 5th ed., McGraw Hill, 1975. Chapter 8 "Curved Beams" page 209.
Ralph
The change in stiffness due to snorkel curvature really should not matter in diving, but here is information the changes in bending with a curved beam anyway, from Roark and Young, Formulas for Stress and Strain, 5th ed., McGraw Hill, 1975. Chapter 8 "Curved Beams" page 209.
When a curved beam is bent in the plane of initial curvature, plane sections remain plane, but because of the different lengths of fibers on the inner and outer sides of the beam, the distribution of stress and strain is not linear; the neutral axis therefore does not pass through the centroid of the section and Eqs. 1 and 2 of Art. 7.1 do not apply. The error involved in their use is slight as long as the radius of curvature is more than about ten times the depth of the beam, but it becomes large for sharp curvatures.
Ralph