A long time ago, I made a cycle headlamp using a Cree MC-E led and an Iris lens from Ledil. Result – a pretty good beam, but it turned out a bit wide for my purposes, and the beam does have a hole in ...

The critical load causing secondary failure of a deep beam by lateral buckling may be calculated by standard methods for those cases in which the beam behaves elastically under the applied load. When, ...

A direct asymptotic integration of the full three-dimensional problem of elasticity is employed to derive a consistent governing equation for a beam with the rectangular cross section. The governing ...