deflection of curved cantilever
deflection of curved cantilever
(OP)
I don't need an exact solution, just a general idea of the behavior.
Given a thin, gently curved cantilever, would deflection differ if the curve was upwards or downwards?
The context is a field-expedient test for fencing blades. The test involves clamping the tang to a tabletop, and hanging a small weight from the tip. If the tip deflects less than one inch, it is judged too stiff to use.
The question is, many fencing blades develop a curve over time as they are repeatedly flexed. Would testing the blade with the curve up or the curve down affect the deflection enough that we should require that all curved blades be tested the same way?
Never mind for now the question of whether a load applied at a right angle is an adequate surrogate for behavior when loaded axially.
Thanks!
Given a thin, gently curved cantilever, would deflection differ if the curve was upwards or downwards?
The context is a field-expedient test for fencing blades. The test involves clamping the tang to a tabletop, and hanging a small weight from the tip. If the tip deflects less than one inch, it is judged too stiff to use.
The question is, many fencing blades develop a curve over time as they are repeatedly flexed. Would testing the blade with the curve up or the curve down affect the deflection enough that we should require that all curved blades be tested the same way?
Never mind for now the question of whether a load applied at a right angle is an adequate surrogate for behavior when loaded axially.
Thanks!






RE: deflection of curved cantilever
btw, i'd've thought that fencing blades were like pool cues ... the straighter the better ?
RE: deflection of curved cantilever
Usually, a blade will be curved no more than 2" out of straight over 35-40" of length. Most of the curvature will be in the last foot.
I figured it would be similar to a straight beam (the chem-e in the group didn't think so), but would there be any effects from work hardening or similar?
I was going to suggest testing a number of curved blades to see. I think I will.
RE: deflection of curved cantilever
my 2c ... but testing is much surer !