Cantilever Hinge End Loading
Cantilever Hinge End Loading
(OP)
Hi,
Possibly a simple analysis:
I have a hinged cantilever support (see pic) supporting a 5032 N end load. The 45deg support strut experiences a 7117N tensile load and I have sizes this to suit.
My question, lies at the hinge pin. What forces will this hinge pin experience? I presume it will be the vertical load along with some horizontal component.
Will the bending moment of the beam effect this?
The hinge will be mounted in double shear so as to reduce the load on the pin.
The entire design is for a folding platform.
I appreciate all input.
Thanks.
Possibly a simple analysis:
I have a hinged cantilever support (see pic) supporting a 5032 N end load. The 45deg support strut experiences a 7117N tensile load and I have sizes this to suit.
My question, lies at the hinge pin. What forces will this hinge pin experience? I presume it will be the vertical load along with some horizontal component.
Will the bending moment of the beam effect this?
The hinge will be mounted in double shear so as to reduce the load on the pin.
The entire design is for a folding platform.
I appreciate all input.
Thanks.





RE: Cantilever Hinge End Loading
Now you have the problem of how to provide adequate structure to support the forces from the vertical cantilever and from the horizontal strut. There will be about 6 kNm of bending on the vertical cantilever, and this along with a bit due to the eccentricity of the vertical member has to be resisted by the beam, I assume in torsion. A wide flange section as you show is not much good in torsion.
RE: Cantilever Hinge End Loading
RE: Cantilever Hinge End Loading
RE: Cantilever Hinge End Loading
-handleman, CSWP (The new, easy test)
RE: Cantilever Hinge End Loading
The vertical cantilever is a support post. (100x100mm box to be precise) I have calculated the max. deflection and bending stresses in this due to the 5032N force acting on this.
I realise that the wide flange section is not much good in torsion, but for the loading involved and the flange size, this is of little concern. I might consider adding stiffeners to the rear of the vertical cantilever at the base to distribute the load over the flange.
The pin I am concerned with is the pin at the base of the post hinging the platform and not the pin(s) at the diagonal strut.
I assume this pin would experience a vertical load?
I realise that a uniform load would be more realistic but I am calculating a worst case scenario situation here.
RE: Cantilever Hinge End Loading
-handleman, CSWP (The new, easy test)
RE: Cantilever Hinge End Loading
-handleman, CSWP (The new, easy test)
RE: Cantilever Hinge End Loading
now a free body of the outer end of the beam, where the load is applied ... clearly the beam is in compression (5032N). thus the pin you're interested reacts only transverse load.
i'd also analyze the column, but the critical section looks to be at the base.
BUT, as handleman is trying to tell you, if the 5032N load is distributed over the length of the beam, then the answer, as far as the pin is concerned, is completely different. if you've assumed a pinload at the remote end is conservative, it is conservative as far as the reaction at the base of column is concerned; but it may be unconservative as far as the beam and pin are concerned.