Questions tagged [bending]
The bending tag has no usage guidance.
19
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Unusual bending moment at simply supported beam in etabs [closed]
The horizontal beam is simply supported. I have assigned pinned to released the moment at the both ends. However, there's moment spike near the end in ETABS, what's the problem ? I have checked thru ...
3
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3answers
315 views
What are the units used in beam bending equations? Do they matter?
I was just wondering whether or not the standard beam bending equations worked for all units. E.g. imperial and metric etc.
From what I'm guessing it shouldn't really, since once we plug everything in ...
3
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0answers
110 views
How do I EXACTLY calculate the k-factor for metal bending?
Introduction
I've recently started to work with metals and the process of bending them. There is a lot more math involved than I initially thought. All the break press operators just have a ...
0
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3answers
40 views
BMD of the beam joined at intersection
4 beams are supported by the column at one side, another side is jointed together at the intersection. I have assigned UDL of 20 kN/m on all the beams. 2 beams are longer (3m), 2 beams are shorter (2m)...
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3answers
76 views
How many support beams/rods needed for a firewood storage cabinet
I am building a firewood storage cabinet which should support around 100-150 kg of firewood.
The cabinet is made out of wooden boards (...
1
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1answer
65 views
Simple cantilever beam deflection - what is the simplest way to add a damper?
I am looking at a simple cantilever beam deflection:
I understand the general expression for deflection/force would be:
$$y_s = \frac{Fx_s^3}{3EI}$$
$$F_p = \frac{3y_sEI}{x_s^3}$$
If you were going ...
1
vote
1answer
45 views
How does Nonlinear Viscous Damping work? In what way are Viscous Dampers typically nonlinear?
Viscoelastic materials like metal cables/wires/strings/webs/beams can be modeled with a variety of combinations of springs and dampers as described here.
For example, one simple common structure to ...
1
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2answers
99 views
Multiple varying cross section beam with uniform loads
I have the following cantilever beam problem where I need to find the deflection of the tip at P.
I tried to compute the deflection of the beam using Castignliano' s theorem as described in this ...
2
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0answers
12 views
Finding the Shear Center for a Beam with 1 Axis of Symmetry
I am trying to solve this problem of finding the shear center for the given beam and I have found that e = 35.94 mm, however the solution that was shared with me, had the answer of 39.17 mm.
My method ...
0
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2answers
44 views
Can Sheet Metal Be Formed With Bends At Weld Joints?
I understand that a weld, if done properly, is stronger than the base metal. Does this mean that if you have a part that needs to be formed, the bend can be made along the weld? Or is the weld filler ...
2
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0answers
20 views
What is the relation between the angle of a bend along one axis and the length of a face perpendicular to that bend
Sorry if the title doesn't make sense, I just cant think of how to word it so I'm going to be using images to help.
Basically I have a piece of sheet metal that I have bent along one edge to give me a ...
0
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1answer
32 views
Elastic thin hard material with dog nails scratch resistant
Im looking for a an elastic thin material for hinge and running surface for a dog to glue on wood (I would just use wood but i'm afraid it will splinter)
It should be able to bend 45 deg with ease, ...
0
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2answers
138 views
formula for M(x) - Shear Force and Bending Moment Diagrams
I've watched the video "Understanding Shear Force and Bending Moment Diagrams" from "The efficient engineer" and i got a doubt in this exercise
For $4<x<7$ I arrive to $V=-6x+...
2
votes
3answers
133 views
Maximum Shear force in diagram
So here I have a cantilever beam and I have the shear force diagram. When we are talking about the maximum shear force diagram. Should I take 40kN? Or I need to absolute the value and take 60kN. I am ...
1
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1answer
84 views
Stress Concentration Factor – Why a Specific Range?
I was trying to find the stress concentration factor for a specific situation and I found two different resources for it.
Ref: Shigley's mechanical engineering design
Ref: Roark's Formulas for ...
2
votes
3answers
97 views
Failure in Hollow, Thin Beam due to Collapse of Cross Section
I'm having trouble figuring out how to predict the failure of a hollow channel due to bending. If I'm correct, for a beam with a static second moment of area, $I$, the following equation could be used ...
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1answer
534 views
How to plot bending moment diagram from shear force diagram
With conventions that I adopted shown below
I drew roughly the shear force and bending moment diagram of a simply supported beam with concentrated load at the middle. Now while drawing I drew both ...
1
vote
1answer
110 views
Bending stiffness of composite shaft
What is the method to compute the effective bending stiffness "EI" of a composite structure, in this case a shaft (as seen below).
The shaft is hollow with outer radius $r_{o}$, inner radius ...
2
votes
1answer
87 views
Limits of Euler-Bernoulli Beam Theory for Wide Plate in Flexure?
I'm looking for established limits or rules of thumb for the validity/accuracy of Euler-Bernoulli beam equations for particularly wide "beams". For example, a simply supported rectangular ...
