Flexibility of different materials.
Questions tagged [flexures]
11 questions
6
votes
1 answer
What is this kind of bearing called
I came up with this concept for a partial rotation, lubricant free, low friction bearing for a robotics application. Two complementary sets of tensioned tendon-like cables (or tapes) serve both to constrain the degrees of freedom of the joint as…
jms
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4 answers
Why are many compliant mechanisms only flexible in the joints?
I've been playing around with 3D printing some compliant mechanisms, mostly to get precise linear motion, and I've noticed that many commercial compliant mechanisms are often designed like this:
Where the flexible parts are only thin by their…
Beacon of Wierd
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4
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Is an Adjustable Stiffness Flexure Spring possible?
I have recently discovered flexure springs (see image below), and I am interested in using one in an amateur project I am building.
However, I would prefer if I am able to adjust the "stiffness" of the flexure spring, to allow the spring to bear…
Homunculus Reticulli
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Is there a bellows geometry that allows for torsional motion?
A typical folded bellows allows for axial expansion/compression, lateral offset, and angular deflection. Is there a bellows fold pattern that can accommodate a relatively large torsional rotation about the longitudinal axis?
Motivation
I'm looking…
scottbb
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3 answers
Does Bending Stress Affect Natural Frequency?
I have been researching about the factors that affect natural frequencies, particularly about the effects of stresses.
Most of what I have found only discusses compressive and tensile stresses though, that they decrease and increase the natural…
Xyzar
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Can strength be expressed in a single value? Can flexibility?
I'm trying to communicate information about the strength and flexibility of certain materials to laymen. Are there any recognised proxies for strength and flexibility?
I've tried:
$$\text{Strength Proxy} = \sqrt {\text{Tensile Strength} *…
Andrew
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Design of multiple wood layers
I am currently working on designing a teeterboard for the circus (a seesaw that people jump up and down on the ends), and need some advice on my methodology for wood selection. The primary wood will be Vic ash (a.k.a Tasmanian Oak), with a possible…
Jonathan Carver
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Calculating the required dimensions of horizontally-oriented weight-bearing beams
In the image is a design for a chemical etched piece of metal. Shown in white are holes formed in a sheet of metal, which is shown in grey. Highlighted in the red circle is one of four sections that connect the circular shape in the centre to the…
EddieP
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A durable rubber type material that can flex easily but return to its original shape very fast
I'm looking for a durable rubber type of material for a guitar pick holder. The material I'm looking for will need to have flexibility to pick individual notes of a guitar, but needs to return to its original shape/position as fast as possible for…
Marc P
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Can the general Flexural formula be used in the case of transverse loading of a beam?
The general derivation of the Flexural formula uses the pure bending case, where the distance from a curved section to the neutral axis is assumed to be constant even after bending, denoted by y. The Flexural formula, as we all know, is used to…
Rameez Ul Haq
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Flexure Deflection - Both ends fixed (one translation free)
I have a flexure problem. One of its ends is fixed to a frame (say F1) which is stationary (no rotation & no translation) and the other end is also fixed to another frame (say F2) which can move in translatory motion (rotation fixed & translation…
