Science Daily: Frogs and grasshoppers: Why do legendary leapers have different ‘spring’ stiffness?
I'm familiar with the concept of expressing the stiffness of a beam as an equivalent spring stiffness like in the image below: I'm curious if there's a way of doing to rotational analog to this, expressing the resistance of a beam to a rotation as an angular stiffness (akin to replacing it with a torsional spring).
Stiffness (F=Kx) is the extent to which an object resists deformation in response to an applied force. Elastic Modulus (E=Stress/Strain) is a quantity that measures an object or substance's resista...
As far as I can understand, strength is a materials resistance to permanent fracture while stiffness would be resistance to temporary fracture. If possible could I also get a brief explanation of ductility and resistance to fracture, and the differences between all of these.
Materials are usually put into a basket of either being ductile or brittle. Brittle materials usually don't experience plastic deformation whilst ductile materials do. Some materials might then be described as more ductile than others based on some measures and stress conditions like you described. Stiffness is a global phenomenon, and it's a measure of how much deformation (could be non ...
This is the stiffness used in the moment distribution method, and in the structural stiffness matrix of the finite element program. It is sometimes referred to as the " bending stiffness ".
And then there is axial stiffness, but I will leave that unless you guys ask for it? Thus, I have all these methods for computing the stiffness of the members, but the units of stiffness varies, even amongst the same structural elements.