Rating
Axial Stiffness
Axial Stiffness
can some please explain to me what axial stiffness is.?
also could you explain how you can determine what beam has highest axial stiffness without calculations
Axial stiffness is an object’s resistance to being compressed or elongated by an axial force. When you pull a rope in a tug-o-war, the rope will stretch to a slightly longer length depending on its axial stiffness. One of the two easiest ways to know axial stiffness without doing calculations is to find the largest cross-section you can. In the tug-o-war example, the thicker the rope, the higher the axial stiffness, the less it stretches. The other way is to pick a material that has a high modulus of elasticity. In the above tug-o-war example, if you replace the rope with a cable made of wound steel, then the rope will have very high axial stiffness.
The axial stiffness is given by A*E, where A is the cross sectional area of the object, and E is the modulus of elasticity (which depends on the material the object is made of)
Resistance to bending, however, is characterized by BENDING stiffness. And it has to do with the size of the cross section, but also with the shape. It’s not as simple to determine as axial stiffness.
This is given by I*E, where I is the moment of inertia of the cross section, and E is the modulus of elasticity.
Resistance to twisting, however, is characterized by TORSIONAL stiffness. It has to do with the the size of the cross section, but more importantly, its shape in a radial direction. This is also not as simple to determine as regular axial stiffness. It is given by J*E, where J is the polar moment of inertia of the cross section.
Hope it’s not too textbook for you
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The Strength And Stiffness Of Steel Under Bi-axial Loading $11.04 This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continu… |
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