- #36
UMath1
- 361
- 9
Since a point by definition has virtually no area, the pressure would be infinite, right?
Yes. So the model of a point force is just a limiting approximation. It is not realistic, but if the pressure is relatively high over a relatively small area, then it can be a useful simplifying assumption.UMath1 said:No, the force must be spread across a small area.
Yes, that is the idea. We are modeling the force as a point force and the torque as a point torque.UMath1 said:I think I understand. But wouldn't the location the torque and applied force coincide?
Yes.UMath1 said:Is the location of Tjoint the same as Fjoint, though?
It is not a force, it is a torque (technically a bending moment). It doesn't have a moment arm, the concept is irrelevant for it.UMath1 said:Does it have a zero moment arm?
Tension breaks a beam by pulling it apart. Compression breaks a beam by crushing or buckling. A shear moment breaks a beam by slicing it. A bending moment breaks a beam by snapping it. And torsion breaks a beam by twisting it.UMath1 said:And what is a bending moment?