With the risk of using slightly incorrect terms:
How do you calculate the shear load, considering how far an object protrudes and how high it is?
An example to illustrate:
A shelf is 80 cm high and 20 cm deep. Two mounting points at the top of the shelf. On the shelf, I place an object weighing 10 kg. What will the load be on each mounting point?
Can someone describe how this is calculated?
How do you calculate the shear load, considering how far an object protrudes and how high it is?
An example to illustrate:
A shelf is 80 cm high and 20 cm deep. Two mounting points at the top of the shelf. On the shelf, I place an object weighing 10 kg. What will the load be on each mounting point?
Can someone describe how this is calculated?
You can see it as a lever arm hinged at the bottom edge of the shelf. If the object is positioned in the middle of the shelf, its center of gravity is 0.1 m from the wall. The torque around the bottom edge of the shelf against the wall will be m * g * L. m = 10 kg. g = 9.81 m/s². L = 0.1 m. 10 * 9.81 * 0.1 = 9.81 Nm. The pull out from the wall at the attachment points then becomes the torque divided by the shelf's height. 9.81 Nm / 0.8 m = 12.3 N distributed over the two attachments. Strictly speaking, the shelf's own weight must also be taken into account.