What are some forces that a material can experience?

Tension

Tension is when something is stretched, lets say a piece of glass is being stretched it would just shader that is something that is not stretchable. There are many types of metal some can stretch so that is something that is stretchable.

Compression

Compression is when something is squished, lets say a piece of plastic is being forced from both sides it would squish because it is not a completely solid material. Lets say a piece of ice is being squished it would just shader because it is a completely solid material.

Bending

Bending is when something can be shaped by being flexible, lets say are trying to break a twig it will just snap this is because it is not flexible, but if you made a metal very hot it will be able to bend.

Torsion

Torsion is when a material can twist, lets say you have a piece of plastic and you twist it one direction with one hand and the other hand twists the other way it will twist, but if you have a rock it will not because it is an extremely solid object.

Shear

Shear is when something falls over, if you push something tall then it will fall flat but if you have something that is not tall it will not.

What is an i-beam?

An i-beam is one of the strongest types of beams. It is one if the best because of its shape, although you can see them almost every where there are differences between them so that they can do different tasks. The main difference between them and what makes them strong is there “web” it’s the strongest part of the beam:

As you can see this is the shape of an i-beam the web (that’s labeled) is pretty tall, but if you make it taller its more strong maybe you don’t want it to be tall because its not holding wait maybe it’s “holding” tension. Not a problem you can line them up in a way that is more suitable for that job.

What is a truss?

A truss is a beam or bridge made up of triangles. It is used for train tracks and sometimes roads for cars. Its also mostly used for shorter distances. I think that they are very interesting. Something that I didn’t know before was that one side of the bridge is not anchored  so that there is space for compression and tension.