ELI5: Explain Like I'm 5

Stiff diagram

A stiff diagram is like a map that shows how much a material or structure can bend and twist without breaking. Imagine if you had a stick made of soft clay - you could bend and twist it easily without snaping it. But if you had a stick made of hard plastic, it would be much harder to bend and twist without breaking it. That's like a stiff material.

Now, imagine if you had to build a tall building or a bridge. You need to make sure that the materials you use are not too stiff or too flexible - just the right amount of stiffness. That's where the stiff diagram comes in handy. It helps you to choose the right materials for your structure or design.

The diagram shows how the material responds to force, such as weight or pressure. It shows where the material will bend, twist or break under certain conditions. This helps engineers and architects to make informed decisions on what materials to use and how to design stronger, more durable structures. So, in simpler terms, a stiff diagram is like a map that helps people who build things choose the right materials so that their structures won't break or fall apart.