Stress–strain curve

A stress-strain curve is like a graph that shows how different materials, like steel or rubber, react when they are stretched or pushed. The graph shows us how much the material stretches (strain) when it is pushed (stress). We can use this information to learn how strong a material is and how much it can take before breaking. For example, rubber can take a lot of stretching before breaking, so it will have a flat line at the top of the graph, which means it can keep going even when it is stretched. Steel, on the other hand, will break very easily, so it will have a steep line that stops very quickly when we push it.