Load-elongation curve

A load-elongation curve shows how a material stretches when a force (load) is applied. Initially, as you pull, the material stretches easily; this is the elastic region where it can return to its original shape. As the force increases, the material stretches more, but may begin to deform permanently or weaken. The curve helps identify the maximum load the material can handle before breaking and reveals its flexibility and strength. It’s a useful way to understand how materials behave under stress, ensuring they’re suitable for specific uses in engineering and construction.