The article explores how a wide curved bar behaves when bent with a large force, causing both elastic and plastic stresses. The researchers found that when the load is close to the maximum the bar can handle, the displacements and strains are similar to when the bar is only elastic. They also discovered that as the bending force increases, the thickness of the material changes the most when it reaches about two-thirds of its maximum capacity, and then stops changing once the bar is fully plastic.