Strain calculated from elastic parameter of vertical cylinder
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A graph of deformation  versus applied force . The straight segment is the linear region where Hooke’s law is obeyed. The slope of the straight region is . For larger forces, the graph is curved but the deformation is still elastic— will return to zero if the force is removed. Still greater forces permanently deform the object until it finally fractures. The shape of the curve near fracture depends on several factors, including how the force is applied. Note that in this graph the slope increases just before fracture, indicating that a small increase in is producing a large increase in near the fracture.
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