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Definition The phenomenon in which a body together fails to return to its original shape after the applied force is removed is called plastic deformation. How It Is Obtained In a stress-strain graph, the area under the linear region region is called the elastic region while the area under the nonlinear region is called the plastic region elastic region plastic. Whether a body undergoes plastic deformation is determined by the stress value reached by the material below its load. Accordingly if th

Plane stress describes the condition in which stresses are zero along one plane of the material. This situation typically applies to thin plates. Because the thickness direction of the material is much small compared to other directions, no significant stress develops in this direction and it is assumed to be zero (σz = σxz = σyz = 0). Thus, only the stresses in the x and y directions (σx, σy, τxy) are considered. only Importance of Plane Stress In theoretical and numerical calculations, an incr