plastic deformation plastic deformation deformation Plastic deformation en elastic and plastic deformation plastic deformation Deformation deformation deformations deformation Deformation (engineering) reason elastic elastic deformation deformation deformed deformation deformation Deformation Deformation (engineering) elastic and plastic deformation elastic and plastic deformation elastic deformation deformable deformation elastic and plastic deformation deformed deformed plastic deformation deform plastic deformation en elastic deformation Deformation elastic deformation overstretch plastic deformation deformation elastic deformation Deformation deformed deformation deformable Deformation elastic deforming English elastic deformable deformations deformation elastic and plastic deformation deformed plastic deformation elastic deformation deformation elastic and plastic deformation deformation deformed deformation deform deformation