Question

What term refers to the breaking stress that will cause permanent deformation or fracture of a material?

Answer 1

tensile strength

makes it clear that the deformation is proportional to the applied force. Figure 5.13 shows the Hookes law relationship between the extension L of a spring or of a human bone. For metals or springs, the straight line region in which Hookes law pertains is much larger. Bones are brittle and the elastic region is small and the fracture abrupt. Eventually a large enough stress to the material will cause it to break or fracture. Tensile strength is the breaking stress that will cause permanent deformation or fracture of a material. Hookes Law.