The fracture energy can be calculated bydividing the work done for performing the fracture process (the area under the force鈥揹isplacement curve) by the fractured zone area. The area of fractured zone is determined by multiplying the thickness of the specimen by the length of the portion without having a notch, as shown in Fig. 7.8.
People also ask
What is fracture energy and effective length?
The fracture energy and the effective length of the fracture process zone is defined on the basis of the extrapolation to an infinite specimen size, for which the definitions are independent of the shape of the specimen or structure.
How to determine the fracture energy of a material?
112 Z.P. Baiant and M.T. Kazemi law can be exploited to determine the fracture energy of the material merely by measur ing the maximum loads of geometrically similar specimens of sufficiently different size [6-9].
How do you calculate fracture toughness and stress intensity?
The stress intensity is calculated as: where 蟽 is the applied stress, a is the crack length, and Y is a dimensionless geometry factor that is dependent on the crack and part geometry. The fracture toughness is dependent on part thickness.
How does the fracture process zone dissipate energy during an extension?
The fracture process zone becomes detached from the tip and thus its size should remain approximately constant. Consequently, it should dissipate roughly the same amount of energy per unit crack extension.