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Elastic-plastic Fracture Mechanics Behavior of Graphite

4 Elastic-plastic Fracture Mechanics Behavior of Graphite [Pg.497]

Griffith derived his relationship for glass where R consists only of surface energy. In the case of metals, R is mainly plastic energy associated with the formation of a crack tip plastic zone. It is obvious from Eq. 9 that, for plane stress, [Pg.499]

That fraction of the applied work which is not consumed in the elastic-plastic deformation remains to create the new crack surface, i. e., the crack driving force. Therefore, a nonlinear fracture toughness,, may be defined as follows  [Pg.499]

The difference between the work input and the elastic stored energy is the crack growth resistance, R, [Pg.500]

As with the purely elastic case, the energy values associated with elastic-plastic fracture may be ascertained from the load versus load-point deflection diagram for a cracked body as shown in Fig. 5. [Pg.500]


See other pages where Elastic-plastic Fracture Mechanics Behavior of Graphite is mentioned: [Pg.497]    [Pg.531]    [Pg.20]    [Pg.518]    [Pg.552]    [Pg.497]    [Pg.531]    [Pg.565]   


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