Fracture Kinetics of Crack Growth pp 23-94 | Cite as
Deterministic fracture kinetics theory and constitutive laws
Chapter
Abstract
Subcriticai crack growth is usually more complex than a sequence of single bond-breaking steps. All mechanisms consist of various processes; and these processes may include diverse steps, each represented by the appropriate expression of the elementary rate constant [1, 3, 4]7*: Obviously, to control crack growth one must first determine the specific combination of steps that compose the mechanism of fracture, and describe these steps in terms of the appropriate rate constants. Fracture kinetics provides the method to achieve this, through the derivation of the constitutive equation that expresses the complex mechanism of crack growth.
$$ {{k}_{i}} = \frac{{kT}}{h}\exp \left( { - \frac{{\Delta G_{i}^{ \ne }\pm {{W}_{i}}}}{{kT}}} \right). $$
(2.1)
Keywords
Stress Intensity Factor Constitutive Equation Crack Growth Rate Crack Front Crack Velocity
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References
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