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Erschienen in:
2006 | OriginalPaper | Buchkapitel
Stress analysis: fracture mechanics
Erschienen in: Collected Works of J. D. Eshelby
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In fracture mechanics the interes lies in the elastic state near the crack tip. This state is characterized by three quantities K I, K II, K III, the stress intensity factors. If these quantities are the same for two crack tips, even though the crack geometries and the types of loading are different, then conditions are identical near the two tips. Closely related to the stress intensity factor is the crack extension force G which gives the amount of energy released from the system cracked-specimen-plus-loading-mechanism for unit advance of the crack front. This chapter discusses K and G and then briefly outlines the physical interpretation of fracture criteria and the plasticity around crack tips.