Abstract
Fracture toughness is a material property which can be defined in terms of critical stress intensity factor. For structural metals, for mode I deformation and small crack-tip plastic deformation the critical stress intensity factor when unstable fracture occurs is designated as KIc. Fracture toughness of metals is used in design to prevent brittle fracture as well as to predict fatigue crack growth. Fracture toughness of metals is a material property distinctly different from the corresponding yield strength. For example, fracture toughness decreases with increasing strain rate, whereas, yield strength shows the opposite effect (Fig. 1). Test methods have been established to determine plane strain fracture toughness (KIc) values for metals (see for example Ref. 1).
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References
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© 1989 Springer-Verlag New York Inc.
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Shah, S.P. (1989). Fracture Toughness of Cement-Based Materials. In: Shah, S.P., Swartz, S.E. (eds) Fracture of Concrete and Rock. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-3578-1_1
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DOI: https://doi.org/10.1007/978-1-4612-3578-1_1
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