The Strength of Concrete

The application of Griffith’s theory to explain failure in hardened cement paste is discussed in Chapter 4. Failure due to external loading is brought about by the spontaneous growth of the critical crack when the strain energy release rate equals the maximum rate of energy requirement. At this point the rate of energy release is known as the ‘critical strain energy release rate’, G c , and is, apparently, a characteristic property of the material.

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