Abstract
The Griffith energy criterion for fracture [1, 2] states: crack growth can occur if the energy required to form an additional crack of size da can just be delivered by the system. The case of a plate with fixed ends was discussed in chapter 1. Due to the fixed ends the external load cannot do work. The energy required for crack growth must then be delivered as a release of elastic energy. If the ends of the plate are free to move during crack extension, work is done by the external load. In this case the elastic energy content of the plate increases instead of decreasing.
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Further reading
Swedlow, J. L., On Griffith’s theory of fracture, Int. J. Fracture Mech., 1 (1965) pp. 210–216.
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Havner, K. S. and Glassco, J. B., On energy balance criteria in ductile fracture, Int. J. Fract. Mech., 2 (1966) pp. 506–525.
Broberg, K. B., Crack growth criteria and non-linear fracture mechanics, J. Mech. Phys. Sol., 19 (1971) pp. 407–418.
Boyd, G. H., From Griffith to COD and beyond, Eng. Fract. Mech., 4 (1972) pp. 459–482.
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© 1982 Martinus Nijhoff Publishers, The Hague
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Broek, D. (1982). The energy principle. In: Elementary engineering fracture mechanics. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-4333-9_5
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DOI: https://doi.org/10.1007/978-94-009-4333-9_5
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