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A theory for creep crack growth (1976)

Tien, J. K. ; Purushothaman, S.

In: Other Sources

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Publication Date: 2019-06-27

Description: The paper derives an analytical expression for creep crack growth rate based on a model in which the higher and concentrated stresses ahead of the crack tip enhance creep deformation, thus progressively causing stress rupture and continuous crack advance. The equation derived for creep crack growth rate is expressed in terms of a geometrical factor in the stress intensity expression and in terms of the crack tip radius whose lower limit estimate is the fracture mechanics crack-tip opening displacement. The functional features of the derived creep crack growth rate equation can be compared with those of a pertinent empirical equation. The analytical expression provides some guidelines for alloy and microstructure design.

Keywords: METALLIC MATERIALS

Type: Scripta Metallurgica; 10; Aug. 197

Format: text

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