✦ LIBER ✦

Stress intensity factors for cracks in panels with uniformly spaced holes

✍ Scribed by Robert H. Dodds Jr; David T. Read

Publisher: Elsevier Science
Year: 1987
Tongue: English
Weight: 810 KB
Volume: 26
Category: Article
ISSN: 0013-7944
DOI: 10.1016/0013-7944(87)90203-7

No coin nor oath required. For personal study only.

✦ Synopsis

Stress intensity factors are presented for cracks at the edges of the central holes in a panel containing a uniformly spaced array of circular holes. The finite element method is employed to obtain numerical values of the J-integral and the near-tip displacements from which the stress intensity factor, K,, is inferred. Six representative ratios of hole spacing to hole radius are studied: 1.2, 1.25, 1.4, 1.6, 2.0 and 4.0. For each hole spacing, the stress intensity factor is computed for a number of crack lengths for each of two crack configurations.

Uniaxial loading in two orthogonal directions is considered. Computed stress intensity factors are presented in graphical and functional form for all cases. The functional form should prove convenient for fatigue crack growth computations.

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