The M-Integral for Computing Stress in Generally Anisotropic Materials

NASA/CR-2005-214006, Wawrzynek, P.A. and Carter, B.J. and Banks-Sills, L., The M-Integral for Computing Stress in Generally Anisotropic Materials, George C. Marshall Space Flight Center, Marshall Space Flight Center, AL 35812, July, 2005, pp. 88, Format(s): PDF 2422k

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Single-crystal super alloys are commonly used for components in the hot sections of contemporary jet and rocket engines. Due to the anisotropic nature of single-crystal materials the use of existing isotropic fracture mechanics calculations leads to errors in stress intensity factors. The difference can be substantial.

Presented in this report is the solution for calculating stress intensity factors in generally anisotropic materials using the M-integral. Included are examples of this solution applied to Brazilian disk crack growth specimens.

Keywords:	single-crystal, anisotropic, fracture mechanics, brazilian disk, stress intensity fractures
Subjects:	Engineering: Structural Mechanics
ID Code:	707
Deposited On:	21 December 2005