Analysis of stress intensity factors of modes I, II and III for inclined surface cracks of arbitrary shape

✍ Scribed by Y. Murakami

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 1021 KB
• Volume: 22
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(85)90163-8

✦ Synopsis

The analysis of stress intensity factors KI, Ku and Km by the body force method is developed for an arbitrarily shaped surface crack. The stress intensity factors for basic problems as semielliptical cracks, rectangular cracks and triangular cracks inclined to tensile axis at the surface of a semiinfinite body are numerically calculated.

Defining the polar coordinate system (r, 6) on the plane which is perpendicular to both the plane of crack and the line of crack front, we can determine the stress intensity factor lye which prescribes the stress field of the tangential stress ue. The m~imum value K,, max of & along the crack front can be expressed by the approximate formula: K*,,,,, = 0.650 aor-;

Poisson's ratio v = 0.3, where areap is the crack area projected in the direction of the maximum principal stress Q. The limitation and application rule of the approximate formula is also described.