eFunda: Fracture Modes
engineering fundamentals Fracture Modes
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There are three basic modes of crack tip deformation, the opening (Mode I), the in-plane shear (Mode II), and the out-of-plane shear (Mode III):

Mode I (Tension, Opening)

Mode II (In-Plane Shear, Sliding)

Mode III (Out-Of-Plane Shear, Tearing)

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