SEDL / STP / STP1256-EB / STP16410S

Fatigue Fracture of Thin Plates Under Tensile and Transverse Shear Stresses

Viz, MJ
Graduate Research Assistant, Assistant Professor, and Undergraduate Research Assistant, Cornell University, Ithaca, New York

Zehnder, AT
Graduate Research Assistant, Assistant Professor, and Undergraduate Research Assistant, Cornell University, Ithaca, New York

Bamford, J-D
Graduate Research Assistant, Assistant Professor, and Undergraduate Research Assistant, Cornell University, Ithaca, New York

Pages: 21    Published: Jan 1995

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Abstract

Crack growth in thin sheets loaded under tension and transverse shear is studied experimentally and the mechanics of such problems are reviewed. A small scale yielding approach is adopted that describes the crack tip fields using a combination of Kirchhoff plate theory and plane stress elasticity. Techniques for calculating the relevant stress intensity factors are presented and validated with results from six test cases. Fatigue crack growth rates are measured using a double-edge notch test specimen configuration loaded in tension and torsion. A geometrically nonlinear finite element computation is used to determine the stress intensity factors as functions of axial load, torque, and crack length.