The stress-strain fields at crack tip in axially cracked cylindrical shells and the calculation of stress intensity factors |
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Authors: | Liu Chuntu Wu Xijia |
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Affiliation: | (1) Institute of Mechanics, Academia Sinica, Taiwan |
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Abstract: | A perturbation solution for stress-strain fields (including modes I, II, III) at crack tip in axially cracked cylindrical shells is given. The analysis, using 10th-order differential equations which take the transverse shear deformations into account, involves perturbation in a curvature parameter λ2, (λ2=[12(1-v 2)]1/2 a 2/Rh). Stress intensity factors for finite size cylindrical shells under bending and internal pressure loading are evaluated. A good accuracy can be obtained without using fine meshes in a region near the crack tip. Besides, the influence of the finite size and the shearing stiffness on bulging factors, which are commonly used in engineering, are analyzed. |
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Keywords: | cylindrical shell crack stress-strain field stress intensity factor bulging factor |
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