A method of detection of crack location based on measurement of deflection of long pipes under bending loads is presented in this paper. Crack is considered to be cross-sectional with straight front parallel to its diameter and perpendicular to the plane of deflection. The crack is modelled by a rotational spring whose stiffness can be determined using the linear elastic fracture mechanics approach. Pipes supported like cantilever and simply supported beams have been examined. The details of the method are presented. Experiments have been carried out using steel and aluminium pipes to demonstrate the effectiveness of the method. Cracks were introduced by wire-cut machining. The crack locations have been theoretically predicted with error less than 9 %.
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Naik, S.S. Crack Detection in Pipes Using Static Deflection Measurements. J. Inst. Eng. India Ser. C 93, 209–215 (2012). https://doi.org/10.1007/s40032-012-0027-z
- Crack detection in pipes
- Static deflection measurements
- Structural health
- Rotational spring model