... of small cracks growing in holes using eddy currents is described. A resonance-type or a servohydraulic test machine for variable amplitude loading can be controlled by the system. The method can detect and measure cracks with depths in the range of about 0.1 to 2 mm and more than one crack can be present...

... Although laminated plates have gained acceptance for use in primary aircraft structural components, their behavior is still not completely understood. The need to include multiple holes for fasteners, weight reduction, and access greatly complicates design processes developed for unnotched...

... with center square hole provided the plastic zone length and the local stresses. The results verified that the criterion controlling fracture in center-notched specimens is applicable to other notch geometries. Namely, failure is controlled by a critical ratio of the largest principal stress to off-axis...

... or no solutions are known. cracks stress-intensity factor stress-concentration factor stress functions elasticity holes Paul W. Tan,^ Ivatury S. Raju,^ and James C. Newman, Jr? Boundary Force Method for Analyzing Two-Dimensional Cracked Plates REFERENCE: Tan, P. W., Raju, I. S., and Newman, J. C , Jr...

... The literature contains several analytical and experimental evaluations of Mode I stress-intensity factors for corner cracks at holes in plates subjected to remote tension, remote bending, or pin loading in the hole. Unfortunately, these solutions give very different stress-intensity factors...