Measurement of residual stresses in a circular ring using the successive cracking method

Article Abstract:

A successive cracking method based on fractal mechanics is used to measure the residual stresses in a circular ring. A crack is introduced in the ring, and the strain is measured while increasing the crack. The residual stress is calculated by determining the changes in the strain with the increase in the crack. Using these measurements, the distribution of the residual stress in an uncracked ring is determined. A comparison of the results of the method with those of the sectioning method shows that the cracking method is simple, valid, and effective.

Research, Fracture mechanics, Cylinder (Mathematics), Cylinder (Geometry)

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A method for the experimental determination of residual stresses in axisymmetric composite cylinders

Article Abstract:

A method for computing the residual stresses in composite circular cylinders is given. The drilling and turning technique is used as a basis for deriving the method. The drilling technique limits the residual stresses within the elastic regime of the material. The analysis assumes that the cylinder is made of an elastic material with asymmetrical stress from the radius and generalized plane strain conditions are assumed for the material. An example is given which illustrates the use of the method through a computer program.

Analysis, Cylinders, Cylinders (Machinery)

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Determination of nonuniform residual stresses using the ring-core method

Article Abstract:

The use of the integral equation method in the ring core method for the analysis of nonuniform residual stress in annular grooves removes the defects of the incremental strain method. However, this method requires the determination of several influence coefficients. The experimental results of the integral equation method with linearly varying stress field confirm theoretical predictions. The errors in the incremental strain method increase with an increase in the stress fields.

Integral equations

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