A Comparison of Numerical Methods for Determining Stress Intensity Factors

Deverall, LaMar I.; Lindsey, Gerald H.

doi:10.1115/1.3425464

Cited by 8 publications

(2 citation statements)

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“…For the circular bar, equation (3) In the present work, the compliance was determined as a function of crack length, and these data were fitted to polynomials of the form N ECD ---ao + I an (%)" 2 n = 2 (5) where ao, a,, are the coefficients of the fit, and N is the degree of the polynomial having the best fit to the experimental data. The polynomial ( 5 ) suppresses the coefficient a, to zero, which ensures that the strain-energy release rate is zero at zero crack length (8).…”

Section: Experimental Compliancementioning

confidence: 99%

Strain-energy release rate for a single-edge-cracked circular bar in tension

Daoud

Cartwright

Carney

1978

The Journal of Strain Analysis for Engineering Design

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The strain-energy release rate is determined for an edge crack in a uniformly stressed bar o f circular cross-section. Values o f the strain-energy release rate, obtained using a finite-element representation o f the bar and by measuring the compliance of the bar experimentally, are shown to be in close agreement. For crack depths of less than one-half diameter. the strain-energy release rates are found to be lower than existing results on rectangular bars having the same relative crack length. / Crack P A a =t t i t t 7

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Section: Experimental Compliancementioning

confidence: 99%

Strain-energy release rate for a single-edge-cracked circular bar in tension

Daoud

Cartwright

Carney

1978

The Journal of Strain Analysis for Engineering Design

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“…While stress intensity factors are obtainable by numerical techniques to reasonable accuracy, the computer costs rise significantly with increased accuracy. However, Deverall and Lindsey [10] did demonstrate that stress intensity factors to __+2% can be obtained with modest grids. The fracture characterization methods developed analytically by Mueller [I I] provided a crack displacement stress intensity factor relationship for a cracked sheet.…”

Section: Introductionmentioning

confidence: 99%

Viscoelastic rocket grain fracture analysis

1974

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A B S T R A C T A viscoelastic fracture analysis has been developed for rocket grain fracture predictions. The fracture analysis uses a stress intensity factor technique to predict crack velocity histories under thermal and pressurization loading conditions. The theory is compared with two-dimensional pressurized tests of two typical rocket motor geometries using the viscoelastic material, Solithane 113.

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