Abstract
For over a decade, the first author and his associates have worked towards the development of an optical experimental modelling technique for predicting both the flaw shape and the stress intensity factor distribution in three dimensional (3D) cracked body problems where neither are known a priori. The application is associated with sub-critical flaw growth, the precursor to most service fractures.
This paper presents an assessment of results obtained by applying the technique which consists of a marriage between frozen stress photoelasticity and Moiré analysis to measure the stress intensity factor distribution across a straight front crack in a body of finite thickness in order to assess constraint effects.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
Smith, C. W., “Use of three dimensional photoelasticity and progress in related areas”, Experimental Techniques in Fracture Mechanics 2, A. S. Kobayashi, ed., SESA Monograph No. 2, pp. 3–58, 1975.
Smith, C. W., Peters, W. H. and Andonian, A. T., “Mixed mode stress intensities for part circular surface flaws”, J. of Engineering Fracture Mechanics, Vol. 13, pp. 615–629, 1979.
Sih, G. C. and Kassir, M. K., “Three dimensional stress distribution around an elliptical crack under arbitrary loadings”, J. of Applied Mechanics, Vol. 33, pp. 601–611, 1966.
Post, D. and Baracat, W. A., “High-sensitivity Moiré interferometry–a simplified approach”, J. of Experimental Mechanics, Vol. 21, No. 3, pp. 100–104, March 1981.
Wilhem, D. P., “Fracture mechanics guidelines for aircraft structural applications”, USAFFDL TR-69–111, Wright Patterson Air Force Flight Dynamics Laboratory, February 1970.
Smith, F. W. and Kullgren, T. E., “Part elliptical cracks emanating from open and loaded holes in plates”, J. of Engineering Materials and Technology, Vol. 101, No. 1, pp. 12–17, January 1979.
McGowan, J. J. and Smith, C. W., “Stress intensity factors for deep cracks emanating from the corner formed by a hole intersecting the plate surface”, ASTM STP 590, pp. 460–476, 1976.
Kullgren, T. E. and Smith, F. W., “Static fracture testing of PMMA plates having flawed fastener holes”, J. of Experimental Mechanics, Vol. 20, No. 3, March 1980.
Smith, C. W., Peters, W. H. and Gou, S. F., “Influence of flaw geometries on hole-crack stress intensities”, ASTM STP 677, pp. 431–445, 1979.
Broekhoven, M. J. G., “Fatigue and fracture behavior of cracks at nozzle corners: comparisons of theoretical predictions with experimental data”, Proceedings of the Third International Conference on Pressure Vessel Technology, Part II, pp. 839–852, 1977.
Smith, C. W. and Peters, W. H., “Experimental observations of 3D geometric effects in cracked bodies”, Developments in Theoretical and Applied Mechanics, Vol. 9, pp. 225–234, 1978.
Smith, C. W. and Peters, W. H., “Prediction of flaw shapes and stress intensity distributions in 3D problems by the frozen stress method”, Preprints from Sixth International Congress on Experimental Stress Analysis, pp. 861–865, 1978.
McGowan, J. J. and Smith, C. W., “Analysis of a straight front crack”, unpublished, 1977.
Folias, E. S., “On the three dimensional theory of cracked plates”, J. of Applied Mechanics, pp. 663–674, September 1975.
Benthem, J. P., “The quarter-infinite crack in a half space; alternative and additional solutions”, Int. Journal of Solids and Structures, Vol. 16, pp. 119–130, 1980.
Benthem, J. P., “State of stress at the vertex of a quarter infinite crack in a half space”, Int. Journal of Solids and Structures, Vol. 13, pp. 479–492, 1977.
Hartranft, R. J. and Sih, G. C., “Effect of plate thickness on the bending stress distribution around through cracks”, J. of Mathematics and Physics, Vol. 47, No. 3, pp. 276–291, September 1968.
Sih, G. C., “Three-dimensional stress-state in a cracked plate”, Proc. of the Air Force Conf. in Fatigue and Fracture of Aircraft Structures and Materials, AFFDL, TR 70–144, pp. 175–191, 1970.
Gross, B. and Srawley, J. E., “Stress intensity factors for single-edge-notch specimens in bending or combined bending and tension by boundary collocation of a stress function”, NASA TN E-2801, 1965.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1983 Martinus Nijhoff Publishers, The Hague
About this paper
Cite this paper
Smith, C.W., Nicoletto, G. (1983). Experimental Stress Intensity Distributions by Optical Methods. In: Sih, G.C., Provan, J.W. (eds) Defects, Fracture and Fatigue. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-6821-9_26
Download citation
DOI: https://doi.org/10.1007/978-94-009-6821-9_26
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-009-6823-3
Online ISBN: 978-94-009-6821-9
eBook Packages: Springer Book Archive