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X-Ray Stress Determination in a Single Lap- Joint Containing a Debonded Region*

Published online by Cambridge University Press:  06 March 2019

A. Lankford ,
C. S. Barrett  and
Paul Predecki
A. Lankford
Affiliation:
University of Denver, DenverCO 80208
C. S. Barrett
Affiliation:
University of Denver, DenverCO 80208
Paul Predecki
Affiliation:
University of Denver, DenverCO 80208
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Extract

XRD has been found to be a useful technique for investigating both surface and interior stresses in. adhesive bonded joints. For the interior stresses, to gain access to the joint interface, adherends were chosen such that one adherend was relatively transparent to the X-radiation used and the other was not. Incident X-rays then penetrated the first adherend and the adhesive, and were diffracted from just below the surface of the second adherend.

In prior work it was shown that the measured stresses due to an applied load agreed quite well with stresses calculated for the same joint using the TEXGAP-2D finite element program, except at one extremity of the bond. One explanation proposed for the discrepancy was that a small debond was present at this extremity. In the present study, therefore, an investigation was made of a joint contfli'nitig an intentional debond at this extremity.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 29: Thirty-Fourth Annual Conference on Applications of X-ray Analysis, August 5-9, 1985 , 1985 , pp. 57 - 62
Copyright
Copyright © International Centre for Diffraction Data 1985

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Footnotes

*

Work supported by the U.S. Army Research Office on Grant # DAAG29–1– 0150.

References

1. Barrett, C.S. and Predecki, Paul, X-ray Diffraction Evaluation of Adhesive Bonds and Stress Measurements with Diffracting Paint, Adv. in X-Ray Anal. 24: 231-238 (1981).Google Scholar
2. Predecki, Paul and Barrett, C.S., Stress Determination In an Adhesive Bonded Joint by X-ray Diffraction, Adv. in X-Ray Anal. 27 ;251-260 (1984).Google Scholar
3. Predecki, Paul, Barrett, C.S., Lankford, A.E. and Gutieirrez, D.-Lemini, Stresses in an Adhesive Bond at an Adhesive/Adhesive Interface Under Load, Adhesion, J. (1986) in press (12 pages).Google Scholar
4. See, for example, Cohen, J.B., Dolle, H. and James, M.R. in Natl, Bureau of Standards Special Pub. 567: “Accuracy in Powder Diffraction.” Block, S. and Hubbard, C.R., eds. pp. 453-477 (1980).Google Scholar
5. See, for example, Broek, D., “Elementary Engineering Fracture Mechanics.“ Martinus Nijhoff, p. 9 (1982).Google Scholar