Abstract
The stable and unstable plastic flow of stainless steel-clad aluminum and aluminum-clad stainless steel sandwich sheet materials deformed in uniaxial tension have been investigated. For the clad sheet materials studied experimentally, stable deformations were uniform in the component layers, and the assumption of isostrain was used in modeling the deformation behavior. The rule of mixtures, an average of component properties weighted by cross-sectional area fractions, was applied to determine sandwich uniaxial true stress-true strain curves from those of the components. In addition, measurements of residual stress distributions in deformed tensile specimens gave insight into states of stress during loading. A model to determine the magnitude of stresses which are generated by component normal plastic anisotropy differences was developed as well. With this knowledge of the stress state, predictions of uniform elongation of the clad sheet materials were made which compared favorably to experimental measurements. As for ductile monolithic sheet materials, stable flow of sandwich sheet materials in tension was limited by diffuse necking, which leads to local instability at higher strains. This local instability gives rise to a through-thickness localized thinning which terminates macroscopic deformation. Conditions for local instability in uniaxial tension have been developed for sandwich as well as monolithic sheet materials. Predictions from these models are in agreement with measurements.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
W. A. Backofen:Deformation Processing, Addison Wesley Publishing Company, Reading, Massachusetts, 1972.
A Nactai:Theory of Flow and Fracture of Solids, McGraw-Hill, New York, 1950.
A. K. Ghosh:Met. Trans., 1974, vol. 5, p. 1607.
A. K. Ghosh:Met. Trans. A, 1977, vol. 8A, p. 1221.
R. Hill:Proc. Roy Soc. (Land), 1948, vol. 193A, p. 281.
A. Kelley and G. J. Davies:Met. Rev., 1965, vol. 10, p. 1.
H. R. Piehler:Trans. TMS-AIME, 1965, vol. 233, p. 12.
R. Hawkins and J. C. Wright:J. Inst. Metals, 1971, vol. 99, p. 357.
J. G. Beese and G. M. Bram:J. Eng. Mater. Technol, 1975, vol. 97, p. 10.
I. Ahmad and J. M. Barranco:Met. Trans., 1970, vol. 1, p. 989.
S. T. Mileiko:J. Mater. Sci., 1969, vol. 4, p. 974.
G. Garmong and R. B. Thompson:Met. Trans., 1973, vol. 4, p. 863.
J. B. Ulam: Stainless Steel Clad Aluminum and Methods of Making Same, U.S. Patent 3,210,840, October 12, 1965.
C. S. Barrett and T. B. Massalski:Structure of Metals, McGraw-Hill, New York, 1966.
G. Hillmann, W. Hofmann, and H. Schimkat:Conference on Corrosion of Reactor Materials, p. 93, Inter. Atomic Energy Agency, Vienna, 1962.
O. Doi and T.Ukai:Bull. JSME, 1971,vol. 14,p. 1.
D. O. Leeser and R. A. Daane:Proc. Soc. Exp. Stress Anal, 1954, vol. 12, p.203.
S. L. Semiatin and H. R. Piehler:Proc. NAMRC-III, p. 231, Carnegie Press, Pittsburgh, 1975.
S. L. Semiatin: Ph.D. Thesis, Carnegie-Mellon University, 1977.
Photo fabrication Methods with Kodak Photosensitive Resists, Kodak Publication No. P-246, Eastman Kodak Company, Rochester, New York, 1971.
W.T. Lankford and E.Saibel:Trans. AIME, 1947, vol. 171, p. 562.
R. L. Whitely:Trans.ASM, 1960, vol. 52, p. 154.
K. R. Van Horn, ed.:Aluminum, vol. 1,Properties, Physical Metallurgy, and Phase Diagrams, ASM, Metals Park, Ohio, 1967.
R. Hill:The Mathematical Theory of Plasticity, Oxford University Press, London, 1950.
W. A. Backofen, W. F. Hosford, Jr., and J. J. Burke:Trans. ASM, 1962, vol. 55, p. 264.
M. J. Painter and R. Pearce:J. Phys. D, 1974, vol. 7, p. 992.
P. W. Bridgman:Large Plastic Flow and Fracture, McGraw-Hill, New York, 1952.
Author information
Authors and Affiliations
Additional information
S. L. SEMIATIN, forMetly Graduate Student, Department of Metal-lurgy and Materials Science, Carnegie-Mellon University.
Rights and permissions
About this article
Cite this article
Semiatin, S.L., Piehler, H.R. Deformation of sandwich sheet materials in uniaxial tension. Metall Trans A 10, 85–96 (1979). https://doi.org/10.1007/BF02686411
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02686411