Abstract
Composite failure in directionally-solidified-noncellular Al−Al3Ni eutectics was observed to occur by a statistical accumulation of fiber breaks. The distribution of fiber breaks was determined by quantitative metallographic techniques and related to the fiber strength distribution using a modification of the statistical theory of composite failure developed by Rosen. This approach enables an evaluation, as a function of composite stress, of the cumulative link distribution function for fiber links of length equal to the critical length. Results of the analysis permit the development of a modified rule-of-mixtures relationship which more accurately defines the actual partition of composite stress between fiber and matrix. At composite failure, this analysis showed that the remaining unbroken fiber elements were stressed in excess of 700 ksi while the matrix stress was of the order of 16 ksi.
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C. BAROMEO, formerly Graduate Student, Department of Mechanical Engineering, University of Texas
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Baromeo, C., Courtney, T.H. Partitioning of stress between fiber and matrix during tensile deformation of the Al−Al3 Ni eutectic composite. Metall Trans 4, 1821–1828 (1973). https://doi.org/10.1007/BF02665408
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DOI: https://doi.org/10.1007/BF02665408