1996
DOI: 10.1016/1359-6454(95)00236-7
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High strain rate deformation in particle reinforced metal matrix composites

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Cited by 72 publications
(55 citation statements)
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“…4 and 8. The general trend of increased strain-rate sensitivity for larger fractions of reinforcement is in qualitative agreement with predictions of modeling from the literature [17,33,34], but, as mentioned above, quantification of this effect would require micromechanical analysis pertinent to a matrix that displays a constant Ds=Dlnȯ regardless of its level of hardening. We note in passing the possibility that the intrinsic strain-rate sensitivity of alumina [79] may contribute to the strain-rate sensitivity of the present composites: this effect would certainly be greater in the 10A.…”
Section: Effect Of Volume Fractionsupporting
confidence: 70%
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“…4 and 8. The general trend of increased strain-rate sensitivity for larger fractions of reinforcement is in qualitative agreement with predictions of modeling from the literature [17,33,34], but, as mentioned above, quantification of this effect would require micromechanical analysis pertinent to a matrix that displays a constant Ds=Dlnȯ regardless of its level of hardening. We note in passing the possibility that the intrinsic strain-rate sensitivity of alumina [79] may contribute to the strain-rate sensitivity of the present composites: this effect would certainly be greater in the 10A.…”
Section: Effect Of Volume Fractionsupporting
confidence: 70%
“…In other words, composites with a strain-rate sensitive matrix are also strain-rate sensitive, while matrix metals that are not sensitive to strain rate result in composites that are not sensitive to strain rate. On the other hand, finite-element calculations show that strong constraint and localization imposed by the reinforcement on the distribution of plastic flow in the matrix result in potential enhancements in strain-rate sensitivity for a composite compared to the unreinforced matrix [33]. While that work assumed spherical reinforcements, it was later extended to other shapes of reinforcement [34], leading to the same conclusions.…”
Section: Introductionmentioning
confidence: 58%
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“…As deformation of the composite begins at high strain rates (e.g., 3 1000 s-I), fibers begin to crack, causing large local strains and correspondingly high strain rates within the matrix. Bao and Lin [19] calculate that the local strain rate can reach 5 times the macroscopic strain rate and under these circumstances the matrix is deforming at a strain rate of about 4000 SK', i.e., it effectively enters a strain-rate range where it is very strain-rate sensitive (see Fig. 6).…”
Section: Discussionmentioning
confidence: 99%
“…In a recent study Bao and Lin [8] applied finite element analysis to a particulate reinforced alloy and suggested that the main reason for the increasing rate sensitivity of the composite over the matrix alloy is due to the constraining effect of the particles. The constraint increases the local strain rate near the particulate/matrix interface, and hence pushes the composite into the high strain rate regime where the stress in the matrix increases rapidly.…”
Section: Introductionmentioning
confidence: 99%