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Impart studies on extruded food foams

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A Charpy-type impact test has been performed on a number of foams produced by the extrusion cooking process. The energy to break falls with increasing notch size for values of the notch length greater than the pore size. The critical strain energy release rate has been calculated from linear elastic fracture mechanics for rectangular cross-section foams. This approach has also been applied to foams of circular cross-section using calibration factors obtained from a comparison of rectangular and circular cross-section foamed plastics.

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  1. 1.

    J. M. Harper, “Extrusion of Foods” (CRC, Florida, 1981).

  2. 2.

    M. C. Bourne, “Food Texture and Viscosity: Concept and Measurement” (Academic, New York, 1982) p. 24.

  3. 3.

    J. Owusu-Ansah, F. R. van de Voort andD. W. Stanley,Can. Inst. Food Sci. Tech. J. 17 (1984) 65.

  4. 4.

    B. Launay andJ. M. Lisch,J. Food Engng 2 (1983) 259.

  5. 5.

    R. J. Hutchinson, G. D. E. Siodlak andA. C. Smith,J. Mater. Sci. 22 (1987) 3956.

  6. 6.

    D. J. van Zuilichem, G. Lamers andW. Stolp, “Influence of process variables on the quality of extruded maize”, Proceedings 6th European Symposium “Engineering and Food Quality”, Cambridge (1975).

  7. 7.

    A.-L. Hayter, A. C. Smith andP. Richmond,J. Mater. Sci. 21 (1986) 3729.

  8. 8.

    J. G. Williams andM. W. Birch,Fracture 1 (1977) 501.

  9. 9.

    G. P. Marshall, J. G. Williams andC. E. Turner,J. Mater. Sci. 8 (1973) 949.

  10. 10.

    A. McIntyre andG. E. Anderton,Europ. J. Cell. Plast. July (1978) 153.

  11. 11.

    E. Plati andJ. G. Williams,Polym. Engng Sci. 15 (1975) 470.

  12. 12.

    M. F. Ashby,Met. Trans. A 14 (1983) 1755.

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Kirby, A.R., Smith, A.C. Impart studies on extruded food foams. J Mater Sci 23, 2251–2254 (1988). https://doi.org/10.1007/BF01115796

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  • Foam
  • Energy Release Rate
  • Impact Test
  • Critical Strain
  • Linear Elastic Fracture Mechanic