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Indentation model and strain gradient plasticity law for glassy polymers

Published online by Cambridge University Press:  31 January 2011

David C. C. Lam  and
Arthur C. M. Chong
David C. C. Lam
Affiliation:
Department of Mechanical Engineering, Hong Kong University of Science and Technology, Kowloon, Hong Kong
Arthur C. M. Chong
Affiliation:
Department of Mechanical Engineering, Hong Kong University of Science and Technology, Kowloon, Hong Kong
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Abstract

Plastic deformation of metals is generally a function of the strain. Recently, both phenomenological and dislocation-based strain gradient plasticity laws were proposed after strain gradients were experimentally found to affect the plastic deformation of the metal. A strain gradient plasticity law is developed on the basis of molecular theory of yield for glassy polymers. A strain gradient plasticity modulus with temperature and molecular dependence is proposed and related to indentation hardness. The physics of the strain gradient plasticity in glassy polymer is then discussed in relation to the modulus.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 9 , September 1999 , pp. 3784 - 3788
Copyright
Copyright © Materials Research Society 1999

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References

REFERENCES

1.Nix, W.D. and Gao, H., J. Mech. Phys. Solids, 46, 411–25 (1998).CrossRefGoogle Scholar
2.Argon, A.S., Boyce, M.C., and Parks, D.M., Mechanics of Materials 7, 15–33 (1988).Google Scholar
3.Ward, I.M. and Hadley, D.W., An Introduction to the Mechanical Properties of Solid Polymers (John Wiley & Sons, Chichester, New York, 1995).Google Scholar
4.Ma, Q. and Clarke, D.R., J. Mater. Res. 10, 853–863 (1994).CrossRefGoogle Scholar
5.Fleck, N.A., Muller, G.M., Ashby, M.F., and Hutchinson, J.W., Acta Metall. et Mater. 42, 475–487 (1994).CrossRefGoogle Scholar
6.Fleck, N.A. and Hutchinson, J.W., J. Mech. Phys. Solids, 41, 1825–1857 (1993).Google Scholar
7.Bowden, P.B. and Raha, S., Phil. Mag. 29, 149–166 (1974).Google Scholar
8.Robertson, R.E., J. Chem. Phys. 44, 3950 (1966).Google Scholar
9.Duckett, R.A., Rabinawitz, S., and Ward, I.M., J. Mater. Sci. 5, 909 (1970).CrossRefGoogle Scholar
10.Argon, A.S., Phil. Mag. 28, 839–865 (1973).CrossRefGoogle Scholar
11.Li, J.C.M and Gilman, J.J., J. Appl. Phys. 41, 4248–4256 (1970).Google Scholar
12.Argon, A.S., Mater. Sci Technol. 6, 461–508 (1991).Google Scholar
13.Crist, B., Mater. Sci. Technol. 12, 427–469 (1991).Google Scholar
14.Chong, A.C.M and Lam, D.C.C, J. Mater. Res. 14 (1999, in press).CrossRefGoogle Scholar