Skip to main content Accessibility help

Indentation model and strain gradient plasticity law for glassy polymers

  • David C. C. Lam (a1) and Arthur C. M. Chong (a1)


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.



Hide All
1.Nix, W.D. and Gao, H., J. Mech. Phys. Solids, 46, 411–25 (1998).
2.Argon, A.S., Boyce, M.C., and Parks, D.M., Mechanics of Materials 7, 1533 (1988).
3.Ward, I.M. and Hadley, D.W., An Introduction to the Mechanical Properties of Solid Polymers (John Wiley & Sons, Chichester, New York, 1995).
4.Ma, Q. and Clarke, D.R., J. Mater. Res. 10, 853863 (1994).
5.Fleck, N.A., Muller, G.M., Ashby, M.F., and Hutchinson, J.W., Acta Metall. et Mater. 42, 475487 (1994).
6.Fleck, N.A. and Hutchinson, J.W., J. Mech. Phys. Solids, 41, 18251857 (1993).
7.Bowden, P.B. and Raha, S., Phil. Mag. 29, 149166 (1974).
8.Robertson, R.E., J. Chem. Phys. 44, 3950 (1966).
9.Duckett, R.A., Rabinawitz, S., and Ward, I.M., J. Mater. Sci. 5, 909 (1970).
10.Argon, A.S., Phil. Mag. 28, 839865 (1973).
11.Li, J.C.M and Gilman, J.J., J. Appl. Phys. 41, 42484256 (1970).
12.Argon, A.S., Mater. Sci Technol. 6, 461508 (1991).
13.Crist, B., Mater. Sci. Technol. 12, 427469 (1991).
14.Chong, A.C.M and Lam, D.C.C, J. Mater. Res. 14 (1999, in press).


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed