Abstract
Full-field strain distributions in the cold drawing of polycarbonate cylindrical bars are obtained using photoplasticity at three stages of neck propagation. The results indicate that the radial and circumferential strains are almost identical. The strain distributions in the seemingly straight (drawn) portion are nonuiform. The locations of maximum and minimum strains shift when elongations increase. Various sensitivity studies are also reported.
Similar content being viewed by others
References
Hutchinson, J.W. andNeal, K.W., “Neck Propagation,”J. Mech. Phys. Solids,31,405–426 (1983).
Neal, K.W. andTugcu, P., “Analysis of Necking and Neck Propagation in Polymeric Materials,”J. Mech. Phys. Solids,33,323–337 (1985).
Burger, C.P., “Nonlinear Photomechanics,”Experimental, Mechanics,20,381–389 (1980).
Gomide, H.A. andBurger, C.P., “Three-dimensional Strain Distribution in Upset Rings by Photoplastic Simulation,”Experimental Mechanics,21,361–369 (1981).
Burger, C.P. andGomide, H.A., “Three-dimensional Strain Field for a Hot-rolled Billet by Photoplastic Simulation,”Experimental Mechanics,22,441–447 (1982).
Brill, W.A., Basic Studies in Photoplasticity, PhD Diss., Stanford Univ. (1966).
Cloud, G.L., “Mechanical-optical Properties of Polycarbonate Resin and Some Relations with Material Structure,”Experimental Mechanics,26,489–499 (1969).
Dally, J.W. andMulc, A., “Polycarbonate as a Model Material for Three-dimensional Photoplasticity,”J. Appl. Mech.,95,600–605 (1973).
Spitzig, W.A. andRichmond, O., “Effect of Hydrostatic Pressure on the Deformation Behavior of Polyethylene and Polycarbonate in Tension and Compression,”Poly. Eng. Sci.,19,1129–1139 (1979).
Lee, J.H., “Characterization of Strain Hardening for a Simple Pressure-sensitive Plasticity Model,”Acta Mech.,77,133–151 (1989).
Blakemore, R.H. and Marsden, B., “Polycarbonate as a Photoelastic Material,” Strain, 124–125 (1980).
El-Hout, J.N., A Three-dimensional Strain Distribution in Hotrolled Aluminum by Photoplastic Simulation, MS Thesis, Iowa State Univ. (1977).
G'Sell, C., Aly-Helan, N.A. andJonas, J.J., “Effect of Stress Triaxiality on Neck Propagation During the Tensile Stretching of Solid Polymers,”J. Mat. Sci.,18,1731–1742 (1983).
Wan, M., Experimental Studies on the Strain Distributions of Necking Processes in Polycarbonate Using Photoplasticity, MS Thesis, Univ. of Alaska Fairbanks (1989).
Malvern, L.E., Introductions to the Mechanics of a Continuous Medium, Prentice-Hall (1968).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Lee, J.H., Wan, M. Strain distributions in the cold drawing of cylindrical polymeric bars using photoplasticity. Experimental Mechanics 30, 145–151 (1990). https://doi.org/10.1007/BF02410240
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF02410240