On the basis of the data of craze behaviour under static tension, the deformation curves followed by continuous initiation and growth of crazes are plotted for a variety of testing conditions, such as constant stress, constant strain-rate and constant strain tensions applying the Johnston-Gilman theory for dislocations. Experimentally determined values of the density and growth rate of crazes, which are regulated in accordance with a simple rate theory, are used for the calculations. Comparison of the theory with the experimental results is favourable except for the results of high strain-rate tension and stress relaxation. The application of the dislocation analogue approach to the craze deformation kinetics was found to be valuable.
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Kitagawa, M., Kawagoe, M. Plastic deformation by crazing in polycarbonate. J Mater Sci 14, 953–960 (1979). https://doi.org/10.1007/BF00550727
- Growth Rate
- Plastic Deformation
- Stress Relaxation