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| Effect of grain number on plastic anisotropy of random polycrystalline aggregates |
| Revised:January 13, 2003 |
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| DOI：10.7511/jslx20046127 |
| KeyWord:crystal plasticity,initial anisotropy,polycrystalline material |
| Zhang Guang~ |
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| Abstract: |
| Taylor|type polycrystalline model is used to investigate the effect of grain number in random polycrystalline aggregates on its plastic anisotropy. Numerical tensile test is carried out to get effective stress under a given effective strain. In the simulation, aggregates of single crystal grains with different number of grains are used when loading along different directions. The stresses gained are denoted on the reference spherical surface. A reference variable is defined to describe the degree of anisotropy. The results from simulation show that the stress|strain response predicted by the model with definite grain number displays some degree of anisotropy, but with the increase of the number of grains the degree of anisotropy simulated by the model is decreased. Even for the same number of grains when taking the different methods to determine the random orientation, the degree of anisotropy of simulated is different. |
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