Prediction of stored energy in polycrystalline materials during cyclic loading
- 作者：Paul Hå ; kansson ; Mathias Wallin ; Matti Ristinmaa
- 关键词：Crystal plasticity ; Heat generation ; Texture
- 刊名：International Journal of Solids and Structures
- 出版年：2008
- 期刊代码：93_00207683
- 类别：et
- 出版时间：15 March 2008
- 卷：45
- 期：6
- 页码：1570-1586
- 文件大小：966 K
摘要
The effect of initial texture on the stored energy is investigated. Uniaxially loaded polycrystalline materials with initial textures based on the Goss component and the Brass component are analyzed. For reference purposes a single crystal and an initial isotropic crystal orientation distribution are also analyzed. Special attention is directed at the thermomechanical behavior of polycrystalline material during cyclic loading, the temperature evolution and change in stored energy are studied. Cyclic loading of Cook’s membrane is also considered. The simulations are done using a rate-dependent crystal plasticity model for large deformations formulated within a thermodynamic framework. It is shown that incorporation of the latent-hardening into the Helmholtz free energy function and use of evolution laws of appropriate form allows a thermodynamically consistent heat generation due to plastic work.