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A plasticity model for powder compaction processes

Bakhshiani, A ; Sharif University of Technology | 2004

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  1. Type of Document: Article
  2. Publisher: 2004
  3. Abstract:
  4. An endochronic constitutive model for cold powder compaction processes is developed. Although the concept of yield surface has not been explicitly assumed in the endochronic theory, it is demonstrated that the cone-cap yield surface can be derived as a special case of the proposed endochronic model. The plastic flow rule and the dilatancy condition of the model are derived and a procedure for calibration of the material parameters of the constitutive model is proposed. Since large deformations are observed in powder compaction processes, the endochronic constitutive model based on large strain plasticity is presented and an integration scheme for the rate constitutive equations is established. The material parameters in the endochronic model are calibrated for MH-100 iron powder to reproduce experimental data and the predictive capability of the model is assessed by simulating a powder compaction process
  5. Keywords:
  6. Endochronic theory ; Hypoelastic model ; Large strain ; Powder compaction
  7. Source: European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2004, Jyvaskyla, 24 July 2004 through 28 July 2004 ; 2004
  8. URL: https://www.sciencedirect.com/science/article/pii/S0020768307004842