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To improve the compression molding quality of explosive powder, a modeling method that treats explosive powder as a continuum was adopted. Using an elastoplastic material model that considers thermodynamic changes, taking a specific size explosive column as an example, the DEFORM finite element software was employed to simulate the powder compression process, analyze the changes in relative density during the compression process, and study the density evolution law of the molded column. The results show that this simulation model can well simulate the powder compression molding process. For the pressure-density curve, the maximum relative error of density between the test and simulation under each specific pressure is only 0.996%. Regarding the density distribution of the column: the density distribution of the column near the punch end is such that the density at the edge is greater than that at the center; the density distribution of the column near the base end is such that the density at the center is greater than that at the edge, which is consistent with the results of relevant studies.

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Simulation and Verification of Explosive Powder Compression Molding Based on Thermodynamic Elastoplastic Model

  • 会议论文

  • 发表日期：

    2026年

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  • Jin Luo,
  • Linjing Tang,
  • Xuying Jiao,
  • Yifan Li,
  • Xianzhen Jia

摘要

To improve the compression molding quality of explosive powder, a modeling method that treats explosive powder as a continuum was adopted. Using an elastoplastic material model that considers thermodynamic changes, taking a specific size explosive column as an example, the DEFORM finite element software was employed to simulate the powder compression process, analyze the changes in relative density during the compression process, and study the density evolution law of the molded column. The results show that this simulation model can well simulate the powder compression molding process. For the pressure-density curve, the maximum relative error of density between the test and simulation under each specific pressure is only 0.996%. Regarding the density distribution of the column: the density distribution of the column near the punch end is such that the density at the edge is greater than that at the center; the density distribution of the column near the base end is such that the density at the center is greater than that at the edge, which is consistent with the results of relevant studies.