关键词: 爆炸防护, 本构模型, 冲击试验, 纤维网络材料, 数值模拟

Abstract: As a novel explosion protection material, sintered fiber network materials exhibit transversely isotropic mechanical properties, posing challenges for engineering design and application. To achieve accurate numerical simulation of sintered fiber network materials, a transversely isotropic phenomenological dynamic constitutive model was established, and a user subroutine was developed to implement the constitutive model algorithms. Constitutive parameters of the sintered fiber network were obtained by fitting experimental stress-strain curves under different loading directions. To validate the constitutive model and parameters, explosion simulation loading tests and corresponding numerical simulations were conducted, revealing the material’s shock pressure attenuation characteristics. Results demonstrate that under varying shock loading directions, the numerical simulations show good agreement with experimental results in terms of shock pressure attenuation and specimen compression deformation. The fiber network material reduces shock pressure by up to 57.4%. The established constitutive model and parameters effectively capture the mechanical behavior of the fiber network material, providing a critical simulation tool for its engineering applications.

Key words: explosion protection, constitutive model, shock test, fiber network materials, numerical simulation