考 虑 细 观 损 伤 的 推 进 剂 粘 弹 性 多 尺 度 本 构 模 型 研 究

Wubuliaisan Maimaitituersun, Tao Zhou, Yan Qing Wu*, Xiao Hou, Cheng Zhe Zhou

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

2 引用 (Scopus)

摘要

In order to study the damage evolution and mechanical properties of solid propellants,uniaxial tensile and stress relaxation tests were performed on NEPE propellant. The resulting stress‐strain curves and relaxation master modulus curves were obtained. A nonlinear viscoelastic constitutive model considering microscopic damage was developed under finite deformation. This model enables multiscale analysis of the mechanical response of propellants by incorporating the evolution of microvoids with various factors,including temperature,strain rate,confining pressure,and cyclic stress softening. The model was then implemented into ABAQUS with the parameters determined based on experimental data. Subsequently,the model was employed to predict the mechanical response of NEPE propellant under different loading conditions. The results demonstrate that the model accurately predicts the uniaxial tensile response of propellants under wide temperature ranges(223-333 K)and loading rates (1-200 mm·min-1). Moreover,the model exhibits reasonable predictability in cyclic loading,confining pressure tests,and biaxial tensile tests,thereby validating its effectiveness under complex stress conditions. Notably,the model necessitates only a small set of model parameters and can be easily programmed into commercial software,providing theoretical guidance for the multiscale analysis of the structural integrity of solid rocket motors.

投稿的翻译标题A Multiscale Viscoelastic Constitutive Model for Solid Propellants Considering Microscale Damage
源语言繁体中文
页(从-至)133-141
页数9
期刊Hanneng Cailiao/Chinese Journal of Energetic Materials
32
2
DOI
出版状态已出版 - 25 2月 2024

关键词

  • bi-axial tensile tests
  • confining pressure
  • microscopic damage
  • multiscale constitutive model
  • nonlinear viscoelasticity
  • solid propellants

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