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April 30, 2026MaterialsOpen Access

Mesoscopic Damage Characteristics of NEPE Propellant Under Drop-Weight Impact

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Authors

ZZZhibo ZhangZSZhensheng SunYLYuxiang Liu

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Overview

Experiments studied solid rocket motors showing transgranular fracture with increasing impact forces, suggesting impacts may induce ignition.

Key Points

  • The aim is to investigate mesoscopic damage characteristics of NEPE propellant under drop-weight impact.
  • Conducted drop-weight experiments with varying impact impulses using a 10 kg hammer.
  • Characterized the internal meso-structure of NEPE propellant using micro-CT imagery.
  • Constructed a mesoscopic model including AP, Al, HMX particles, and voids based on micro-CT data.
  • Performed numerical simulations using the SPH-FEM coupling algorithm to analyze damage processes.
  • No significant damage occurs with impacts less than 13.85 N·s.
  • Matrix microcracks and void collapse appear as impulse increases.
  • Transgranular fracture and plastic flow occur when the impulse exceeds 24.25 N·s.
  • The overall damage degree is modeled with a Boltzmann function for safety assessment.

Cite This Study

Zhang et al. (2026) studied this question.

synapsesocial.com/papers/69f2a42a8c0f03fd677633c4https://doi.org/10.3390/ma19091773
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