Repetitive superposition performance of stress waves in control module of projectile under dynamic impact
- 1School of Mechanical and Electrical Engineering, North University of China
- 2School of Environment and Safety Engineering, North University of China
- 3School of Aeronautics, Northwestern Polytechnical University
Abstract
During projectile launch or penetration, the control module (CM), as the brain of projectile, endures high dynamic impact, yet stress wave analysis in CM protection remains limited. This paper develops a self-designed projectile-control module device instrumented with polyvinylidene fluoride (PVDF) sensors placed at the front, middle, and rear sections of epoxy resin (EP) in the CM cavity for quantitative stress wave measurement. Split Hopkinson Pressure Bar (SHPB) tests with and without a transmission bar are conducted to reveal stress wave reflection and superposition. Air cannon tests and numerical simulations systematically investigate influencing factors, including acceleration amplitude and boundary constraints. Results show that wave impedance mismatch at the SHPB/EP interface causes superposition of incident and reflected waves, making the rear stress 30–100% higher than the front stress at different acceleration levels. Increasing pulse width induces multiple reflections, and a novel stress wave propagation process specific to the CM is proposed. The propagation performance shows significant pulse-width dependency, offering guidance for electronic component layout inside the CM.
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BibTeX
@article{song2026repetitive,
title = {{Repetitive superposition performance of stress waves in control module of projectile under dynamic impact}},
author = {Liqing Song and Jianping Yin and Yingbin Liu and Bing Hou and Zhiqiang Fan},
journal = {Scientific Reports},
year = {2026},
month = jul,
doi = {10.1038/s41598-026-63128-4},
url = {https://doi.org/10.1038/s41598-026-63128-4},
note = {CC BY},
}
RIS
TY - JOUR
TI - Repetitive superposition performance of stress waves in control module of projectile under dynamic impact
AU - Liqing Song
AU - Jianping Yin
AU - Yingbin Liu
AU - Bing Hou
AU - Zhiqiang Fan
PY - 2026
DA - 2026/07/01
JO - Scientific Reports
DO - 10.1038/s41598-026-63128-4
UR - https://doi.org/10.1038/s41598-026-63128-4
AB - During projectile launch or penetration, the control module (CM), as the brain of projectile, endures high dynamic impact, yet stress wave analysis in CM protection remains limited. This paper develops a self-designed projectile-control module device instrumented with polyvinylidene fluoride (PVDF) sensors placed at the front, middle, and rear sections of epoxy resin (EP) in the CM cavity for quantitative stress wave measurement. Split Hopkinson Pressure Bar (SHPB) tests with and without a transmission bar are conducted to reveal stress wave reflection and superposition. Air cannon tests and numerical simulations systematically investigate influencing factors, including acceleration amplitude and boundary constraints. Results show that wave impedance mismatch at the SHPB/EP interface causes superposition of incident and reflected waves, making the rear stress 30–100% higher than the front stress at different acceleration levels. Increasing pulse width induces multiple reflections, and a novel stress wave propagation process specific to the CM is proposed. The propagation performance shows significant pulse-width dependency, offering guidance for electronic component layout inside the CM.
SN - 2045-2322
ER -