4.7 Article

Experimental and numerical investigation on dynamic deformation and ignition response of NEPE-based propellants

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High-strain-rate mechanical response of HTPE propellant under SHPB impact loading

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Summary: This study developed a modified apparatus to research the stress-strain behavior of HTPE propellant under high-speed loading, revealing a correlation between the failure mode and mechanical response of the propellant. With the assistance of high-speed digital camera and scanning electron microscopy, the microscopic failure mechanism and characteristic failure modes of the HTPE propellant were investigated. Based on the stress-strain plots derived from the tests, it was found that the ultimate stress, strain energy density, and adiabatic temperature-rise effect of the HTPE propellant showed strong strain rate dependence.

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