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Structural Energetic Properties of Al/PVDF Composite Materials Prepared Using Fused Filament Fabrication
Author(s) -
Fleck Trevor J.,
Manship Timothy D.,
Son Steven F.,
Rhoads Jeffrey F.
Publication year - 2021
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.202000183
Subject(s) - materials science , combustion , composite material , fabrication , composite number , ultimate tensile strength , material properties , explosive material , polyvinylidene fluoride , energetic material , fused filament fabrication , structural material , young's modulus , polymer , medicine , chemistry , alternative medicine , organic chemistry , pathology
The constituents of an aluminum/polyvinylidene fluoride multifunctional energetic structural material (MESM) were varied in order to determine the effect of solids loading and particle size on the structural energetic properties of the material. More specifically, seven different material formulations were paired with additive manufacturing to quantify key performance metrics relevant to the MESM use case. Determined via the quasi‐static tensile testing of 3D printed dogbone samples, both the modulus of elasticity and the ultimate strength was found to be heavily dependent on the solids loading; respectively increasing from 71 MPa to 208 MPa and decreasing from 34.5 MPa to 21.6 MPa, when transitioning from a 10 % Al loading to a 50 % Al loading. To characterize the combustion properties, a thermochemical code was used to predict the heat of combustion and the adiabatic flame temperature for the formulations considered, showing a maximum predicted temperature near 20 % Al. Also, burning rate measurements were conducted on the 3D printed formulations in order to quantify their combustion performance. When burning in air, a maximum burning rate was found to occur at the slightly fuel‐rich condition of 30 % Al. Upon completion of the characterization, the trade‐off between mechanical performance and combustion performance was visualized by plotting critical MESM design parameters against one another.