Structural Energetic Properties of Al/PVDF Composite Materials Prepared Using Fused Filament Fabrication,Propellants, Explosives, Pyrotechnics

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Structural Energetic Properties of Al/PVDF Composite Materials Prepared Using Fused Filament Fabrication
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2021-02-10 , DOI: 10.1002/prep.202000183
Trevor J. Fleck _{1,

2} , Timothy D. Manship _{1,

3} , Steven F. Son _{1,

3} , Jeffrey F. Rhoads _{1,

2,

4}

Affiliation

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.

中文翻译：

熔融长丝法制备Al / PVDF复合材料的结构能特性

改变铝/聚偏二氟乙烯多功能高能结构材料（MESM）的成分，以便确定固含量和粒径对材料结构能特性的影响。更具体地说，将七种不同的材料配方与增材制造配对，以量化与MESM用例相关的关键性能指标。通过对3D打印的狗骨形样品进行准静态拉伸试验确定，发现弹性模量和极限强度都很大程度上取决于固体含量。当铝含量从10％转变为50％时，它们分别从71 MPa增加到208 MPa，从34.5 MPa降低到21.6 MPa。为了表征燃烧特性，热化学代码用于预测所考虑配方的燃烧热和绝热火焰温度，显示最高预测温度接近20％Al。此外，对3D打印配方进行了燃烧速率测量，以量化其燃烧性能。在空气中燃烧时，发现在30％Al的稍富燃料条件下会出现最大燃烧率。表征完成后，通过将关键的MESM设计参数相互绘制，可以直观地看出机械性能和燃烧性能之间的权衡。在3D打印配方上进行了燃烧速率测量，以量化其燃烧性能。在空气中燃烧时，发现在30％Al的稍富燃料条件下会出现最大燃烧率。表征完成后，通过将关键的MESM设计参数相互绘制，可以直观地看出机械性能和燃烧性能之间的权衡。在3D打印配方上进行了燃烧速率测量，以量化其燃烧性能。在空气中燃烧时，发现在30％Al的稍富燃料条件下会出现最大燃烧率。表征完成后，通过将关键的MESM设计参数相互绘制，可以直观地看出机械性能和燃烧性能之间的权衡。

更新日期：2021-03-31

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