Integrated Finite Element Modeling and High-Speed Impact Synthesis: A Novel Pathway for Embedded Al/W Energetic...

Area of Science:

• Materials Science
• Computational Mechanics
• Energetic Materials

Background:

• Advanced materials are crucial for emerging industries, driven by technological innovation.
• The finite element method (FEM) is a key computational tool for material science R&D.
• Developing novel energetic composites with enhanced properties is an ongoing challenge.

Purpose of the Study:

• To efficiently design and synthesize an Al/W energetic composite with concentrated energy release and an embedded structure.
• To investigate the impact dynamics and energy conversion of Al/W particles using FEM.
• To experimentally validate the properties of the synthesized Al/W energetic composite.

Main Methods:

• Combined ABAQUS finite element simulation and experimental synthesis.
• FEM analysis of stress, strain, embedding depth, and energy conversion under impact.
• Thermogravimetric-Differential Scanning Calorimetry (TG-DSC) to analyze reaction enthalpy and heat flow.

Main Results:

• Achieved embedded collisions between Al and W particles at 500 m/s via high-speed impact simulation.
• Synthesized Al/W energetic composites with a discrete embedded structure.
• Demonstrated a reaction enthalpy change of 8806.0 ± 152 J/g and a maximum heat flow rate of 101.5 ± 2.8 W/g, significantly higher than pure Al and mechanically mixed composites.

Conclusions:

• The integrated FEM simulation and experimentation approach provides an efficient pathway for designing and synthesizing novel energetic materials.
• The synthesized Al/W energetic composite exhibits superior energetic properties due to its unique embedded structure.
• High-speed impact simulation effectively guides the synthesis of materials with specific structural features.