Research on the Constitutive Model of PTFE/Al/Si Reactive Material

Area of Science:

• Materials Science
• Energetic Materials
• Mechanical Engineering

Background:

• Reactive materials, particularly metal/polymer mixtures, are crucial energetic materials with promising engineering applications.
• Polytetrafluoroethylene/aluminum/silicon (PTFE/Al/Si) reactive material exhibits notable energy release characteristics.
• Understanding the mechanical properties of PTFE/Al/Si is essential for its effective utilization.

Purpose of the Study:

• To investigate the quasi-static and dynamic mechanical properties of PTFE/Al/Si reactive materials.
• To develop a constitutive model that accurately describes the material's behavior under different conditions.
• To provide data for guiding future research on reaction mechanisms and promoting engineering applications.

Main Methods:

• Quasi-static compression tests were performed to determine quasi-static mechanical properties.
• Split Hopkinson Pressure Bar (SHPB) tests were conducted to evaluate dynamic mechanical properties.
• Experimental data were used to construct a Johnson-Cook constitutive model.

Main Results:

• Acquired quasi-static and dynamic mechanical property data for PTFE/Al/Si reactive material.
• Developed a Johnson-Cook constitutive model incorporating strain hardening, strain rate hardening, and thermal softening effects.
• The model provides a framework for predicting material response under impact loading.

Conclusions:

• The study successfully characterized the mechanical behavior of PTFE/Al/Si reactive materials.
• The developed Johnson-Cook model offers a valuable tool for simulating and understanding material performance.
• These findings will facilitate the advancement of PTFE/Al/Si reactive materials in engineering applications.