研究目的
To develop a simplified thermo-mechanical model for evaluating the interaction between damage agents and fabric-based armor protection, incorporating energy dissipation mechanisms and using infrared thermography for damage characterization.
研究成果
The study demonstrates the feasibility of using infrared thermography to analyze dynamic temperature distributions during impact on armor protection. The developed mathematical model adequately describes the physical processes, including energy dissipation and heating. It allows for the analysis of various parameters affecting armor performance. Preliminary experiments show reasonable agreement with the theory, supporting the model's utility in predicting and testing armor quality.
研究不足
The acquisition frequency of the IR imager (1 Hz) limits the analysis of fast thermal events. Experimental repeatability is affected by poorly controlled parameters, leading to variations in results. The model requires parameter identification from experiments, and discrepancies between theory and experiment exist (e.g., around 18% for energy absorption).
1：Experimental Design and Method Selection:
The study uses a combined theoretical and experimental approach. A mathematical model is developed to simulate the interaction, involving energy dissipation from irreversible deformations, friction, and heating. Numerical methods, including a discrete model and difference schemes, are employed for simulation. Infrared thermography is used for experimental validation.
2：Sample Selection and Data Sources:
Samples include multilayer woven fabric packs made of ballistic fabric with aramid fibers (e.g., RUSAR aramid fibers), with specific dimensions (e.g., 60x60 mm samples) and surface densities. Data sources include experimental measurements of temperature and energy absorption from impact tests.
3：List of Experimental Equipment and Materials:
Equipment includes a small-bore rifle for impact, steel balls as damage agents, an IRTIS-2000 IR imager for temperature measurement, and computational tools for numerical modeling. Materials include polymer fabrics, aramid fibers, and a pliable base for sample support.
4：Experimental Procedures and Operational Workflow:
Samples are impacted with steel balls at varying velocities (260-760 m/s). Temperature is measured using IR thermography. Numerical simulations are performed using the developed model to compute displacements, stresses, and temperatures, with parameters identified from experimental data.
5：Data Analysis Methods:
Data analysis involves comparing experimental and theoretical results for energy absorption, deformation areas, and temperature. Statistical methods are used to assess repeatability and discrepancies.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
