A wide range of strain rate sensitivity and impact-induced behavior of Al/PTFE reactive materials: Experimental and numerical investigation

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING Composites Part A: Applied Science and Manufacturing Pub Date : 2025-05-01 Epub Date: 2025-02-11 DOI:10.1016/j.compositesa.2025.108797

Xinxin Ren , Jinchun Liu , Jiaxiang Wu , Yuchun Li , Yan Tu , Zhengwei Meng

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Abstract

Under impact loading, Al/PTFE reactive materials demonstrate notable strain rate sensitivity and impact-induced ignition. To investigate the influence of impact velocity, Al/PTFE composites (26.5 %/73.5 %) with 35 μm Al particles were synthesized and subjected to quasi-static and dynamic compression experiments. Results revealed a bilinear logarithmic relationship between stress and strain rate. A two-stage simplified Johnson-Cook (JC) model was calibrated to determine its mechanical properties and the parameters were validated by numerical simulations matching the experimental results. Extended simulations analyzed a wide range of strain rate sensitivities and established a dynamic increase factor (DIF) formulation that accurately describes the dynamic mechanical response of the material. These findings provide a robust basis for material selection and performance prediction, supported by comparisons with existing literature.

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铝/聚四氟乙烯反应材料的大范围应变率敏感性和冲击诱导行为：实验和数值研究

在冲击载荷作用下，Al/PTFE反应材料表现出显著的应变率敏感性和冲击引燃性。为研究冲击速度对复合材料性能的影响，合成了35 μm Al颗粒（26.5% / 73.5%）的Al/PTFE复合材料，并进行了准静态和动态压缩实验。结果表明，应力与应变率呈双线性对数关系。对两阶段简化Johnson-Cook （JC）模型进行了标定，确定了其力学性能，并通过与实验结果相匹配的数值模拟对参数进行了验证。扩展的模拟分析了大范围的应变速率敏感性，并建立了一个动态增加因子（DIF）公式，该公式准确地描述了材料的动态力学响应。这些发现为材料选择和性能预测提供了坚实的基础，并与现有文献进行了比较。

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.