李素云;杜志鹏;眭明斌;武岳;谢时雨;任杰;

• 1:中北大学机电工程学院
• 2:海军装备研究院
• 3:北京理工大学材料科学与工程学院
• 4:北京航空材料研究总院

摘要(Abstract)：

为研究石墨烯增强铝基SiC复合材料的力学性能,用万能材料试验机及分离式霍普金森压杆装置,在10~(-3)~5 200s~(-1)应变率内进行试验,计算得到常温条件下两组试验数据的真应力-应变曲线,用该压缩数据拟合Johnson-Cook(JC)及Cower-Symonds(CS)本构模型参数;并对两种压缩试验下的试件进行金相观察。结果表明:石墨烯增强铝基SiC复合材料具有明显的应变率硬化效应;拟合结果显示CS模型能更准确地描述该材料的应变率硬化效应;在宏观与微观下,裂纹均表现为向斜45°方向演化发展,在光镜下,将压缩试件在同一比例标尺下与原试件对比,准静态后的试件与动态压缩后的试件均发生整体颗粒细化,且随着应变率提高,沿裂纹方向的颗粒细化明显加剧。

关键词(KeyWords)： 石墨烯;复合材料力学性能;本构关系

Abstract:

Keywords:

基金项目(Foundation): 国家自然基金(1140020679;51404221);; 预研项目(3020301040105)

作者(Author): 李素云;杜志鹏;眭明斌;武岳;谢时雨;任杰;

Email:

DOI: 10.14024/j.cnki.1004-244x.20180102.002

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