首页|CFRP-Al混合立柱轴压吸能关键参数及影响规律

CFRP-Al混合立柱轴压吸能关键参数及影响规律

Crucial parameters and influence rules of axial crushing energy absorption of CFRP-A1 hybrid columns

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为了研究碳纤维增强树脂(Carbon fiber reinforced polymer,CFRP)-铝合金(Aluminium alloy,Al)开剖面混合立柱结构在轴向载荷下的失效行为及能量吸收特性,通过准静态轴向压缩试验与有限元仿真相结合的方法,分析了不同关键参数对CFRP-A1混合立柱轴压失效行为和能量特性的影响规律.结果表明:铝合金单层壳模型采用基于弹塑性本构与GISSMO损伤模型,CFRP层合壳模型采用Chang-Chang层内失效准则与基于B-K层间损伤模型,能够精确模拟CFRP-A1混合立柱轴压失效行为及吸能特性.通过对相对厚度比例、圆角率、开合角度、梯度和诱导孔等关键参数分析,在相对厚度比例系数η=67％,圆角半径y=50％,开合角度θ=120°,梯度T=8,诱导孔K=1时,CFRP-A1混合立柱比吸能达到较高水平.通过对关键参数最优值进行耦合,CFRP-A1混合立柱的轴压吸收能量提升了 46.81％,比吸能提升了 49.06％.
To investigate the failure behavior and energy absorption characteristics of carbon fiber reinforced poly-mer(CFRP)-aluminum alloy(Al)open-section hybrid columns under axial load,the combination of quasi-static crushing test and finite element method were employed to analyze the effects of different crucial parameters on axial crushing failure behavior and energy absorption characteristics of CFRP-A1 hybrid columns.The results show that the Al model with single-layer shell adopted the elastic-plastic constitutive and GISSMO damage model,as well as the CFRP model with laminated shell adopted the Chang-Chang intralaminar failure criterion and the B-K interlaminar damage model can accurately simulate the axial crushing failure behavior and energy absorption char-acteristics of CFRP-A1 hybrid columns.Through the analysis of crucial parameters such as relative thickness ratio,fillet ratio,opening angle,gradient and induced hole,the specific energy absorption of CFRP-A1 hybrid columns reaches a higher level with the relative thickness ratio η=67％,fillet ratio y=50％,opening angle θ=120°,gradient T=8,and induced hole K=l.By coupling the optimal values of the crucial parameters,the axial crushing energy absorption of the CFRP-A1 hybrid column increases by 46.81％,and the specific energy absorption increases by 49.06％.

CFRP-Al hybrid columnsaxial crushing testnumerical simulationfailure behaviorenergy absorp-tion characteristics

牟浩蕾、陈英实、赵祎明、解江、冯振宇

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中国民航大学 科技创新研究院,天津 300300

中国民航大学 安全科学与工程学院,天津 300300

CFRP-Al混合立柱 轴压试验 数值模拟 失效行为 吸能特性

国家重点研发计划项目天津市应用基础研究多元投入基金项目天津市应用基础研究多元投入基金项目中国民航大学波音基金项目

2022YFB430100021JCYBJC0069023JCYBJC0007020240101

2024

10.13801/j.cnki.fhclxb.20240809.001

复合材料学报
北京航空航天大学 中国复合材料学会

复合材料学报

CSTPCD北大核心
影响因子：0.933
ISSN：1000-3851
年,卷(期)：2024.41(9)
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