首页|基于多尺度损伤机制的CFRP铝合金粘接板冲击行为研究

基于多尺度损伤机制的CFRP铝合金粘接板冲击行为研究

Research on impact behavior of CFRP aluminum alloy adhesive plate based on multiscale damage mechanism

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碳纤维增强聚合物(CFRP)铝合金粘接板作为一种轻质高强的材料,被广泛用在飞机、汽车、高速列车等轻量化结构上.研究首先基于纤维/基体微观尺度建立代表性体积单元(RVE)单胞模型,预测单向CFRP的基本弹性力学参数,并通过RVE模型施加宏观单位载荷计算宏-微观应力放大系数.其次考虑纤维基体微观失效准则与演化规律,开发复合材料宏-微观渐进损伤演化程序,再结合金属与复合材料粘接面的损伤模型,建立多尺度损伤机制的CFRP铝合金粘接板冲击仿真模型,并通过实验验证了数值模型的准确性与可靠性.最后通过数值模拟对CFRP铝合金粘接板在不同纤维铺层角度与不同纤维体积分数下的抗冲击行为进行参数化研究,结果表明纤维铺层方向对粘接板的抗冲击力学性能影响不大,而纤维体积分数对结构的冲击行为影响较大.
Carbon fiber reinforced polymer(CFRP)aluminum alloy adhesive plate is a lightweight and high-strength material,which has been widely applied in lightweight structures,such as airplanes,cars,and high-speed trains.This research first established an representative volume element(RVE)single cell model based on the micro-scale from fiber/matrix,predicted the elastic mechanical parameters of unidirectional CFRP,and calculated the macro-micro stress amplification coefficient by applying a macroscopic unit load to the RVE model.Secondly,con-sidering the micro-failure criteria and evolution rules of fiber and matrix,the macro-micro progressive damage evolution program of CFRP unidirectional plates was developed.Then combining with the damage model of metal and adhesive interface,a multiscale damage mechanism impacted model of CFRP aluminum alloy adhesive plate was established,then the accuracy and reliability of the numerical model were verified through the experimental tests.Finally,based on the numerical simulation,the influences of fiber angle and fiber volume fraction on the im-pact behavior of CFRP aluminum alloy adhesive plate were studied in detail.The results show that the fiber layup direction has little effect on the impact mechanical performance of the adhesive plate,while the fiber volume frac-tion has a greater effect on the impact behavior of the structure.

CFRP aluminum alloy adhesive platecomposite materiallow-velocity impactmicroscopic failuremultiscale simulation

姚潞、何文涛、马岩、于航、王艳超、许家婧

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南通大学 交通与土木工程学院,南通 226019

中国海洋大学 工程学院,青岛 266100

南通大学纺织服装学院,南通 226019

CFRP铝合金粘接板 复合材料 低速冲击 微观失效 多尺度模拟

国家自然科学基金国家自然科学基金国家自然科学基金江苏省自然科学基金江苏省高校自然科学研究项目南通市科技计划面上研究项目

520713085187924852105153BK2022137821KJB570009MS22022103

2024

10.13801/j.cnki.fhclxb.20230904.001

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(4)
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