基于连续损伤力学的铝车身涂层抗划伤能力
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摘要
开展了基于连续损伤力学(CDM)的涂层抗划伤能力仿真研究,建立了损伤力学材料模型。通过有限元软件ABAQUS提供的子程序(VUMAT)接口,将该材料模型嵌入到ABAQUS求解器。以裂纹横穿涂层的压头反力来衡量涂层的抗划伤能力,预测涂层抗划伤能力。研究发现:用所建立的自定义材料模型对涂层划伤进行分析,不仅可以得到涂层的应力分布,而且可以预测涂层在载荷作用下裂纹的产生和扩展趋势;涂层对划伤速度高的载荷具有更高的抵抗划伤能力,涂层厚度对涂层抗划伤能力也有一定影响;而基体材料性能和基体厚度对涂层抗划伤能力的影响很小,研究结论可以为涂层材料的优化设计提供理论支持。
Continuum Damage Mechanics(CDM) was introduced into the finite element analysis of scratch resistance of coatings. Firstly, a damage mechanics based on the material model was created. Secondly,this material model was implemented into ABAQUS solver through user defined subroutine VUMAT.Finally, a series of analyses were carried out to analyze the mechanical behavior of coatings. The material model could be used not only to capture the stress distribution of coatings, but also to predict the damage evolution of coatings under scratch loading. In addition, it is found that the loading speed and coating thickness have certain effects on scratch resistance, but the properties and thickness of substrate have little effect on it. The theoretical support was provided for the optimal design of the coating material.
Continuum Damage Mechanics(CDM) was introduced into the finite element analysis of scratch resistance of coatings. Firstly, a damage mechanics based on the material model was created. Secondly,this material model was implemented into ABAQUS solver through user defined subroutine VUMAT.Finally, a series of analyses were carried out to analyze the mechanical behavior of coatings. The material model could be used not only to capture the stress distribution of coatings, but also to predict the damage evolution of coatings under scratch loading. In addition, it is found that the loading speed and coating thickness have certain effects on scratch resistance, but the properties and thickness of substrate have little effect on it. The theoretical support was provided for the optimal design of the coating material.
引文
[1]Christopher S,Nietering K,Nichols M.An overview of the scratch resistance of automotive coatings:exterior clearcoats and polycarbonate hardcoats[J].Coatings,2012,2(4):221-234.
[2]Browning R,Sue H J,Minkwitz R,et al.Effects of acrylonitrile content and molecular weight on the scratch behavior of styrene-acrylonitrile random copolymers[J].Polymer Engineering&Science,2011,51(11):2282-2294.
[3]Hainsworth S,Kilgallon P.Temperature variant scratch deformation response of automotive paint systems[J].Progress in Organic Coatings,2008,62(9):21-27.
[4]Inaba H.Applications of numerical analysis to the evaluation of scratch resistance for automotive clear coatings[J].Pigments Paints&Printing Inks,2010,83(11):449-457.
[5]Felder E,Bucaille J L,Hochstetter G.Influence of the rheology of polymers on their scratch resistance:Experimental and numerical simulation studies[J].Annales de Chimie Science des Matériaux,2011,28(3):15-28.
[6]庄蔚敏,陈延红.基于连续损伤力学的表面涂层损伤模拟[J].吉林大学学报:工学版,2012,42(4):857-862.Zhuang Wei-min,Chen Yan-hong.Research on the failure of surface coatings based on continuum damage mechanics[J].Journal of Jilin University(Engineering and Technology Edition),2012,42(4):857-862.
[7]Lemaitre J.Engineering Damage Mechanics[M].Berlin:Springer Berlin Heidelberg,2010.
[8]Lin J,Havhurst D,Dyson B.A new design of uniaxial testpiece with slit extensometer ridges for improved accuracy of strain measurement[J].International Journal of Mechnical Sciences,1993,35(1):63-78.
[9]Lin J,Liu Y,Farrugia D,et al.Development of dislocation based-unified material model for simulating microstructure evolution in multipass hot rolling[J].Philosophical Magazine A,2005,85(18):1967-1987.
[10]Li B,Lin J,Yao X.A novel evolutionary algorithm for determining unified creep damage constitutive equations[J].International Journal of Mechanical Sciences,2002,44(2):987-1002.
[11]Cao J,Lin J.A study on formulation of objective functions for determining material models[J].International Journal of Mechanical Sciences,2008,50(7):193-204.
[12]刘大海,于海平,李春峰,等.AA5052板材准静态/动态平面应变成形极限实验研究[J].材料科学与工艺,2009,17(5):593-596.Liu Da-hai,Yu Hai-ping,Li Chun-feng,et al.Experimental investigation on forming limits of AA5052sheet in hybrid quasi-static/dynamic plane-strain tensile process[J].Materials Science and Technology,2009,17(5):593-596.
[13]Amini K,Altenhof W,Yuen S C K,et al.Experimental and numerical investigation on the deformation and energy dissipation of AA6061-T6 circular extrusion subjected to blast loading[J].International Journal of Impact Engineering,2017,110:228-241.
[14]罗正怡.汽车涂层力学性能测试及分析[D].成都:西南交通大学力学与工程学院,2009.Luo Zheng-yi.Testing and analysis of mechanical properties for automotive coatings[D].Chengdu:School of Mechanics and Engineering,Southwest Jiaotong University,2009.
[2]Browning R,Sue H J,Minkwitz R,et al.Effects of acrylonitrile content and molecular weight on the scratch behavior of styrene-acrylonitrile random copolymers[J].Polymer Engineering&Science,2011,51(11):2282-2294.
[3]Hainsworth S,Kilgallon P.Temperature variant scratch deformation response of automotive paint systems[J].Progress in Organic Coatings,2008,62(9):21-27.
[4]Inaba H.Applications of numerical analysis to the evaluation of scratch resistance for automotive clear coatings[J].Pigments Paints&Printing Inks,2010,83(11):449-457.
[5]Felder E,Bucaille J L,Hochstetter G.Influence of the rheology of polymers on their scratch resistance:Experimental and numerical simulation studies[J].Annales de Chimie Science des Matériaux,2011,28(3):15-28.
[6]庄蔚敏,陈延红.基于连续损伤力学的表面涂层损伤模拟[J].吉林大学学报:工学版,2012,42(4):857-862.Zhuang Wei-min,Chen Yan-hong.Research on the failure of surface coatings based on continuum damage mechanics[J].Journal of Jilin University(Engineering and Technology Edition),2012,42(4):857-862.
[7]Lemaitre J.Engineering Damage Mechanics[M].Berlin:Springer Berlin Heidelberg,2010.
[8]Lin J,Havhurst D,Dyson B.A new design of uniaxial testpiece with slit extensometer ridges for improved accuracy of strain measurement[J].International Journal of Mechnical Sciences,1993,35(1):63-78.
[9]Lin J,Liu Y,Farrugia D,et al.Development of dislocation based-unified material model for simulating microstructure evolution in multipass hot rolling[J].Philosophical Magazine A,2005,85(18):1967-1987.
[10]Li B,Lin J,Yao X.A novel evolutionary algorithm for determining unified creep damage constitutive equations[J].International Journal of Mechanical Sciences,2002,44(2):987-1002.
[11]Cao J,Lin J.A study on formulation of objective functions for determining material models[J].International Journal of Mechanical Sciences,2008,50(7):193-204.
[12]刘大海,于海平,李春峰,等.AA5052板材准静态/动态平面应变成形极限实验研究[J].材料科学与工艺,2009,17(5):593-596.Liu Da-hai,Yu Hai-ping,Li Chun-feng,et al.Experimental investigation on forming limits of AA5052sheet in hybrid quasi-static/dynamic plane-strain tensile process[J].Materials Science and Technology,2009,17(5):593-596.
[13]Amini K,Altenhof W,Yuen S C K,et al.Experimental and numerical investigation on the deformation and energy dissipation of AA6061-T6 circular extrusion subjected to blast loading[J].International Journal of Impact Engineering,2017,110:228-241.
[14]罗正怡.汽车涂层力学性能测试及分析[D].成都:西南交通大学力学与工程学院,2009.Luo Zheng-yi.Testing and analysis of mechanical properties for automotive coatings[D].Chengdu:School of Mechanics and Engineering,Southwest Jiaotong University,2009.