| Finite element analysis on stresses field of normalized layer thickness within ceramic coating on aluminized steel |
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| 作者姓名： | 吴振强 夏原 李光 徐方涛 |
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| 作者单位： | Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China |
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| 摘 要： | Multilayer ceramic coatings were fabricated on steel substrate using a combined technique of hot dipping aluminum（HDA） and plasma electrolytic oxidation（PEO）. A triangle of normalized layer thickness was created for describing thickness ratios of HDA/PEO coatings. Then, the effect of thickness ratio on stresses field of HDA/PEO coatings subjected to uniform normal contact load was investigated by finite element method. Results show that the surface tensile stress is mainly affected by the thickness ratio of AI layer when the total thickness of coating is unchanged. With the increase of AI layer thickness, the surface tensile stress rises quickly. When Al2O3 layer thickness increases, surface tensile stress is diminished. ＇Meanwhile, the maximum shear stress moves rapidly towards internal part of HDA/PEO coatings. Shear stress at the Al2O3/Al interface is minimal when Al2O3 layer and AI layer have the same thickness.
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| 关 键 词： | 标准厚度 多层涂料 有限元方法 界面应力 |
| 收稿时间： | 14 December 2006 |
| 修稿时间： | 2006-12-14 |
Finite element analysis on stresses field of normalized layer thickness within ceramic coating on aluminized steel |
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| WU Zhen-qiang,XIA Yuan,LI Guang,XU Fang-tao.Finite element analysis on stresses field of normalized layer thickness within ceramic coating on aluminized steel[J].Transactions of Nonferrous Metals Society of China,2007,17(5):934-939. |
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| Authors: | WU Zhen-qiang XIA Yuan LI Guang XU Fang-tao |
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| Affiliation: | Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | Multilayer ceramic coatings were fabricated on steel substrate using a combined technique of hot dipping aluminum(HDA)and plasma electrolytic oxidation(PEO). A triangle of normalized layer thickness was created for describing thickness ratios of HDA/PEO coatings. Then, the effect of thickness ratio on stresses field of HDA/PEO coatings subjected to uniform normal contact load was investigated by finite element method. Results show that the surface tensile stress is mainly affected by the thickness ratio of Al layer when the total thickness of coating is unchanged. With the increase of Al layer thickness, the surface tensile stress rises quickly. When Al2O3 layer thickness increases, surface tensile stress is diminished. Meanwhile, the maximum shear stress moves rapidly towards internal part of HDA/PEO coatings. Shear stress at the Al2O3/Al interface is minimal when Al2O3 layer and Al layer have the same thickness. |
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| Keywords: | normalized layer thickness multilayer coatings interracial stresses finite element method(FEM) |
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