| Characterization of EBPVD micro-layer composites and simulation of its internal stress state |
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| 作者姓名： | 史丽萍 赫晓东 |
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| 作者单位： | CenterforCompositeMaterialsandStructure,HarbinInstituteofTechnology,Harbin150001,China |
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| 基金项目： | Project(50304007) supported by the National Natural Science Foundation of China |
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| 摘 要： | Based on the basic operating principal and the technology characteristic of electron beam physical vapor deposition(EBPVD) technique, EBPVD was used to prepare the micro-layer composites. The effect on the substrate preheating temperature was taken into accounts and the finite element analysis package ANSYS was used to simulate the internal stress field and the potential displacement changing tendency. The results show that one of the most important quality factors on the judgment of micro-layer composites is the adhesion between the substrate and the deposition layers as well as among the different deposition layers. Besides the existance of temperature gradient through the thickness of layers, the main reason for the internal stress in micro-layer composites is the mismatch of various properties of the layer and the substrate of different thermal expansions and crystal lattice types. With the increase of substrate preheating temperature, the inter-laminar shear stress also takes on a tendency of increase but the axial residual stress decrease.
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| 关 键 词： | EBPVD 微层复合 电子束物理汽相淀积 残留应力 有限元分析 |
| 收稿时间： | 10 October 2004 |
| 修稿时间： | 25 November 2004 |
Characterization of EBPVD micro-layer composites and simulation of its internal stress state |
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| Shi Li-ping,and He Xiao-dong.Characterization of EBPVD micro-layer composites and simulation of its internal stress state[J].Journal of Central South University of Technology,2005,12(1):27-30. |
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| Authors: | Shi Li-ping and He Xiao-dong |
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| Affiliation: | (1) Center for Composite Materials and Structure, Harbin Institute of Technology, 150001 Harbin, China |
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| Abstract: | Based on the basic operating principal and the technology characteristic of electron beam physical vapor deposition(EBPVD) technique, EBPVD was used to prepare the micro-layer composites. The effect on the substrate preheating temperature was taken into accounts and the finite element analysis package ANSYS was used to simulate the internal stress field and the potential displacement changing tendency. The results show that one of the most important quality factors on the judgment of micro-layer composites is the adhesion between the substrate and the deposition layers as well as among the different deposition layers. Besides the existance of temperature gradient through the thickness of layers, the main reason for the internal stress in micro-layer composites is the mismatch of various properties of the layer and the substrate of different thermal expansions and crystal lattice types. With the increase of substrate preheating temperature, the inter-laminar shear stress also takes on a tendency of increase but the axial residual stress decrease. |
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| Keywords: | micro-layer composites electron beam physical vapor deposition residual stress field finite element analysis |
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