Sun Wei,Zhang Shuting*,Du Kaiping,et al.Design and simulation research of electroplated coating on piston top of gasoline engine[J].Plating & Finishing,2023,(2):79-85.[doi:10.3969/j.issn.1001-3849.2023.02.013]
汽油机活塞顶面镀层的设计与仿真研究
- Title:
- Design and simulation research of electroplated coating on piston top of gasoline engine
- Keywords:
- piston ; composite coatings ; 3D thermodynamic coupling ; finite element analysis ; coating properties ; interfacial stress
- 分类号:
- TG 174.441
- 文献标志码:
- A
- 摘要:
- 基于有限元软件 ABAQUS 建立了镀层 - 活塞的三维几何模型，采用顺序热力耦合的有限元分析法，系统研究了镀层厚度、弹性模量和导热系数对活塞 - 镀层界面峰值应力的影响。结果表明：当镀层厚度在 100~200 μ m 时，活塞 - 镀层界面峰值应力随镀层厚度的增大而增加，从 163 MPa 增加至 212 MPa ，增大了 30.06 % ；当镀层弹性模量在 200~600 GPa 时，活塞 - 镀层界面峰值应力随镀层弹性模量的增大而增加，从 104 MPa 增加至 175 MPa ，增大了 68.27 % ；当涂层导热系数在 50~400 W·m -1 ·K -1 时，活塞 - 镀层界面峰值应力随镀层导热系数的增大而基本保持不变，约为 171 MPa 。综合考虑活塞顶面的性能需求，依据界面峰值应力与镀层结合状态的演变机理并结合实际电镀工艺：镀层厚度以 150 μ m 左右为宜，弹性模量以 SiC 类复合镀层材料的 400~600 GPa 为宜。导热系数对薄涂层活塞应力场的影响十分有限。
- Abstract:
- ： The effects of the coating thickness ， elastic modulus and thermal conductivity on the peak stress of the piston-coating interface were systematically studied by the finite element analysis method with sequential thermodynamic coupling. A three-dimensional geometric model of the coating and piston was established by using the finite element software ABAQUS. The simulation results show that when the coating thickness is 100?200 μ m ， the peak stress of the interface increases from 163 MPa to 212 MPa with the increase of the coating thickness ， increasing by 30.06 %. When the elastic modulus of the coating is 200?600 GPa ， the peak stress of the interface increases from 104 MPa to 175 MPa with the increase of elastic modulus ， increasing by 68.27 %. When the thermal conductivity of the coating is in the range of 50?400 W·m -1 ·K -1 ， the peak stress of the interface almost remains unchanged with the increase of thermal conductivity of the coating ， which is about 171 MPa. Considering the performance requirements of the piston top surface ， the evolution mechanism of interface peak stress and coating bonding state ， and the actual electroplating process ， it can be concluded that the optimal coating thickness is about 150 μ m ， and the optimal elastic modulus is 400?600 GPa of composite coatings with SiC. The influence of thermal conductivity on the stress field of thin-coated piston is very limited.
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备注/Memo
收稿日期： 2021-12-29 修回日期： 2022-02-25 作者简介： 孙伟（ 1997 —），男，硕士研究生， email ： 2019315010104@mail.ncut.edu.cn * 通信作者： 张淑婷（ 1978 —），女，博士，教授， email ： zhangst@ncut.edu.cn 基金项目： 国家重点研发计划（ 2018YFB2002000 ）；北京市基金 - 市教委联合资助项目（ KZ201910009010 ）；北方工业大学高层次人才科研启动项目（ XN277 ； 110051360002 ）；毓杰团队项目（ XN212/009 ）