THERMAL-MECHANICAL FATIGUE PREDICTION OF ENGINE CYLINDER HEAD BASED ON THE SEHITOGLU MODEL

ZOU PingPing; JING GuoXi; ZENG XiaoChun; LUO XuWei; YUAN XiaoJun; WEI Tao; LIN YuXing

doi:10.16579/j.issn.1001.9669.2021.05.023

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THERMAL-MECHANICAL FATIGUE PREDICTION OF ENGINE CYLINDER HEAD BASED ON THE SEHITOGLU MODEL

更新时间：2022-09-22

- THERMAL-MECHANICAL FATIGUE PREDICTION OF ENGINE CYLINDER HEAD BASED ON THE SEHITOGLU MODEL
- Journal of Mechanical Strength Vol. 43, Issue 5, Pages: 1184-1190(2021)
- 作者机构：
  
  1. 江铃汽车股份有限公司动力总成开发部
  2. 河北工业大学机械工程学院
  3. 天津市新能源汽车动力传动与安全技术重点实验室
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2021.05.023
  CLC：
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ZOU PingPing, JING GuoXi, ZENG XiaoChun, et al. THERMAL-MECHANICAL FATIGUE PREDICTION OF ENGINE CYLINDER HEAD BASED ON THE SEHITOGLU MODEL. [J]. 43(5):1184-1190(2021)
DOI：

ZOU PingPing, JING GuoXi, ZENG XiaoChun, et al. THERMAL-MECHANICAL FATIGUE PREDICTION OF ENGINE CYLINDER HEAD BASED ON THE SEHITOGLU MODEL. [J]. 43(5):1184-1190(2021) DOI： 10.16579/j.issn.1001.9669.2021.05.023.

摘要

以某发动机气缸盖为研究对象,开展了气缸盖本体材料力学性能测试与表征、气缸盖热机疲劳寿命预测研究工作。采用流固耦合方法,获得了准确的气缸盖热边界和温度场结果,温度场计算值与实测结果相符合。依照整机热冲击试验规范,采用Sehitoglu模型对缸盖的热机疲劳寿命进行了预测,仿真结果显示,缸盖最低寿命出现在第二缸火力面排气侧鼻梁区,主要由环境损伤引起,最低寿命为6 860次,满足设计要求,该气缸盖顺利通过整机热机疲劳台架试验考核。

Abstract

The research work was carried out on the mechanical performance testing and characterization of an engine cylinder head material,and the prediction of the cylinder head thermal engine fatigue life. The fluid-solid coupling method was used to obtain accurate results of the thermal boundary and temperature field of the cylinder head. The calculated temperature field is consistent with the measured results. According to the thermal shock test specifications of the whole machine,the Sehitoglu model was used to predict the thermal fatigue life of the cylinder head. The simulation results show that the minimum life of the cylinder head occurs in the nose bridge area on the exhaust side of the second cylinder fire surface,which is mainly caused by environmental damage. The service life is 6 860,which meets the design requirements. At the same time,the cylinder head has successfully passed the heat engine fatigue bench test of the whole machine.

关键词

发动机气缸盖热机疲劳寿命预测

Keywords

Internal combustion engineCylinder headThermal mechanical fatigueLife prediction

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