[1]何联格,周蓝,苏建强,等.新的蠕变-疲劳耦合损伤下活塞热-机疲劳寿命预测方法[J].内燃机学报,2023,(06):554-560.
　He Liange,Zhou Lan,Su Jianqiang,et al.A New Method for Predicting the Thermo-Mechanical Fatigue Life of Pistons Under Creep-Fatigue Coupling Damage[J].,2023,(06):554-560.
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新的蠕变-疲劳耦合损伤下活塞热-机疲劳寿命预测方法
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《内燃机学报》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2023年06
页码:
554-560
栏目:
出版日期:
2023-11-25

文章信息/Info

Title:
A New Method for Predicting the Thermo-Mechanical Fatigue Life of Pistons Under Creep-Fatigue Coupling Damage
作者:
何联格; 周蓝; 苏建强; 张斌; 石文军
1. 重庆理工大学 汽车零部件先进制造技术教育部重点实验室，重庆 400054；2. 重庆理工大学 车辆工程学院，重庆 400054；3. 重庆青山工业有限责任公司，重庆 402761；4. 精进电动科技股份有限公司，北京 100016
Author(s):
He Liange; Zhou Lan; Su Jianqiang; Zhang Bin; Shi Wenjun
1. Key Laboratory of Advanced Manufacturing Technology for Automobile Parts，Ministry of Education，Chongqing University of Technology，Chongqing 400054，China；2. School of Vehicle Engineering，Chongqing University of Technology，Chongqing 400054，China；3. Chongqing Tsingshan Industrial Company Limited，Chongqing 402761，China；4. Jing-Jin Electric Technologies Company Limited，Beijing 100016，China
关键词:
活塞; 铸铝合金; 蠕变-疲劳; 耦合损伤; 寿命预测
Keywords:
piston; cast aluminum alloy; creep-fatigue; coupling damage; life prediction
分类号:
TK412.4
文献标志码:
A
摘要:
建立了一种新的蠕变-疲劳非线性耦合损伤下铸铝合金材料热-机疲劳寿命预测模型，开展了铸铝合金材料力学性能与蠕变-疲劳试验测试，对寿命预测模型进行了验证. 其次，对比活塞热-机耦合有限元计算结果与温度场测试结果，对有限元模型进行了验证. 最后，用新的热-机疲劳寿命预测模型对活塞的热-机疲劳寿命进行了预测. 结果表明：新的蠕变-疲劳寿命预测模型预测结果均位于2倍误差带内，该模型具备良好的寿命预测能力；活塞热-机蠕变-疲劳耦合损伤中蠕变损伤占比较大，约为53.9％；活塞热-机蠕变-疲劳耦合损伤关键区域位于活塞销座与加强肋连接处，活塞在热-机载荷耦合作用下的热-机疲劳循环寿命为4290，满足可靠性要求.
Abstract:
A new fatigue-creep nonlinear coupling damage prediction model for thermo-mechanical fatigue life of cast aluminum alloy materials was established. The mechanical properties and creep-fatigue tests of cast aluminum alloy materials were carried out，and the life prediction model was verified. Secondly，the finite element model was verified by comparing the calculation results of the piston thermo-mechanical load coupling with the temperature field test results. Finally，the new thermo-mechanical fatigue life prediction model was used to predict the thermo-mechanical fatigue life of the piston. The results show that the prediction results of the new creep-fatigue life prediction model are all within a scatter band of factor two. In the piston thermo-mechanical creep-fatigue coupling damage，the creep damage accounts for a relatively large amount，about 53.9%. The critical area of the thermo-mechanical creep-fatigue coupling damage of the piston is located at the joint between the piston pin boss and the reinforcing rib. The thermo-mechanical fatigue cycle life of the piston under the coupled thermal-mechanical load is 4290，which meets the reliability requirements.

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更新日期/Last Update: 2023-11-25