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Fatigue crack initiation and strength evaluation of cast Al-Si alloy cylinder head
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Peirong Ren1, Zhengxing Zuo1, Weiqing Huang1, Chengzhang Zhao1, Haitao Zhou2, Huihua Feng1
Transactions of CSICE | 2025, 43(5) : 469 - 479
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Transactions of CSICE | 2025, 43(5): 469-479
Fatigue crack initiation and strength evaluation of cast Al-Si alloy cylinder head
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Peirong Ren1, Zhengxing Zuo1, Weiqing Huang1, Chengzhang Zhao1, Haitao Zhou2, Huihua Feng1
Affiliations
  • 1.School of Mechanical Engineering，Beijing Institute of Technology，Beijing 100081，China
  • 2.China North Engine Research Institute，Tianjin 300400，China
Published: 2025-09-25 doi: 10.16236/j.cnki.nrjxb.202505053
Outline
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In order to deal with the challenges in predicting the high cycle fatigue(HCF) crack initiation life of cast Al-Si alloy cylinder head, the impact of pore characteristics on the mechanical response of cast Al-Si alloy was investigated through a representative volume element model containing the pore. The relationship between pore size and the non-local maximum plastic shear strain amplitudewas established. The HCF strength of the cylinder head was evaluated based on the obtained model. The findings reveal a significant level of stress concentration at the local complex concave and convex positions of large pores. The harmfulness of pores is primarily determined by their size. With the increase in pore size, experiences an accelerated growth. The HCF life of samples extracted from the cylinder head can be predicted within ±2.5 times dispersion band using the crack initiation model driven by. The bottom plate, the inlet and the exhaust walls are the main parts of the cylinder head with high mechanical stress. The combination of high stress and large pores results in a low HCF life of the inlet wall.

cylinder head  /  cast Al-Si alloy  /  high cycle fatigue(HCF)  /  crack initiation  /  strength evaluation
任培荣, 左正兴, 黄渭清, 赵承章, 周海涛, 冯慧华. 铝硅合金气缸盖疲劳裂纹萌生与强度评估. 内燃机学报, 2025 , 43 (5) : 469 -479 . DOI: 10.16236/j.cnki.nrjxb.202505053
Peirong Ren, Zhengxing Zuo, Weiqing Huang, Chengzhang Zhao, Haitao Zhou, Huihua Feng. Fatigue crack initiation and strength evaluation of cast Al-Si alloy cylinder head[J]. Transactions of CSICE, 2025 , 43 (5) : 469 -479 . DOI: 10.16236/j.cnki.nrjxb.202505053
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Year 2025 volume 43 Issue 5
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Article Info
doi: 10.16236/j.cnki.nrjxb.202505053
  • Receive Date：2024-12-28
  • Online Date：2026-11-05
  • Published：2025-09-25
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  • Received：2024-12-28
  • Revised：2025-05-24
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Affiliations
    1.School of Mechanical Engineering，Beijing Institute of Technology，Beijing 100081，China
    2.China North Engine Research Institute，Tianjin 300400，China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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