Study on the Influence of Compression Ratio on the Rail Contact Fatigue Resistance Property and Its Mechanism | Zendy

Zhiqiang Li | Zendy

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Study on the Influence of Compression Ratio on the Rail Contact Fatigue Resistance Property and Its Mechanism

Author(s) -

Zhiqiang Li

Publication year - 2021

Publication title -

computational intelligence and neuroscience

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.605

H-Index - 52

eISSN - 1687-5273

pISSN - 1687-5265

DOI - 10.1155/2021/9057677

Subject(s) - pearlite , materials science , paris' law , composite material , lamellar structure , toughness , fracture (geology) , compression (physics) , microstructure , mechanism (biology) , compression ratio , fatigue limit , structural engineering , crack closure , fracture mechanics , mechanical engineering , engineering , austenite , philosophy , epistemology , internal combustion engine

Contact fatigue resistance properties of four commercial steel rails were systematically studied and compared. The contact fatigue limit cycles, fracture toughness, and fatigue crack growth rate of the corresponding rails with different compression ratios were tested and analyzed, which showed a close relationship between them. Moreover, microstructures of the rails were carefully observed by using the TEM to elucidate the scientific mechanisms. Observations and obtained results indicated that pearlite lamellar spacing further decreased with the rise of compression ratio, which greatly and rightly contributed to the improved fatigue resistance property.

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