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Visual simulation of fatigue crack growth

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Abstract

An attempt has been made to visually simulate fatigue crack propagation from a precrack. An integrated program was developed for this purpose. The crack-tip shape was determined at four load positions in the first load cycle. The final shape was a blunt front with an “ear” profile at the precrack tip. A more general model, schematically illustrating the mechanism of fatigue crack growth and striation formation in a ductile material, was proposed based on this simulation. According to the present model, fatigue crack growth is an intermittent process; cyclic plastic shear strain is the driving force applied to both state I and II crack growth. No fracture mode transition occurs between the two stages in the present study. The crack growth direction alternates, moving up and down successively, producing fatigue striations. A brief examination has been made of the crack growth path in a ductile two-phase material.

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Authors and Affiliations

  1. the Department of Computer Administration, York College, 11451, Jamaica, NY

    Shuanzhu Wang (Computer Associate (III)

  2. the Department of Civil and Environmental Engineering, Polytechnic University, 11201, Brooklyn, NY

    Harold Margolin (Distinguished Research Professor) & Fengbao Lin (Associate Professor)

Authors
  1. Shuanzhu Wang
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  2. Harold Margolin
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  3. Fengbao Lin
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Wang, S., Margolin, H. & Lin, F. Visual simulation of fatigue crack growth. Metall Mater Trans A 29, 1923–1931 (1998). https://doi.org/10.1007/s11661-998-0017-1

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  • DOI: https://doi.org/10.1007/s11661-998-0017-1

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