Application of a Mechanism-Based Short Crack Growth Model for the Fatigue Analysis of an Engine Cylinder Block Including Low-Frequency Thermal and High-Frequency Dynamic Loading

Cast aluminum cylinder blocks are frequently used in gasoline and diesel internal combustion engines because of their light-weight advantage. However, the disadvantage of aluminum alloys is their relatively low strength and fatigue resistance which make aluminum blocks prone to fatigue cracking. Engine blocks must withstand a combination of low-cycle fatigue (LCF) thermal loads and high-cycle fatigue (HCF) combustion and dynamic loads. Reliable computational methods are needed that allow for accurate fatigue assessment of cylinder blocks under this combined loading. In several publications, the mechanism-based thermomechanical fatigue (TMF) damage model DTMF describing the growth of short fatigue cracks has been extended to include the effect of both LCF thermal loads and superimposed HCF loadings. This approach is applied to the finite life fatigue assessment of an aluminum cylinder block. The required material properties related to LCF are determined from uniaxial LCF tests. The additional material properties required for the assessment of superimposed HCF are obtained from the literature for similar materials. The predictions of the model agree well with engine dyno test results. Finally, some improvements to the current process are discussed.

• Record URL:
  • https://doi.org/10.4271/2023-01-0595
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
• Supplemental Notes:
  • Abstract reprinted with permission of SAE International.
• Authors:
  • Hazime, Radwan
  • Kobaissy, Ali-Alhadi
  • Seifert, Thomas
  • Zheng, Qichao
  • Chang, Cherng-Chi
• Conference:
  • WCX SAE World Congress Experience
  • Location: Detroit Michigan, United States
  • Date: 2023-4-18 to 2023-4-20
• Publication Date: 2023-4-11

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Serial:
  • SAE Technical Paper
  • Publisher: Society of Automotive Engineers (SAE)
  • ISSN: 0148-7191
  • EISSN: 2688-3627
  • Serial URL: http://papers.sae.org/

Subject/Index Terms

• TRT Terms: Aluminum; Aluminum alloys; Combustion; Engine cylinders; Engines; Fatigue (Mechanics); Properties of materials
• Subject Areas: Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01879918
• Record Type: Publication
• Source Agency: SAE International
• Report/Paper Numbers: 2023-01-0595
• Files: TRIS, SAE
• Created Date: Apr 19 2023 4:35PM