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<p>Depressed-center thin grinding wheels are widely used in industries such as automotive, aerospace, and metal fabrication for heavy stock removal. Despite their widespread use, delamination poses a significant challenge. The lack of standardized testing procedures hinders the assessment of delamination characteristics. Hence, the current study attempts to find a link between the delamination behavior and the flexural response of depressed-center thin grinding wheels under monotonic and cyclic loading conditions. Mechanical properties of the three thin wheel variants, namely control and two engineered defect wheels, were investigated using flexural strength, flexural toughness, and stiffness degradation as quantifying parameters for performance evaluation. The control specimens exhibited a mean flexural strength of 65.59 ± 2.76&#xa0;MPa, which was 39% and 56% higher than that of the defect (2.5 GFD) and defect (2 GFD) specimens, respectively. Similarly, their mean flexural toughness (1664.24 ± 102.29&#xa0;N&#xa0;mm) exceeded those of the defect (2.5 GFD) and defect (2 GFD) specimens by 52% and 61%, respectively. Additionally, stiffness degradation at the fatigue load level of 200&#xa0;N for the control wheels was observed to be 15.52 ± 3.36%, indicating superior fatigue resistance compared to the defect variants. Post-flexural testing optical micrograph examination revealed distinct failure modes, including transverse matrix cracking and delamination in the defect wheels. Experimental findings revealed that the thin wheels with weak interfaces (defect wheels) performed poorly, displaying lower magnitudes across all investigated parameters than control wheels. In conclusion, the presented experimental approach, involving flexural testing and optical micrograph analysis, identifies critical indicators of the thin wheel’s susceptibility to delamination and offers a promising methodology for assessing the delamination characteristics of the grinding wheel without the need for extensive field trials.</p>

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Evaluation of Flexural Performance of Depressed-Center Thin Grinding Wheels and Exploring its Potential Link to Delamination

  • 期刊论文

  • 发表日期：

    2025年8月6日

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  • Venkata Sai Prabhu Suraj Nanduru,
  • Kumaran Thirumalai,
  • Shyam Komath,
  • Amitava Ghosh

摘要

Depressed-center thin grinding wheels are widely used in industries such as automotive, aerospace, and metal fabrication for heavy stock removal. Despite their widespread use, delamination poses a significant challenge. The lack of standardized testing procedures hinders the assessment of delamination characteristics. Hence, the current study attempts to find a link between the delamination behavior and the flexural response of depressed-center thin grinding wheels under monotonic and cyclic loading conditions. Mechanical properties of the three thin wheel variants, namely control and two engineered defect wheels, were investigated using flexural strength, flexural toughness, and stiffness degradation as quantifying parameters for performance evaluation. The control specimens exhibited a mean flexural strength of 65.59 ± 2.76 MPa, which was 39% and 56% higher than that of the defect (2.5 GFD) and defect (2 GFD) specimens, respectively. Similarly, their mean flexural toughness (1664.24 ± 102.29 N mm) exceeded those of the defect (2.5 GFD) and defect (2 GFD) specimens by 52% and 61%, respectively. Additionally, stiffness degradation at the fatigue load level of 200 N for the control wheels was observed to be 15.52 ± 3.36%, indicating superior fatigue resistance compared to the defect variants. Post-flexural testing optical micrograph examination revealed distinct failure modes, including transverse matrix cracking and delamination in the defect wheels. Experimental findings revealed that the thin wheels with weak interfaces (defect wheels) performed poorly, displaying lower magnitudes across all investigated parameters than control wheels. In conclusion, the presented experimental approach, involving flexural testing and optical micrograph analysis, identifies critical indicators of the thin wheel’s susceptibility to delamination and offers a promising methodology for assessing the delamination characteristics of the grinding wheel without the need for extensive field trials.