Significant Influence on Residual Bending Strength by Cracks Generation During Grinding of Ceramics

Abstract Any product must undergo precise manufacturing before use. The damage incurred during the manufacturing process can significantly impact the residual strength of the product post-manufacturing. However, the relationship between residual bending strength and manufacturing-induced damage remains unclear, despite being a crucial parameter for assessing material service life and performance, leading to a decrease in product performance reliability. This study focuses on investigating the impact of crack generation on residual bending strength through theoretical and experimental analyses of scratching, grinding, and three-point bending. The research first elucidates the forms and mechanisms of material damage through scratch experiments. Subsequently, using resin-bonded and electroplated wheels as case studies, the influence of different process parameters on grinding damage and residual bending strength is explored. The reduction of brittle removal can lead to a 50%–60% decrease in residual bending strength. Lastly, a model is developed to delineate the relationship between processing parameters and the residual bending strength of the product, with the model exhibiting an error margin of less than 11%. This model clearly reveals the effect of crack generation under different process parameters on residual flexural strength.