ArticleScientific reports2025
An improved NG-F model for capturing the three types of indentation size effect.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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3 authors.
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Abstract
Experimental studies indicate that three types of ISE are observed. However, developing a model to capture three types of ISE is one challenging task in materials science. In this paper, the relationship between k and h (k is the ratio of the plastic zone radius to the contact radius, and h is the indentation depth) is systematically analyzed. Then, an exponential decay function is modified to capture the relationship between k and h. The modified exponential decay function can accurately describe the nonlinear relationship between k and h. However, the modified exponential decay function still fails to capture the complex relationship between k and h. On this basis, the NG-F Model is improved with the modified exponential decay function. An analysis has been done to comprehensive comprehension the influence of the parameters on the improved NG-F model. The parameter analysis has been qualitatively proved that the improved NG-F model can capture three types of ISE. The competition between the relative rate of change of k
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