Abstract
The main objective of this paper is to study the indentation process of the spherical indenter by finite element method (FEM). Elastic-plastic model is established and the effect of metal material properties (plastic modulus, yield strength) on response of load-displacement curve during the loading-unloading process is discussed in detail. FEM results indicate that the maximum indentation depths are smaller with larger plastic modulus. For elastic–perfectly plastic materials, the equivalent plastic strain (EPS) grows with the increase of pressed depth and the plastic impact area is constantly changing. In addition, the generated Max depth decreases with the increase of yield strength under the same load. Besides, friction coefficients have little effect on the indentation process. This research provides a theoretical basis for experiment and engineering.
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