TY  - EJOU
AU  - Chen, Jian  
AU  - Yuan, Huang  
AU  - Wittmann, Folker H.  

TI  - Computational Simulations of Micro-Indentation Tests Using Gradient Plasticity
T2  - Computer Modeling in Engineering \& Sciences

PY  - 2002
VL  - 3
IS  - 6
SN  - 1526-1506

AB  - Experimental observation confirms that micro-hardness of metallic materials depends significantly on the indentation depth. In the present paper we discuss simulations of micro-indentation tests based on the gradient plasticity model using the finite element method. The role of intrinsic material length parameters in the gradient plasticity model is investigated. The computational results confirm that the gradient plasticity model is suitable to simulate micro-indentation tests and predicts the depth-dependent hardness in micro- and nano-indentations. Variations of micro-hardness is correlated with the intrinsic material length parameters.
KW  - Gradient-dependent plasticity
KW  -  intrinsic material length
KW  -  plastic strain gradients
KW  -  size effects
KW  -  micro-indentation
KW  -  finite element method

DO  - 10.3970/cmes.2002.003.743