Material characterization based on dual indenters

作者：Swaddiwudhipong S^*; Tho KK; Liu ZS; Zeng K

来源：International Journal of Solids and Structures, 2005, 42(1): 69-83.

DOI：10.1016/j.ijsolstr.2004.07.027

• dual indenters
• finite element analysis
• load-displacement indentation
• material characterization
• plastic deformation

Extensive large strain-large deformation finite element analyses were carried out to investigate the response of elasto-plastic materials obeying power law-strain hardening during the loading and unloading process of instrumented indentation with conical indenters of different apex angles. The relationships between the characteristics of the indentation load-displacement curves and the elasto-plastic material properties were computationally established. A reverse analysis algorithm based on load-displacement curves obtained from dual indenters was presented. It was demonstrated that the proposed reverse analysis algorithm can uniquely recover the elasto-plastic material properties from the load-displacement curves of two conical indenters with different apex angles. The numerical results obtained are in good agreement with published values.

• 出版日期2005-1