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http://dx.doi.org/10.3795/KSME-A.2012.36.1.081

Transient Creep Analysis in Indentation Tests  

Lee, Jin-Haeng (Korea Atomic Energy Research Institute)
Lee, Hyung-Yil (Dept. of Mechanical Engineering, Sogang Uinv.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.36, no.1, 2012 , pp. 81-90 More about this Journal
Abstract
The indentation test, which is one of the testing methods for evaluating the mechanical properties of materials, can be applied to the evaluation of creep properties. Many studies related to the indentation creep test, however, have just focused on the characteristics of the steady-state creep, so there are wide discrepancies between the uniaxial test and the indentation test. To obtain accurate creep properties, it is therefore important to consider the effects of transient creep. In the present work, the Ogbonna et al.'s work on the spherical indentation test including the transient creep was expanded and applied to the conical indentation creep test. The characteristics of the transient creep were analyzed via finite element simulations and compared with those obtained through spherical indentation. Other effects, such as elastic strain, indenter shape, contact area, and representative strain, which have not been considered properly in prior studies on the creep test, are also discussed.
Keywords
Creep; Indentation; FEA;
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