Record number :
2149683
Title of article :
Methods of obtaining instantaneous modulus of viscoelastic solids using displacement-controlled instrumented indentation with axisymmetric indenters of arbitrary smooth profiles
Author/Authors :
Cheng، نويسنده , , Yang-Tse and Cheng، نويسنده , , Che-Min and Ni، نويسنده , , Wangyang، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2006
Pages :
6
From page :
2
To page :
7
Abstract :
We derive a relationship between the initial unloading slope, contact depth, and the instantaneous relaxation modulus for displacement-controlled indentation in linear viscoelastic solids by a rigid indenter with an arbitrary axisymmetric smooth profile. While the same expression is well known for indentation in elastic and in elastic–plastic solids, we show that it is also true for indentation in linear viscoelastic solids, provided that the unloading rate is sufficiently fast. When the unloading rate is slow, a “hold” period between loading and unloading can be used to provide a correction term for the initial unloading slope equation. Finite element calculations are used to illustrate the methods of fast unloading and “hold-at-the-maximum-indenter-displacement” for determining the instantaneous modulus using spherical indenters.
Keywords :
Indentation , Instantaneous modulus , Viscoelastic Solids
Journal title :
MATERIALS SCIENCE & ENGINEERING: A
Journal title :
MATERIALS SCIENCE & ENGINEERING: A
Serial Year :
2006
Link To Document :
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