Obtaining Creep Damage of Aluminum Alloy 2A12 by Using Indentation Method with Different Indenters

Author: Zhao, Bin

Source: Multidiscipline Modeling in Materials and Structures, Volume 5, Number 4, 2009 , pp. 389-394(6)

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Abstract:

Indentation tests performed in creep damage materials show that slopes of initial portions of unloading curves which are often used to calculate indented modulus can characterize creep damage. To evaluate the influence of different indenters in determining creep damage, conical, spherical and cylindrical indenters which are all self-similar in shape were considered by using the Finite Element Method (FEM). Indentation load (P)-displacement (h) curves and equivalent elastic modulus (E'')-creep damage (ω) curves were given. Results show that the cylindrical indenter is appropriate for “soft” materials, the conical indenter is suitable for small creep damage materials, and the spherical indenter can be used in many other materials.

Keywords: INDENTATION; THE FINITE ELEMENT METHOD (FEM); CREEP DAMAGE; DIFFERENT INDENTERS

Document Type: Research article

DOI: http://dx.doi.org/10.1163/157361109789807963

Affiliations: 1: Department of Engineering Mechanics, Northwestern Polytechnical University, Xi'an, 710072 P.R. China;, Email: zhaobin@nwpu.edu.cn

Publication date: 2009-10-01