On the invariance of hardness at sharp indention of materials with general biaxial residual stress fields

被引:7
作者
Larsson, Per-Lennart [1 ]
Blanchard, Pierre [1 ]
机构
[1] Royal Inst Technol, Dept Solid Mech, SE-10044 Stockholm, Sweden
关键词
Residual stress; General stress fields; Sharp indentation; Hardness; Mises plasticity; 3-DIMENSIONAL FINITE-ELEMENT; STRAIN FIELDS; CONTINUOUS INDENTATION; PYRAMID INDENTATION; SCRATCH TEST; METALS; NANOINDENTATION; DELAMINATION; CONTACT; POLYMERS;
D O I
10.1016/j.matdes.2013.05.098
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In recent years, the influence from residual surface stresses on the global indentation properties, i.e. hardness and size of the contact area, have been studied quite frequently. The investigations presented have been based on experimental, theoretical and numerical methods and for one thing, the invariance of hardness in the case of residual equi-biaxial surface stresses, has been well-established. In the more general case, when the principal surface stresses are not necessarily equi-biaxial, corresponding results are more scattered and it is therefore the aim of the present study to remedy this shortcoming. In doing so, the problem is presently attacked using numerical methods and in particular the finite element method (FEM) is relied upon. Classical Mises elastoplastic material behavior is assumed throughout the investigation which is restricted, for clarity but not for necessity, to sharp cone indentation. The results confirm the invariance of hardness also for general stress fields when the deformation in the contact region is dominated by plastic deformation. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:602 / 608
页数:7
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