Functionally graded materials with a soft surface for improved indentation resistance: Layout and corresponding design principles

被引：12
|
作者：
Ziegler, Tobias [1 ]
Kraft, Torsten [1 ]
机构：
[1] Fraunhofer Inst Mech Mat, D-79108 Freiburg, Germany
来源：
COMPUTATIONAL MATERIALS SCIENCE | 2014年 / 86卷
关键词：
Smart materials; Mechanical properties; Finite element analysis (FEA); Functionally graded materials (FGM);
D O I：
10.1016/j.commatsci.2014.01.032
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report the finding of an optimal layout of functionally graded materials (FGM) towards indentation resistance. This optimum is characterized by a minimum in tensile surface stresses that can lead to a belated onset of cracking compared to homogeneous materials of uniform stiffness. The parameters influencing the tensile surface stresses in a FGM consisting of a soft surface layer, a stiff base material and a graded region between them have been investigated by finite element analysis and an optimum is reported for the first time. The results in general units can be used to design the gradient in any FGM from plastics to ceramics to result in low tensile surface stresses for a given load. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：88 / 92
页数：5
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