Mechanisms and mechanics governing the indentation of polycrystalline alumina

被引：0

作者：

Wei, Zhensong ^{[1
]}

Deshpande, Vikram S. ^{[2
]}

Evans, Anthony G. ^{[1
,2
]}

机构：

[1] Materials Department, University of California, Santa Barbara, CA 93106, United States

[2] Mechanical Engineering Department, University of California, Santa Barbara, CA 93106, United States

来源：

Journal of the American Ceramic Society | 2008年 / 91卷 / 09期

关键词：

A constitutive model for the inelastic deformation of polycrystalline alumina that accounts for both microcrack growth and plastic slip is implemented into a commercial finite element code. To establish its applicability; the code is used to simulate the deformation that occurs upon spherical and conical indentation. Inelastic zones and indentation pressures are predicted over a range of grain size and compared with measurements. The model replicates the mechanism transition from plasticity control at small grain sizes to micro-crack-control at large grain sizes. It also predicts an extensive micro-crack-dominated inelastic zone at large grain size that reduces the indentation pressures. © 2008 The American Ceramic Society;

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摘要：

Journal article (JA)

引用

页码：2987 / 2996