On notch-strengthening and crack tip deformation in cellular metals

被引：45

作者：

Andrews, EW ^{[1
]}

Gibson, LJ ^{[1
]}

机构：

[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

MATERIALS LETTERS | 2002年 / 57卷 / 03期

关键词：

foams; mechanical properties; fracture; image analysis;

D O I：

10.1016/S0167-577X(02)00824-8

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

Using an image analysis technique, the deformation field in double-edged cracked specimens of an open-cell aluminum foam has been measured. The measured deformation field is consistent with a simple model in which failure occurs by tensile yield of the uncracked ligament and localized shearing (over a distance of about one cell) at the crack tip. An expression for notch strengthening based on this model provides good agreement with experimentally observed notch-strengthening results for both open- and closed-cell foams. (C) 2002 Elsevier Science B.V. All rights reserved.

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页码：532 / 536

页数：5

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