Coalescence-controlled anisotropic ductile fracture

被引：137

作者：

Benzerga, AA ^{[1
]}

Besson, J ^{[1
]}

Pineau, A ^{[1
]}

机构：

[1] Ecole Mines Paris, Ctr Mat, UMR CNRS 7633, F-91003 Evry, France

来源：

JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME | 1999年 / 121卷 / 02期

关键词：

D O I：

10.1115/1.2812369

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The anisotropic ductile fracture of rolled plates containing elongated inclusions is promoted by both the dilational growth of voids and the coalescence process. In the present article, the emphasis is laid on the latter process. The effects of void shape and mainly of inter-particle spacings are investigated. Two types of coalescence models ale compared: a localization-based model and plastic limit-lend models. The capabilities of both approaches to incorporate shape change and spacing effects are discussed. These models are used to predict the fracture properties of two low alloy steels containing mainly manganese sulfide inclusions. Both materials are characterized in different loading directions. Microstructure data inferred from quantitative metallography are used to derive theoretical values of critical void volume fractions at incipient coalescence. These values are used in FE-calculations of axisymmetrically notched specimens with different notch radii and lending directions.

引用

页码：221 / 229

页数：9

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