Ductile spallation fracture and the mechanics of void growth and coalescence under shock-loading conditions

被引：53

作者：

Thomason, PF ^{[1
]}

机构：

[1] Univ Calif Los Alamos Natl Lab, Ctr Mat Sci, Los Alamos, NM 87545 USA

来源：

ACTA MATERIALIA | 1999年 / 47卷 / 13期

关键词：

ductile fracture; dynamic phenomena; microstructure; plasticity; shockwaves;

D O I：

10.1016/S1359-6454(99)00223-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A model of ductile spallation fracture is developed from a dynamic void-growth model which takes full account of the effects of material inertia and strain-rate sensitivity on void-growth rates under shock-loading conditions. The void-growth model is used to estimate the dynamic inertial stresses arising at incipient void coalescence and thus allow for these effects in the critical condition for dynamic microvoid coalescence. The theoretical results from the dynamic ductile-fracture model are shown to be in good general agreement with previously published experimental results for ductile spallation fracture in tantalum. (C) 1999 Acta Metallurgica Inc. Published by Elsevier Science Ltd. Atl rights reserved.

引用

页码：3633 / 3646

页数：14

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