Material characterisation and constitutive modelling of a tungsten-sintered alloy for a wide range of strain rates

被引：85

作者：

Rohr, I. ^{[1
]}

Nahme, H. ^{[1
]}

Thoma, K. ^{[1
]}

Anderson, C. E., Jr. ^{[2
]}

机构：

[1] Ernst Mach Inst, Fraunhofer Inst Kurzzeitdynam, D-79104 Freiburg, Germany

[2] SW Res Inst, San Antonio, TX 78238 USA

来源：

INTERNATIONAL JOURNAL OF IMPACT ENGINEERING | 2008年 / 35卷 / 08期

关键词：

tungsten; Taylor-impact test; planar-plate-impact test; strain rates; Johnson-Cook;

D O I：

10.1016/j.ijimpeng.2007.12.006

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The behaviour of a tungsten-sintered alloy has been investigated using a combination of tension tests, modified Taylor-impact tests and planar-plate-impact (PPI) tests using the VISAR technique. A logarithmic yield stress-strain rate dependency as it is predicted by the original Johnson-Cook (JC) strength model covering a strain rate range of 10 orders of magnitude has been measured. With the PPI tests the Hugoniot elastic limit and the spall strength, as well as the U-s-u(p). relation have been determined. Model parameters for the JC strength model and an equation of state have been determined from the experimental results. The validation of the material model has been performed by numerical simulations of the modified Taylor-impact tests where an enhanced model validation has been done by comparing the measured and calculated VISAR signals while this technique is normally used for PPI tests only. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：811 / 819

页数：9

共 33 条

[1]

[Anonymous], 1994, Dynamic Behavior of Materials, P66

[2]

ARNOLD W, 1991, THESIS TU MUNICH

[3] LASER INTERFEROMETER FOR MEASURING HIGH VELOCITIES OF ANY REFLECTING SURFACE [J].

BARKER, LM ;

HOLLENBACH, RE .

JOURNAL OF APPLIED PHYSICS, 1972, 43 (11) :4669-+

[4]

Behner T., 2002, P 20 INT S BALL LANC, V2, P834

[5] Ballistic penetration of steel plates [J].

Borvik, T ;

Langseth, M ;

Hopperstad, OS ;

Malo, KA .

INTERNATIONAL JOURNAL OF IMPACT ENGINEERING, 1999, 22 (9-10) :855-885

[6]

Bridgman P. W., 1964, STUDIES LARGE PLASTI

[7]

*CENT DYN LTD, 2002, AUT THEOR MAN

[8] On the influence of constitutive relation in projectile impact of steel plates [J].

Dey, S. ;

Borvik, T. ;

Hopperstad, O. S. ;

Langseth, M. .

INTERNATIONAL JOURNAL OF IMPACT ENGINEERING, 2007, 34 (03) :464-486

[9] MECHANICAL-PROPERTIES AT HIGH-STRAIN RATES [J].

ELMAGD, E .

JOURNAL DE PHYSIQUE IV, 1994, 4 (C8) :149-170

[10] DETERMINATION OF CONSTANTS AND COMPARISON OF RESULTS FOR VARIOUS CONSTITUTIVE MODELS [J].

HOLMQUIST, TJ ;

JOHNSON, GR .

JOURNAL DE PHYSIQUE III, 1991, 1 (C3) :853-860

← 1 2 3 4 →