High-rate deformation and spall fracture of some metals

被引：11

作者：

Bragov, A. M. ^{[1
]}

Balandin, V. V. ^{[1
]}

Konstantinov, A. Yu ^{[1
]}

Lomunov, A. K. ^{[1
]}

Vorobtsov, I. V. ^{[1
]}

Kuznetsov, A., V ^{[2
]}

Savenkov, G. G. ^{[2
]}

机构：

[1] Lobachevsky State Univ, Res Inst Mech, 23-6 Gagarin Ave, Nizhnii Novgorod 603950, Russia

[2] Armalit 1 JSC, 2 Trefolev Str, St Petersburg 198097, Russia

来源：

DYMAT 23RD TECHNICAL MEETING - INTERNATIONAL CONFERENCE ON DYNAMIC FRACTURE OF DUCTILE MATERIALS | 2017年 / 197卷

基金：

俄罗斯科学基金会;

关键词：

Kolsky method; plane-wave test; spall strength; thermofluctuation; aluminum; copper; stainless steel;

D O I：

10.1016/j.proeng.2017.08.103

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

An investigation of high-rate deformation and spall fracture of some metals in a wide range of strain rate was carried out by using the Kolsky method and plane-wave shock experiment. The dynamic stress-strain curves were obtained and speed dependences of the strength characteristics were constructed for commercially pure aluminum and copper, as well as for stainless steel. The strength limits and their dependences on the strain rate and temperature are determined. Based on the obtained mechanical characteristics, the parameters of Johnson-Cook model for stainless steel were determined with due allowance for the influence of the strain rate and temperature on the yield surface radius. It is noted that the time dependence of the spall strength weakly dependent on temperature. A rationale is offered that explains the results within the framework of Zhurkov's kinetic theory of strength. (C) 2017 Published by Elsevier Ltd.

引用

页码：260 / 269

页数：10

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