TY - JOUR

T1 - A unified experimental-theoretical approach to predict the critical stress characteristics of failure and yielding under quasi-static and dynamic loading

AU - Smirnov, I. V.

AU - Lamzin, D. A.

AU - Konstantinov, A. Yu

AU - Bragov, A. M.

AU - Lomunov, A. K.

N1 - Funding Information: The research on brittle materials was carried out with the support of a grant from the Government of the Russian Federation (contract No. 14.Y26.31.0031). The strain-rate dependence of yield strength of ultrafine-grained titanium and copper was studied with the support of the Grant of the President of the Russian Federation for young scientists ( MK-2587.2017.1 ). Publisher Copyright: © 2018 Elsevier Ltd

PY - 2020/2/15

Y1 - 2020/2/15

N2 - The results of experimental and theoretical studies on the dynamic response of brittle and ductile materials are presented. The work shows the possibility of predicting the critical stress of brittle materials or yield strength of ductile materials over a wide range of strain rates on the basis of a combination of a simple theoretical approach to dynamic strength and a set of experimental data obtained using a conventional technique. The studies were carried out using fine-grained concrete and ceramic brick as representatives of brittle materials, and copper and titanium as representatives of ductile materials. The traditional Kolsky method was used to determine the strength and ductility characteristics under dynamic loading conditions of the experimental samples. The sensitivity of the critical stress characteristics of failure and yielding of the studied materials to the strain rate is shown. The incubation time approach is used to interpret the effects of strain rate. The applicability of the incubation time criterion to prediction of the dynamic behaviour of both brittle and ductile materials is shown. The presented unified experimental-theoretical approach can be applied in engineering practice to model the dynamic response of structural materials.

AB - The results of experimental and theoretical studies on the dynamic response of brittle and ductile materials are presented. The work shows the possibility of predicting the critical stress of brittle materials or yield strength of ductile materials over a wide range of strain rates on the basis of a combination of a simple theoretical approach to dynamic strength and a set of experimental data obtained using a conventional technique. The studies were carried out using fine-grained concrete and ceramic brick as representatives of brittle materials, and copper and titanium as representatives of ductile materials. The traditional Kolsky method was used to determine the strength and ductility characteristics under dynamic loading conditions of the experimental samples. The sensitivity of the critical stress characteristics of failure and yielding of the studied materials to the strain rate is shown. The incubation time approach is used to interpret the effects of strain rate. The applicability of the incubation time criterion to prediction of the dynamic behaviour of both brittle and ductile materials is shown. The presented unified experimental-theoretical approach can be applied in engineering practice to model the dynamic response of structural materials.

KW - Brittle materials

KW - Ductile materials

KW - Dynamic tests

KW - Dynamic ultimate strength

KW - Dynamic yield strength

KW - Incubation time criterion

KW - Split-Hopkinson pressure bar

KW - Strain rate dependence

UR - http://www.scopus.com/inward/record.url?scp=85055637885&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/unified-experimentaltheoretical-approach-predict-critical-stress-characteristics-failure-yielding-un

U2 - 10.1016/j.engfracmech.2018.10.023

DO - 10.1016/j.engfracmech.2018.10.023

M3 - статья

AN - SCOPUS:85055637885

VL - 225

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

SN - 0013-7944

M1 - 106197

ER -