TY - JOUR

T1 - Effect of Impact Time Parameters on the Dynamic Strength in Spall Fracture

AU - Mikhailova, N. V.

AU - Petrov, Yu V.

N1 - Mikhailova, N.V., Petrov, Y.V. Effect of Impact Time Parameters on the Dynamic Strength in Spall Fracture. Phys Mesomech 24, 9–13 (2021). https://doi.org/10.1134/S1029959921010021

PY - 2021/1/1

Y1 - 2021/1/1

N2 - Abstract: Recent experimental studies on spallfracture show that the impact parameters can lead toinstabilities in the strain rate dependence of the dynamicstrength of the material. Here we consider the effect of thedynamic impact parameters on the time dependences of thematerial ultimate stress. Numerical modeling of spall fractureis conducted for ultrapure aluminum. The stress-time relationsare obtained from a one-dimensional wave problem using anelastic formulation. The fracture conditions are determined bythe incubation time criterion for spall fracture. The obtainedresults show that the dynamic strength can depend not only onthe strain rate, but also on other impact time parameters. Thestructural-temporal approach used in fracture modeling allowstaking into account the loading history, which makes it aconvenient tool for considering the corresponding effects. Thedynamic strength is calculated with varying impact timeparameters. The strain rate dependences of the ultimate stressesobtained for different types of impact are found to bedifferent, which is also consistent with experimental data.

AB - Abstract: Recent experimental studies on spallfracture show that the impact parameters can lead toinstabilities in the strain rate dependence of the dynamicstrength of the material. Here we consider the effect of thedynamic impact parameters on the time dependences of thematerial ultimate stress. Numerical modeling of spall fractureis conducted for ultrapure aluminum. The stress-time relationsare obtained from a one-dimensional wave problem using anelastic formulation. The fracture conditions are determined bythe incubation time criterion for spall fracture. The obtainedresults show that the dynamic strength can depend not only onthe strain rate, but also on other impact time parameters. Thestructural-temporal approach used in fracture modeling allowstaking into account the loading history, which makes it aconvenient tool for considering the corresponding effects. Thedynamic strength is calculated with varying impact timeparameters. The strain rate dependences of the ultimate stressesobtained for different types of impact are found to bedifferent, which is also consistent with experimental data.

KW - Incubation time

KW - Instability of dynamic strength

KW - Spall fracture

KW - Structural-temporal approach

KW - STRAIN-RATE

KW - ALUMINUM

KW - BEHAVIOR

KW - STRESS

KW - FAILURE

UR - http://www.scopus.com/inward/record.url?scp=85104825908&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/59d2a54a-13f6-3341-91e5-0e62f7ef1daf/

U2 - 10.1134/s1029959921010021

DO - 10.1134/s1029959921010021

M3 - Article

AN - SCOPUS:85104825908

VL - 24

SP - 9

EP - 13

JO - Physical Mesomechanics

JF - Physical Mesomechanics

SN - 1029-9599

IS - 1

ER -