TY - JOUR

T1 - Modeling the time effects of irreversible deformation based on the relaxation plasticity model

AU - Selyutina, N. S.

AU - Petrov, Yu. V.

N1 - Selyutina, N.S., Petrov, Y.V. Modeling the Time Effects of Irreversible Deformation Based on the Relaxation Plasticity Model. Phys. Solid State 61, 935–940 (2019). https://doi.org/10.1134/S1063783419060222

PY - 2019

Y1 - 2019

N2 - Abstract: Plastic deformation of metals and polymethylmethacrylate under the action of dynamic load is analyzed based on the relaxation model of plastic deformation. The parameters of the relaxation model of plasticity are invariant with respect to the deformation history which allows, within a unified approach, obtaining any set of deformation curves, both monotonic, with varying yield limit, and nonmonotonic, with appearing and varying yield drop, as it is observed in experiment. Increase in the yield limit and hardening effect at high-rate and static deformation of high-strength 2.3Ni–1.3Cr steel is also simulated based on the relaxation model. Exemplified by DP600 steel and nanocrystal nickel, it is shown that the relaxation model of plasticity allows predicting the smooth transition to the plastic deformation stage at slow quasi-static loading ~10 –3 s –1 and appearance of the yield drop at strain rate of 500–6000 s –1. In addition, it is demonstrated that the developed approach allows modeling the similar effects also for the high-rate deformation of the polymethylmethacrylate. Thus, it is demonstrated on the example of specific materials that we may use the deformation history-invariant parameters of the relaxation model of plasticity for efficient prediction of the deformation dependences of the studied materials in a wide range of strain rates 10 –4–10 4 s –1.

AB - Abstract: Plastic deformation of metals and polymethylmethacrylate under the action of dynamic load is analyzed based on the relaxation model of plastic deformation. The parameters of the relaxation model of plasticity are invariant with respect to the deformation history which allows, within a unified approach, obtaining any set of deformation curves, both monotonic, with varying yield limit, and nonmonotonic, with appearing and varying yield drop, as it is observed in experiment. Increase in the yield limit and hardening effect at high-rate and static deformation of high-strength 2.3Ni–1.3Cr steel is also simulated based on the relaxation model. Exemplified by DP600 steel and nanocrystal nickel, it is shown that the relaxation model of plasticity allows predicting the smooth transition to the plastic deformation stage at slow quasi-static loading ~10 –3 s –1 and appearance of the yield drop at strain rate of 500–6000 s –1. In addition, it is demonstrated that the developed approach allows modeling the similar effects also for the high-rate deformation of the polymethylmethacrylate. Thus, it is demonstrated on the example of specific materials that we may use the deformation history-invariant parameters of the relaxation model of plasticity for efficient prediction of the deformation dependences of the studied materials in a wide range of strain rates 10 –4–10 4 s –1.

UR - http://www.scopus.com/inward/record.url?scp=85067433683&partnerID=8YFLogxK

U2 - 10.1134/S1063783419060222

DO - 10.1134/S1063783419060222

M3 - Article

VL - 61

SP - 935

EP - 940

JO - Physics of the Solid State

JF - Physics of the Solid State

SN - 1063-7834

IS - 6

ER -