A Thermo-Elasto-Plastic Constitutive Model Based on Eulerian Strain Framework for Wide-Strain-Rate Response of Polycrystals: Part Ⅱ Application for Shock and Quasi-Isentropic Loading

Shuqing Yang

doi:10.1016/j.ijplas.2026.104776

A Thermo-Elasto-Plastic Constitutive Model Based on Eulerian Strain Framework for Wide-Strain-Rate Response of Polycrystals: Part Ⅱ Application for Shock and Quasi-Isentropic Loading

2026-07-27

0

PRE

AI

S

Shuqing Yang

G

Guisen Liu *

R

Ran Chen

J

Jianbo Hu

Y

Yuying Yu

W

Wenjun Zhu

Y

Yuanchao Gan

Y

Yao Shen *

DOI：10.1016/j.ijplas.2026.104776

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• For the first time, the long-standing discrepancy between dynamic yield strengths measured by direct and self-consistent wave-profile analysis methods is resolved. • Systematically reveals the physical origins underlying the yield strength differences between shock and quasi-isentropic loading paths. • The distinct evolution of primary yield stress under shock vs. quasi-isentropic loading is revealed to be governed mainly by homogeneous dislocation nucleation. • For the first time, the complex zigzag evolution of secondary yield strength under shock loading is identified, and explained with the concept of critical dislocation density. • A unique “primary softening, secondary hardening” effect of GNDs under dynamic loading is revealed.

A Thermo-Elasto-Plastic Constitutive Model Based on Eulerian Strain Framework for Wide-Strain-Rate Response of Polycrystals: Part Ⅱ Application for Shock and Quasi-Isentropic Loading

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