Dynamic Behaviors of Polyurea Elastomer: Experimental Characterization, Microscopic Mechanisms and Constitutive Modeling

CHU Dongyang; YAO Kaili; ZHUANG Zhuo; LIU Zhanli

doi:10.21656/1000-0887.450176

Volume 46 Issue 9

Sep. 2025

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CHU Dongyang, YAO Kaili, ZHUANG Zhuo, LIU Zhanli. Dynamic Behaviors of Polyurea Elastomer: Experimental Characterization, Microscopic Mechanisms and Constitutive Modeling[J]. Applied Mathematics and Mechanics, 2025, 46(9): 1083-1107. doi: 10.21656/1000-0887.450176

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Dynamic Behaviors of Polyurea Elastomer: Experimental Characterization, Microscopic Mechanisms and Constitutive Modeling

doi: 10.21656/1000-0887.450176

1. Department of Engineering Mechanics, School of Aerospace Engineering, Tsinghua University,Beijing 100084, P.R.China;
2. China Ship Scientific Research Center, Wuxi, Jiangsu 214082, P.R.China

Funds:

The National Science Foundation of China(11972210)

Received Date: 2024-06-17
Rev Recd Date: 2025-07-25

Available Online: 2025-10-17

Abstract

Abstract

The application of polyurea elastomer to impact protection has broad prospects. However, the physical mechanisms of dynamic deformation and failure of the polyurea under high-pressure impact, delamination, and other conditions are still unclear. Besides, effective constitutive and damage models to describe the dynamic behaviors of polyurea under various strain rates and stress states are still scarce. In response to these challenging issues, the dynamic behaviors of polyurea elastomers under different strain rates, impact pressures, and stress states were systematically studied through experimental characterization, molecular dynamics simulation, and macroscopic mechanical modeling. Full atomic and 2 coarse-grained models for polyurea were established, its microstructure evolution was analyzed, and the microscopic physical mechanisms of deformation and failure of polyurea under high-strain-rate tension, high-pressure impact and high stress triaxiality loading, were revealed. A constitutive model for polyurea elastomers was established in view of the coupling effects of strain rates, temperature and pressure under strong impact. A macroscopic damage model uniformly describing multiple deformation modes was built, including void nucleation criteria and void flow rules. Through verification, the established macroscopic mechanical models can accurately describe the dynamic behaviors of polyurea under impact loading. This work provides a guidance for the optimization design and impact protection application of polyurea elastomers in the future.
- polyurea elastomer,
- dynamic behavior,
- void damage,
- constitutive model,
- molecular dynamics

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References(64)

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