A visco-hyperelastic constitutive model with Mullins effect for polyurea under repeated impact load

IF 5.1 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Impact Engineering Pub Date : 2025-02-22 DOI:10.1016/j.ijimpeng.2025.105287

Haojie Zhu, Chong Ji, Xin Wang, Yuting Wang, Changxiao Zhao, Yuxuan Gao, Kejie Wang

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引用次数: 0

Abstract

Polyurea exhibits strong strain rate effects and viscoelastic properties in dynamic loading tests. Under repeated cyclic loading, polyurea also exhibits stress softening behavior, known as the Mullins effect. To investigate the stress-strain characteristics and stress softening behavior of polyurea under repeated quasi-static and dynamic loads, specimens suitable for compression and tensile quasi-static and dynamic testing were designed, and the large strain nonlinear mechanical behavior and stress softening characteristics of polyurea were analyzed. The mechanical behavior of polyurea under repeated loading was characterized and optimized based on a visco-hyperelastic constitutive model consisting of a third-order Ogden hyperelastic model, a second-order Prony series, and two Mullins parameters. Importing the stress-strain curve obtained from the constitutive model into numerical simulation analysis can effectively capture the nonlinear and damage behavior of polyurea under blast impact loads.

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来源期刊

International Journal of Impact Engineering 工程技术-工程：机械

CiteScore

8.70

自引率

13.70%

发文量

241

审稿时长

52 days

期刊介绍： The International Journal of Impact Engineering, established in 1983 publishes original research findings related to the response of structures, components and materials subjected to impact, blast and high-rate loading. Areas relevant to the journal encompass the following general topics and those associated with them: -Behaviour and failure of structures and materials under impact and blast loading -Systems for protection and absorption of impact and blast loading -Terminal ballistics -Dynamic behaviour and failure of materials including plasticity and fracture -Stress waves -Structural crashworthiness -High-rate mechanical and forming processes -Impact, blast and high-rate loading/measurement techniques and their applications