A micromechanical model for the determination of nonlinear coupled electro-magneto-thermo-elastic effects on magnetoelectric composites

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2025-03-04 DOI:10.1016/j.compstruct.2025.119017

Ziwei Li , Junjie Ye , Lu Liu , Yiwei Wang , Yang Li , Yang Shi , Dianzi Liu

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引用次数: 0

Abstract

Magnetoelectric (ME) composites composed of piezoelectric and magnetostrictive materials have excellent energy conversion properties. In this paper, a novel micromechanical modeling framework is proposed to study the effective material properties and nonlinear electro-magneto-elastic behaviors of magnetoelectric composites under multiple physical fields. Initially, a fully coupled nonlinear electro-magneto-thermo-elastic constitutive relationship is established. Based on finite volume direct averaging micromechanics (FVDAM), the local stress, electric displacement and magnetic flux density distribution of discrete elements are obtained by constructing the generalized local stiffness matrix and assembling the global stiffness matrix. The equivalent material coefficients of the magnetoelectric composite are obtained by employing the homogenization technique. Results of the numerical model are compared with different discrete elements and experimental data to verify the convergence and effectiveness of the developed algorithm. Moreover, effects of external prestress, ambient temperature, microscopic structure and applied magnetic field intensity on material properties such as magnetoelectric and piezomagnetic coefficients are investigated. Finally, the influences of initial damage and constituent phase volume fraction on the equivalent material coefficient and local mechanical response are discussed. The promising results provide a solid foundation for theoretical study and useful insight into the optimal design of high-performance ME composites.

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.