DEFORMATION AND FRACTURE OF THE FUNCTIONALLY FERROMAGNETIC MATERIALS

This paper reviews the research on deformation and fracture of the functionally ferromagnetic ma- terials in the past several decades,especially in the recent decade or so.Problems of classical magnetoelasticity have been studied for a long time and a large number of results have been published.Along with the development of smart materials and structures in recent years,the functionally ferromagnetic materials,such as the giant magnetostrictive materials of rare earth,ferromagnetic shape memory alloys and the ferromagnetic composites, have attracted great attention.A lot of studies concern the deformation and fracture of the functionally ferro- magnetic materials and the effective properties of ferromagnetic composites.In this paper,a brief introduction is firstly given to the research background of the classical magnetoelasticity and the mechanical and magnetic behavior of the traditional ferromagnetic structures.The research achievements on deformation and fracture behavior of the soft ferromagnetic materials and the mechanics of the ferromagnetic composites are presented and commented extensively.Also discussed are the authors' studies in recent years both on the experimental techniques of the functionally ferromagnetic materials,and the theoretical work on the mesomechanics of the ferromagnetic composites,the magnetomechanical deformation and fracture mechanics of the soft ferromagnetic materials and smart ferromagnetic shape memory materials.Finally,some topics for further studies are pointed out.