Plastic deformation and failure of solids with stress state dependent properties

Evgeny Lomakin, Boris Fedulov

    Research output: Contribution to journalConference articlepeer-review

    Abstract

    The plastic and strength properties of many structural materials depend on the type of external forces; in particular, they have different stress-strain curves under the conditions of uniaxial tension, uniaxial compression, different types of biaxial and triaxial loadings. This effect is concerned some structural features of polycrystalline alloys. Based on the analysis of experimental data, a possible approach to describe the dependence of plastic characteristics of materials on the stress state type realized under loading is proposed. The plasticity condition for the materials of stress state dependent properties is represented in corresponding generalized form, which includes some of well-known plasticity conditions in different particular cases. The constitutive equations to describe simultaneously the anisotropy and stress state dependence of plastic material properties are formulated. The results of experimental studies of plastic properties of aluminum alloy are analyzed with the use of proposed model.

    Original languageEnglish
    Pages (from-to)549-555
    Number of pages7
    JournalProcedia Structural Integrity
    Volume18
    DOIs
    Publication statusPublished - 2019
    Event25th International Conference on Fracture and Structural Integrity, IGF 2019 - Catania, Italy
    Duration: 12 Jun 201914 Jun 2019

    Keywords

    • Aluminum alloy
    • Anisotropy
    • Plasticity
    • Pressure treatment
    • Stress state dependency
    • Triaxiality

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