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本文根据单品相变时其宏观(长程)切应变(等效应变)与外加切应力(等效应力)问的幂函数关系假定,建立了形状记忆合金多晶体相变塑性的统一细观本构理论,它推广了现有细观本构理论的结果,消除了现有理论中存在的当外加偏应力趋于零时自由能函数的不连续性和宏观塑性变形的不连续性。这一本构理论将能统一地描述在不同温度和载荷下记忆合金所呈现的各种行为。
According to the power function relationship between the macroscopic (long-range) shear strain (equivalent strain) and the applied shear stress (equivalent stress) during the single-component phase transition, a uniform microscopic view of the phase transition plasticity of the shape memory alloy Which extends the existing results of meso-constitutive theory and eliminates the discontinuity of free energy function and the macroscopic plastic deformation discontinuity existing in the existing theory when the applied deviatoric stress approaches zero. This constitutive theory will uniformly describe the various behaviors exhibited by memory alloys at different temperatures and loads.