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Discussion of Two Crystal Plasticity Models Coupling with Anisotropic Damage for Finite Deformations

機(jī)譯：有限元變形的兩種各向異性各向異性的晶體塑性模型的討論

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Two large deformation crystal plasticity models taking into account of anisotropic damage effect are presented and discussed. The constitutive models are formulated by using the theory of continuum damage mechanics and the internal state variable theory. Both the two models can reflect the plastic anisotropy and damage evolution not only depend on the deformation, but also on the lattice orientation. The paper does in the first place aim at a discussion about the relevance of the physical properties described by the constitutive models. The two models differ in the consideration of the influence of damage on the constitutive behavior of single crystals. The responses of the obtained finite deformation models are then discussed for loading processes with homogenous deformations. Simulation results show that the two models exist differences in disclosing the physical mechanism for single crystals but they predict the same trend of material’s mechanical behaviors. From analysis it reveals the models can not only describe the plastic anisotropy of single crystals but also display anisotropic damage evolution associated with different orientations.
機(jī)譯：提出并討論了兩種考慮各向異性損傷效應(yīng)的大變形晶體塑性模型。本構(gòu)模型是用連續(xù)損傷力學(xué)理論和內(nèi)部狀態(tài)變量理論建立的。兩種模型都可以反映塑性各向異性，損傷演化不僅取決于變形，還取決于晶格取向。本文首先旨在討論本構(gòu)模型描述的物理特性的相關(guān)性。兩種模型在損傷對單晶本構(gòu)行為的影響考慮方面有所不同。然后討論了獲得的有限變形模型對均質(zhì)變形加載過程的響應(yīng)。仿真結(jié)果表明，這兩種模型在揭示單晶的物理機(jī)理方面存在差異，但它們預(yù)測了材料力學(xué)行為的相同趨勢。從分析中可以看出，這些模型不僅可以描述單晶的塑性各向異性，而且可以顯示與不同取向相關(guān)的各向異性損傷演化。

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