دانلود مقاله ISI انگلیسی شماره 140676
ترجمه فارسی عنوان مقاله

مدل سازنده کریستالی وابسته به اندازه دانه برای مواد پلی کریستالی

عنوان انگلیسی
Grain size-dependent crystal plasticity constitutive model for polycrystal materials
کد مقاله سال انتشار تعداد صفحات مقاله انگلیسی ترجمه فارسی
140676 2017 53 صفحه PDF سفارش دهید
دانلود فوری مقاله + سفارش ترجمه
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
تولید محتوا برای سایت شما
پایگاه ISIArticles آمادگی دارد با همکاری مجموعه «شهر محتوا» با بهره گیری از منابع معتبر علمی، برای کتاب، سایت، وبلاگ، نشریه و سایر رسانه های شما، به زبان فارسی «تولید محتوا» نماید.
  • تولید محتوا با مقالات ISI برای سایت یا وبلاگ شما
  • تولید محتوا با مقالات ISI برای کتاب شما
  • تولید محتوا با مقالات ISI برای نشریه یا رسانه شما
  • و...

پیشنهاد می کنیم کیفیت محتوای سایت خود را با استفاده از منابع علمی، افزایش دهید.

سفارش تولید محتوا کد تخفیف 10 درصدی: isiArticles
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Materials Science and Engineering: A, Volume 703, 4 August 2017, Pages 521-532

ترجمه کلمات کلیدی
مدل سازنده وابسته به اندازه دانه، پلاستیک کریستال، مدل پدیده شناسی مدل مبتنی بر جابجایی، پیکربندی هسته و گوشته
کلمات کلیدی انگلیسی
Grain size-dependent constitutive model; Crystal plasticity; Phenomenological model; Dislocation based model; Core and mantle configuration;
پیش نمایش مقاله
پیش نمایش مقاله مدل سازنده کریستالی وابسته به اندازه دانه برای مواد پلی کریستالی

چکیده انگلیسی

Consideration of a core and mantle configuration for individual grains is a prominent method to capture the grain size-dependence in the constitutive models for polycrystal material. The mantle represents a region of the grain volume near the grain boundary where mechanical deformation is influenced by the grain boundaries, while the core represents the inner region of the grain volume. The grain size-dependence is then realized by assigning a set of values for the mechanical properties in the mantle that are different from those of the core region. However, these values for the mechanical properties of the mantle region are typically chosen arbitrarily, guided solely by the quality of the agreement between a model’s predicted stress-strain behavior with that obtained experimentally. In the present study, a physics-based method to develop the grain size-dependent crystal plasticity constitutive model on the core and mantle configuration for polycrystal materials is presented. The method is based on the assumption that any resistance to dislocation nucleation and motion in a material manifests as an increase in yield strength and a decrease in strain-hardening modulus, and the mutual relationship between yield strength and strain-hardening is an inherent material property that determines the plasticity of that specific material. Accordingly, the same single crystal plasticity constitutive model that describes the behavior of the material under loading can be used to capture the increased resistance to dislocation nucleation and motion in the grain boundary influence region. The physics-based modeling is facilitated by introducing a shear flow strain distribution in the phenomenological formulation and a pile-up of dislocation density distribution in the dislocation based formulation, such that, the resulting variations in the yield strength and the strain-hardening modulus are identical to that produced by the increased resistance in the grain boundary influence region. Thus, the increase in strength and the decrease in the strain-hardening modulus, determined as spatially varying local material properties in the mantle, are mutually related through the grain size-independent inherent plastic properties specific to the material. A simplified model that considers the grain boundary effect averaged over the grain volume is also developed under this general framework. Implementation of this simplified model is demonstrated by considering the case of a power law flow rule and a hyperbolic-secant hardening rule for the phenomenological formulation, and Taylor strength relation for the dislocation based formulation. Finally, the grain size-dependent constitutive model is validated by comparing the predicted stress-strain behavior of polycrystal copper samples under uniaxial loading with experimental results.

دانلود فوری مقاله + سفارش ترجمه
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.