کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5016797 | 1465584 | 2017 | 62 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Constitutive modeling of size effect on deformation behaviors of amorphous polymers in micro-scaled deformation
ترجمه فارسی عنوان
مدل سازی مؤثر بر اندازه بر رفتارهای تغییر شکل پلی استر آمورف در تغییر شکل مایکروسافت
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
رفتار سازمانی، مواد انعطاف پذیر ویزاپوپلاستی، مواد پلیمری، اثر اندازه،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
چکیده انگلیسی
With the advantages of high-formability, low-cost and unique physical properties, polymers have been widely used in microforming of polymeric components for a large scale of applications in many fields including micro-optics, microfluidic and sensors, etc. In micro-scale, the deformation behaviors of polymers are observed to be size-dependent. Conventional constitutive models of polymers, however, cannot predict and represent those size-dependent behaviors well. To address this issue, a constitutive model with consideration of size effect for amorphous polymers in micro-scale was developed in this research. Firstly, on the basis of the couple stress theory, the impact of rotational gradients was taken into consideration and a strain gradient “elastic-viscoplastic” constitutive model was proposed to quantitatively describe the size-dependent behaviors of amorphous polymers in micro-scale. After that, four point micro-bending experiments were implemented on poly (methyl methacrylate) (PMMA) films with thickness varying from the millimeter scale to micrometer scale. The size effect of PMMA in micro-scale was further illustrated and the proposed strain gradient “elastic-viscoplastic” model was finally validated and verified for the capability of modeling of the size effect of amorphous polymers in micro-scaled deformation. This research thus advances the understanding of the size effect and the strain gradient based mechanical behaviors of amorphous polymers and facilitates its applications in industries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Plasticity - Volume 89, February 2017, Pages 197-222
Journal: International Journal of Plasticity - Volume 89, February 2017, Pages 197-222
نویسندگان
Y.J. Deng, L.F. Peng, X.M. Lai, M.W. Fu, Z.Q. Lin,