کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7170646 | 1463291 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Post-buckling analysis of microscale non-prismatic beams subjected to bilateral walls
ترجمه فارسی عنوان
تجزیه و تحلیل پس از خمش از پرتوهای غیر محرک میکروسکوپ تحت دیوارهای دو طرفه
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کلمات کلیدی
غیرشخصی محدودیت های دو جانبه، میکروب ها، تجزیه و تحلیل پس از خم شدن وابسته به اندازه، تئوری تنش زنانه اصلاح شده،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
چکیده انگلیسی
Microdevices, consisting of axially loaded elements at the microscale, are typically designed as bilaterally constrained microbeams with non-prismatic shape configurations. The literature has been mainly focused on uniform microbeams. Here we report a novel class of non-prismatic, microscale beams confined by bilateral walls. A size-dependent theoretical model is developed to investigate the post-buckling response of the microbeams using the modified couple stress theory and Euler-Bernoulli beam theory. The size effect is considered by the material length scale factor l, the shape asymmetry is taken into account using the non-prismatic bending stiffness Bmx, and the bilateral constraints are solved using an energy method that minimizes the total energy of the deflected microbeams. Experiments and numerical simulations are carried out to validate the theoretical model at the macro- and microscale, respectively. Parametric studies are conducted to investigate the effects of the material factor l and shape configuration on the post-buckling behavior of the non-uniform microbeams. The highest achievable buckling mode is examined with respect to the ratios of beam length-to-constraints gap η=Lh and thickness-to-material length factor γ=tl. The model presented in this study can be used to tune the post-buckling response of the bilaterally constrained microbeams with non-prismatic shape configurations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Extreme Mechanics Letters - Volume 21, May 2018, Pages 82-89
Journal: Extreme Mechanics Letters - Volume 21, May 2018, Pages 82-89
نویسندگان
Wassim Borchani, Pengcheng Jiao, Ilhem Borcheni, Nizar Lajnef,