کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7216320 1469947 2018 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Crack in an elastic thin-film with surface effect
ترجمه فارسی عنوان
در یک فیلم نازک الاستیک با اثر سطحی سرخ کنید
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
چکیده انگلیسی
A two-dimensional fracture problem on a crack embedded in an elastic thin-film with surface effect is studied. An elastic analysis of an infinite isotropic homogeneous elastic thin-film with a crack penetrating its thickness is made when subjected in-plane applied loading. Since the elastic thin-film in question is sufficiently thin, the surface stress and surface elasticity are taken into account. First, the principle of virtual work is applied to derive basic equations. Furthermore, coupled governing equations on elastic displacements are obtained, which are then transformed to a single bi-harmonic equation. Mode-I and mode-II cracks are solved and two singular integral equations with Cauchy kernel of the first kind are derived by the Fourier transform technique. Exact elastic field in the whole elastic plane is determined for each case. Fundamental fracture parameters such as the stress intensity factor (SIF) are obtained. Results show that both surface stress and surface elasticity can decrease the SIF, and the SIF is related to material properties. When neglecting surface effects, the SIF is independent of the material properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Engineering Science - Volume 123, February 2018, Pages 158-173
نویسندگان
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