کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
800416 1467485 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of surface tension on axisymmetric Hertzian contact problem
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Effects of surface tension on axisymmetric Hertzian contact problem
چکیده انگلیسی

Surface tension plays an important role in micro/nanosized contact problems. Based on the solution of a point force acting on a half plane with surface tension, we consider the axisymmetric contact between a rigid sphere and an elastic half space. It is found that when the contact radius is comparable with the ratio of surface tension to elastic modulus, surface tension significantly affects the pressure distribution on the contact region. Compared to the classical Hertzian contact solution, the existence of surface tension decreases the displacements on the half plane and yields continuous slopes of normal stress and displacements across the contact fringe. In addition, the present model predicts the increase of hardness as the radius of indenter decreasing. This study is helpful to characterize and measure the mechanical properties of soft materials or biomaterials through micro-indentation.


► We consider the contact between a rigid sphere and an elastic half space with surface tension.
► Surface tension affects the pressure distribution on the contact region and the contact radius.
► Surface tension yields continuous slope of normal stress across the contact fringe.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mechanics of Materials - Volume 56, January 2013, Pages 65–70
نویسندگان
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