کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
801889 1467697 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modeling the interfacial effect on the yield strength and flow stress of thin metal films on substrates
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Modeling the interfacial effect on the yield strength and flow stress of thin metal films on substrates
چکیده انگلیسی

It is shown in this paper that interfacial effects have a profound impact on the scale-dependent yield strength and strain hardening rates (flow stress) of metallic thin films on elastic substrates. This is achieved by developing a higher-order strain gradient plasticity theory based on the principle of virtual power and the laws of thermodynamics. This theory enforces microscopic boundary conditions at interfaces which relate a microtraction stress to the interfacial energy at the interface. It is shown that the film bulk length scale controls the size effect if a rigid interface is assumed whereas the interfacial length scale dominates if a compliant interface is assumed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mechanics Research Communications - Volume 35, Issues 1–2, January–March 2008, Pages 65–72
نویسندگان
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