کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
279200 1430349 2008 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Size effects on strength, toughness and fatigue crack growth of gradient elastic solids
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Size effects on strength, toughness and fatigue crack growth of gradient elastic solids
چکیده انگلیسی

The present study investigates the microstructural size effect on the strength of a bar under axial loading, and on the toughness and crack growth of a beam under three-point bending within the framework of strain gradient elasticity. The gradient responses have been found considerably tougher as compared to the classical theory predictions and the observed deviation increases with increasing values of the non-dimensional parameter g/L (microstructural length over structural length). Based on the analytical solution of the strain energy release rate for the three-point bending case, a new, simple and universal, strain gradient elasticity, brittle fracture criterion and a new, size adjusted fatigue crack growth law have been established. Finally, the analytical predictions of the current modeling compare well with previous experimental data, based on three-point bending tests on single-edge notched concrete beams.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Solids and Structures - Volume 45, Issues 18–19, September 2008, Pages 4921–4935
نویسندگان
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