کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6748514 1430203 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Porosity and geometry control ductile to brittle deformation in indentation of porous solids
ترجمه فارسی عنوان
قطر و هندسه کنترل تغییر شکل پذیری شکننده در انداختن جامدات متخلخل
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
We report a series of plane strain wedge indentation experiments on a model porous brittle solid (soft rock) and study the effect of porosity and the indenter geometry on the mechanics of indentation. A series of images of the region surrounding the indenter were captured during indentation and were analysed using a particle image velocimetry algorithm. From the image analyses, deformation parameters were analysed as functions of porosity, including velocity fields and localization features such as compaction bands and fractures. The initiation of fracture during indentation was observed in the transition from brittle to ductile behaviour as a function of indentation depth. Higher ductility of the rock during indentation was observed for samples of high porosity and for indentation utilizing sharper wedges. The implications of these results for controlling deformation and fracture in rock drilling by tool geometry and rock porosity control are briefly discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Solids and Structures - Volumes 88–89, 15 June 2016, Pages 11-16
نویسندگان
, , ,