کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
767678 897203 2011 24 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A comparative study on five approaches to evaluate double-K fracture toughness parameters of concrete and size effect analysis
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
A comparative study on five approaches to evaluate double-K fracture toughness parameters of concrete and size effect analysis
چکیده انگلیسی

The current paper presents a comprehensive comparison of double-K fracture toughness parameters of concrete evaluated using experimental method and four existing analytical methods. Fracture tests were carried out on compact tension wedge splitting specimens with various depths varying from 200 mm up to 1000 mm. In the analytical calculation, depending on the relationship between critical crack tip opening displacement and the abscissa value of turning point on bilinear softening curve, two different distributions of cohesive stress are considered along crack extension. Results show that four available analytical calculations yield almost the same values of double-K fracture toughness parameters and agree well with those obtained from the experiment, which confirms the consistency of five approaches. Size effect was discussed, including unstable fracture toughness, initiation fracture toughness, critical effective crack length, the length of critical fracture process zone and critical crack tip opening displacement.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Fracture Mechanics - Volume 78, Issue 10, July 2011, Pages 2115–2138
نویسندگان
, ,