کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
260490 503663 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fracture process zone size and true fracture energy of concrete using acoustic emission
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Fracture process zone size and true fracture energy of concrete using acoustic emission
چکیده انگلیسی

Acoustic emission (AE) energy, instead of amplitude, associated with each of the event is used to estimate the fracture process zone (FPZ) size. A steep increase in the cumulative AE energy of the events with respect to time is correlated with the formation of FPZ. Based on the AE energy released during these events and the locations of the events, FPZ size is obtained. The size-independent fracture energy is computed using the expressions given in the boundary effect model by least squares method since over-determined system of equations are obtained when data from several specimens are used. Instead of least squares method a different method is suggested in which the transition ligament length, measured from the plot of histograms of AE events plotted over the un-cracked ligament, is used directly to obtain size-independent fracture energy. The fracture energy thus calculated seems to be size-independent.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 24, Issue 4, April 2010, Pages 479–486
نویسندگان
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