چکیده مقاله
A bonded particle model is used to study the fracture process zone in mode I fracture of quasi brittle materials The simulated materials are tested in three point bending tests A notch is cut through the sample mid span to encourage the development of the damaged zone Five different beam sizes of 20×60, 40×120, 80×240, 160×240, and 320×960 mm2 were tested The ductility of the material was controlled by changing the slope of the load displacement curve in the post peak behavior of the contact points between the material grains or particles To change the porosity, some particles were deleted from the domain of analysis It is shown that both porosity and ductility affect the size of the process zone in mode I fracture While for more brittle materials, the increase in porosity leads to a greater fracture process zone, this is not the case for more ductile materials In this latter case, the process zone can shrink in size with the increase in porosity
کلیدواژهها
نویسندگان
Ali Fakhimi
Corresponding Author, Professor, Department of Mineral Engineering, New Mexico Tech, Socorro, NM ۸۷۸۰۱, USA
Mehdi Galouei
Graduate student, Department of Mineral Engineering, New Mexico Tech, Socorro, NM ۸۷۸۰۱, USA
شیوه ارجاع
Fakhimi, Ali and Galouei, Mehdi,1394,Influence of Porosity and Material Ductility on Fracture Process Zone: A Numerical Study,10th International Congress on Civil Engineering,Tabriz
ارائهشده در
مجموعه مقالات دهمین کنگره بین المللی مهندسی عمران15 اردیبهشت 1394 · تبریز