شماره ركورد كنفرانس :
4562
عنوان مقاله :
Methods of Pre-Cracking and Investigation of Effects on Fracture Toughness of Poly(methyl methacrylate)
Author/Authors :
E Haddadi Department of Mechanical Engineering - Sahand University of Technology, Tabriz , N Choupani Department of Mechanical Engineering - Sahand University of Technology, Tabriz , F Abbasi Institute of Polymeric Materials - Sahand University of Technology, Tabriz
كليدواژه :
Pre-cracking methods , PMMA , Fracture toughness , Critical stress intensity factor
عنوان كنفرانس :
The Bi-Annual International Conference on Experimental Solid Mechanics and Dynamics ۲۰۱۶
چكيده لاتين :
In the present research, pre-cracking methods and effects of pre-cracking on the fracture toughness of poly(methyl methacrylate) have been investigated. Pre-cracking methods including razor-sawing, razor-gently pressing, razor-tapping, and razor-slotting were used to produce pre-cracked for studying of fracture toughness (Kc) test specimens made of poly(methyl methacrylate). The obtained fracture toughness Kc values showed that in addition to the geometry of crack tip, the Kc strongly depended on crack tip sharpness. Moreover, the damage in front of crack and residual stress could be effective on the fracture toughness of samples. The maximum difference resulted from different pre-cracking methods was equal to 0.16 MPa.m0.5 and the lowest value of fracture toughness Kc, 2.49 MPa.m0.5, belonged to the razor-slotting method but the highest value, 2.65 MPa.m0.5, belonged to the razor-sawing method.
