تحليل اجزاء محدود رشد ترك ديناميكي با استفاده از روش مش بندي مجدد در نمونه ي DCB تحت بارگذاري هاي جابه جايي ثابت و نيرو ثابت

FINITE ELEMENT ANALYSIS OF DYNAMIC CRACK GROWTH USING REMESHING TECHNIQUE IN A DCB SPECIMEN UNDER LOADING CONDITIONS OF FIXED-DISPLACEMENT AND FIXED-LOAD

Dynamic crack propagation and arrest phenomena have been considered in this paper. Finite element simula­tion, based on the remeshing technique, has been used to analyze the mode I fracture problem in a DCB spec­imen. A plane stress condition is invoked in the present two dimensional analyses. Specimens have been made from an Araldite-B polymer, which is a brittle material. Both fixed load and fixed displacement, loading condi­tion® have been used to investigate their effects on the fast fracture. A dynamic fracture toughness criterion has been employed to find the crack propagation veloc­ity and crack tip location at each time step. According to the new crack tip position, a remeshing technique has been used, based upon tins new position, and, then, nodal data is transferred from the old mesh to the new mesh, according to the elements shape function. The ANSYS 7.0 standard finite element code and related APDL programming facilities have been employed for modeling the problem. Comparison of the predicted re­sults with those cited in the literature has shown good agreement