پديدآورندگان :
Kharratzadeh M. MSc Student, Composites Research Laboratory,Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, 16846-13114, Iran , Shokrieh M.M. Shokrieh@iust.ac.ir Professor, Composites Research Laboratory,Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, 16846-13114, Iran; , Salamat-Talab M. Assistatnt Professor, Department of Mechanical Engineering, Arak University of Technology, Arak, 41167-38181, Iran
كليدواژه :
Interface fiber angle , plain woven composites , delamination initiation and propagation , fracture toughness , double cantilever beam
چكيده فارسي :
In this study the effect of delamination interface fiber angle orientation on the initiation and propagation fracture toughness of plain woven composites with stacking sequences of [012//012] and [011/0//45/011] under mode I loading were investigated. This stacking sequences are chosen in order to eliminate the effect of remote ply orientation on the delamination behavior of the double cantilever beam (DCB) specimens. Samples were manufactured by the wet hand lay-up method and fracture tests were conducted on specimens using the universal testing machine (SANTAM STM-150) according to ASTM standard. The experimental results showed that the interface ply orientation had a negligible effect on the magnitudes of initiation and propagation fracture toughness of plain woven composites due to delamination propagation in the resin rich area of delamination interface. In addition, the experimental evidence revealed that the fiber bridging was not a main mechanism of increasing fracture toughness during delamination propagation unlike the unidirectional DCB specimens
