پديدآورندگان :
Jamali M. H. M.Sc. 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. Assistant Professor, Department of Mechanical Engineering, Arak University of Technology, Arak 41167-38181, Iran
كليدواژه :
Delamination , Interlaminar Fracture Toughness , Rate of Loading , Fiber Bridging.
چكيده فارسي :
Delamination is one of the most prevalent damages that reduces the stiffness and strength of laminated composites. In this study, the effect of loading rates on the interlaminar fracture toughness of unidirectional laminated composites is investigated. Pure mode I fracture tests carried out on double cantilever beam (DCB) specimens at quasi-static (300 mm/min) and static (1 mm/min) rates of loading. The modified beam theory (MBT) method as a conservative data reduction method has been used to calculate the interlaminar fracture toughness DCB specimens. Experimental results show that by increasing the rate of loading to 300 mm/min the steady-state interlaminar fracture toughness of laminated composites decreases. Moreover, comparison of resistance curve (R-curve) of DCB specimens obtained by two loading rates show that the loading rate affect the bridging zone length significantly.
