پديدآورندگان :
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 , Daneshjoo Z PhD 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 , Fakoor M Assistant professor, Faculty of New Sciences and Technologies, University of Tehran, Tehran, 1439957131, Iran
كليدواژه :
Delamination , Laminated composites , Fiber bridging , Fracture process zone , Mixed mode I , II.
چكيده فارسي :
In unidirectional composites, delamination cracks parallel to the reinforcement axis are commonly bridged by
fibers. The fiber bridging as a toughening mechanism has an important effect on the behavior of the fracture process
zone. Many researchers have qualitatively investigated the fiber bridging effects on the delamination failure
phenomenon of unidirectional composites under mixed mode I/II loading. However, due to the complexity, these effects
are rarely studied quantitatively. In the present research, an analytical solution is presented which accounts for
breakdown of the micro-mechanisms responsible for the load transfer across the bridged delamination cracks. Firstly,
different failure micro-mechanisms involved during the fiber bridging phenomenon were identified. Then, suitable
boundary and different loading conditions on the bridged fiber were applied. Then, the absorbed energy of each of
these failure micro-mechanisms was calculated. Finally, the energy absorbed by the fiber bridging zone was obtained
from a summation of these energy terms. The present work deals with arbitrary values of the mode mixities.
