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Micromechanics of Fiber Reinforced Cementitious Composites
The strain hardening and tension softening responses of short fiber‐reinforced cementitious composites under undirectional tension/flexural loading is modelled using concepts from fracture and damage mechanics. The tensile strain hardening in these composites is due to the formation of microcracks which are however prevented from coalescing by the bridging action of the fibers. The density of microcracks increases with the increasing tensile/flexural loading until it reaches a saturation level at the tensile load carrying capacity of the composite. Thereafter the fibers progressively debond from the elastic matrix and the deformation begins to localise in the eventual fracture plane, first as unconnected cracks and later as a connected through crack subjected to the residual frictional bridging action by the fibers.
Micromechanics of Fiber Reinforced Cementitious Composites
The strain hardening and tension softening responses of short fiber‐reinforced cementitious composites under undirectional tension/flexural loading is modelled using concepts from fracture and damage mechanics. The tensile strain hardening in these composites is due to the formation of microcracks which are however prevented from coalescing by the bridging action of the fibers. The density of microcracks increases with the increasing tensile/flexural loading until it reaches a saturation level at the tensile load carrying capacity of the composite. Thereafter the fibers progressively debond from the elastic matrix and the deformation begins to localise in the eventual fracture plane, first as unconnected cracks and later as a connected through crack subjected to the residual frictional bridging action by the fibers.
Micromechanics of Fiber Reinforced Cementitious Composites
Wittmann, F. H. (editor) / Karihaloo, B L (author) / Wang, J (author)
2000-04-20
18 pages
Article/Chapter (Book)
Electronic Resource
English
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