Micromechanics of elasto-plastic fibre pull out of elastic matrix
2013
Galushchak, A., Riga Technical Univ. (Latvia). Inst. of Mechanics. Lab. of Concrete Mechanics | Kononova, O., Riga Technical Univ. (Latvia). Inst. of Mechanics. Lab. of Concrete Mechanics
It has been proven by many researchers that the overall behaviour of concrete can be improved by the addition of fibres. In the present investigation numerical (FEM) modelling of elastically plastic single straight fibre pull out of elastic matrix volume was realized. Comparison was done with steel fibre is pulling out of concrete matrix. Fibre pulling out micromechanics is governing the macro-crack opening process – fibre concrete post cracking load bearing capacity is dependent on each single fibre pull out force. Numerical modelling was performed using 3D approach, which takes into account the non-linearity is presenting in physical model in combination with a finite element method (FEM). Straight shape fibre pulling out of concrete block in fibre direction was investigated earlier (Li et al., 1998; Mobasher et at., 1995). In our investigation numerical modelling was performed for straight shape fibre was embedded into elastic matrix under variable angle to applied pulling force and at variable depth.
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