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Finite element analysis of glass fibre reinforced composites with inorganic phosphate cement matrix: comparison of inbuilt abaqus concrete models.

Book Contribution - Book Chapter Conference Contribution

Cement composites are promising particularly for the construction industry as they overcome crucial drawbacks of more commonly used polymer matrix composite materials. Contrarily to traditional organic resins (epoxy), the Inorganic Phosphate Cement (IPC), developed at Vrije Universiteit Brussel, is incombustible. The IPC matrix moreover has a neutral pH after hardening, such that it is not chemically aggressive for E-glass fibres, which are cheap in production. Finally, the fine grained IPC can impregnate very dense chopped strand mats, as a result of which fibre volume fractions of more than 20% can be obtained instead of the 5% that is commonly achieved with textile reinforced concrete.
The main objective of this paper is to compare the inbuilt models for concrete offered by the commercial FEM software Abaqus for their adequacy in modelling the cement composite material. The main difficulty with the modelling of the GFR-IPC is the nonlinearity of the tensile behaviour after cracking of the matrix.
Models taken into consideration are Concrete Damaged Plasticity and Concrete Smeared Cracking. Both models have high potential of modelling the cement composite when assuming homogeneity of the material, which is valid due to the high fibre volume fraction(>20%), and the homogenous distribution and random orientation of the fibres using chopped strand mats.
Both numerical models were based on the uniaxial tensile laboratory tests performed on GFR-IPC with a fibre volume fraction of 23%. Models were verified by biaxial tension-tension tests on both a square plate and a cruciform specimen. Comparison of numerical and experimental results yields conclusions on the validity of both concrete models for the modelling of cement composites.
Book: Proceedings 19th International Conference on Composite Materials (ICCM19), Montreal, Canada
Pages: 7544-7533
Number of pages: 10
Publication year:2013
Keywords:FEM, cement composite, glass fibers, biaxial, Concrete Damaged Plasticity, Concrete Smeared Cracking
  • ORCID: /0000-0002-8473-994X/work/70540237