FraMCoS 5 2004 Vail, Colorado, USA

Creep Modelling of Ductile Fibre Reinforced Composites

A ductile cement-based composite can be achieved by using short, randomly distributed polymer fibres in a cement-based matrix. This type of composite is known as ECC (Engineered Cement- based Composites). The advantage of this material is that it shows pseudo…

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Year 2004
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Abstract

A ductile cement-based composite can be achieved by using short, randomly distributed polymer fibres in a cement-based matrix. This type of composite is known as ECC (Engineered Cement- based Composites). The advantage of this material is that it shows pseudo strain hardening if loaded in tension. The time-dependant behaviour is still an uncertainty for this type of material. Creep, a time- dependant phenomenon of cement-based composites, could cause a structure to fail at a lower than expected load if the load is sustained for a period of time. This is known as creep fracture. The time scale of creep fracture is of vital importance as it could range from a few minutes to hundreds of years. This paper investigates the phenomenon of creep and creep fracture in a computational framework. This is done at a macro level using a homogeneous material model incorporating non-proportional creep for the behaviour of ECC.