59. Thermomechanical behaviour of a fibre-reinforced refractory concrete: tests and FE analysis

Title: 59. Thermomechanical behaviour of a fibre-reinforced refractory concrete: tests and FE analysis
Author(s): F. Nazaret, T. Cutard, G. Bernhart
Paper category : conference
Book title: 6th International RILEM Symposium on Fibre Reinforced Concretes
Editor(s): M. di Prisco, R. Felicetti and G.A. Plizzari
Print-ISBN: 2-912143-51-9
e-ISBN: 2912143748
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 689 - 698
Total Pages: 10
Nb references: 10
Language: English

Abstract: The reinforcement of refractory castables by short metallic fibres can drastically improve their thermomechanical behaviour. Such reinforced materials become new candidates for specific applications where thermomechanical solicitations are severe. This study focuses on the realisation of moulds for the superplastic forming process (SPF) either for aluminium alloys at temperatures close to 500°C or for titanium alloys at temperatures close to 900°C. Previous works have shown that such materials can be used in such applications, but there is still insufficient knowledge concerning their thermomechanical behaviour to be allow sizing of durable moulds.
In order to attain a better understanding of this behaviour, a research program is in course and is based on experiments and finite element simulations. Direct tensile tests and four points bending tests are performed in the 20-900°C temperature range in order to constitute an experimental database. Numerical simulations with a fictitious crack model implemented in the AbaqusÒ software allows to understand the interest of the fibre reinforcement in concrete. Comparison between experimental data and numerical simulation shows that the influence of the reinforcement on the softening curve is decisive during a structural design and should be taken into account precisely to size SPF moulds.

Online publication: 2004-08-30
Publication type : full_text
Public price (Euros): 0.00