It is difficult to capture the descending branch in the stress- strain diagram of the material in an experimental direct tension protocol (see Figure (a): tension behavior). The flexibility of the loading system causes premature specimen collapse. This is due to the release of stored strain energy in the loading equipement. It has been argued that it is feasible to measure this softening behavior when a sufficiently controlled strain rate is used. Given these facts, the following questions arise:
- Is it possible to measure the softening behavior of plain concrete in an experiment?
- Is there any experimental evidence of this measurement being possible when using a sufficiently controlled strain rate?
I measured the softening of steel-fibre-concrete within a 4-point-bending experiment.
Article Project CC Modelling and quasistatic simulation of the stiff...
- In general, the measurement of tension for concrete may be very difficult by using conventional devices because that need to special sample preparation especially for the regions of catch the specimen by the tensile equipment. but that possible to achieve by preparing special sample.
Please, see the following link:
http://www.framcos.org/FraMCoS-4/403.pdf
Dear Guillermo Elizondo Botello . See the following useful link: https://www.rilem.net/images/publis/119803.pdf
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