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Tensile Tests at GFRP Rebars
Tensile testing seems to be a standard procedure for most engineering processes. There are standards for tensile testing for most materials including GFRP rebars. So it seems to be strange to see research relevance in such an well known and daily performed test. The authors will focus on the diameter influence and possible effects and influences of conclusions from non-perfect tensile tests.
There are several questions not yet answered sufficiently. As the modulus of the rebars can be calculated from the amount and the modulus of the fibres with high accuracy, the strength can not be calculated in a similar manner. In addition the diameter seems to have an influence even for the same laminate properties and qualities on the strength. The authors shows in a theoretical discussion as well as in practical tests that some common assumptions seem to be reconsidered. It is important to know that commonly accepted residual strength concept is questionable if the tensile strength cannot be determined to a high percentage of the “real” strength.
The discussion on that should encourage young as well as experienced researchers always to question standards and standard procedures, read scientific papers of adjacent disciplines and make their own thoughts and approaches.
Tensile Tests at GFRP Rebars
Tensile testing seems to be a standard procedure for most engineering processes. There are standards for tensile testing for most materials including GFRP rebars. So it seems to be strange to see research relevance in such an well known and daily performed test. The authors will focus on the diameter influence and possible effects and influences of conclusions from non-perfect tensile tests.
There are several questions not yet answered sufficiently. As the modulus of the rebars can be calculated from the amount and the modulus of the fibres with high accuracy, the strength can not be calculated in a similar manner. In addition the diameter seems to have an influence even for the same laminate properties and qualities on the strength. The authors shows in a theoretical discussion as well as in practical tests that some common assumptions seem to be reconsidered. It is important to know that commonly accepted residual strength concept is questionable if the tensile strength cannot be determined to a high percentage of the “real” strength.
The discussion on that should encourage young as well as experienced researchers always to question standards and standard procedures, read scientific papers of adjacent disciplines and make their own thoughts and approaches.
Tensile Tests at GFRP Rebars
Lecture Notes in Civil Engineering
Ilki, Alper (editor) / Ispir, Medine (editor) / Inci, Pinar (editor) / Weber, André (author) / Caspari, Christian (author) / Pahn, Matthias (author)
International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering ; 2021 ; Istanbul, Turkey
10th International Conference on FRP Composites in Civil Engineering ; Chapter: 80 ; 918-927
2021-11-27
10 pages
Article/Chapter (Book)
Electronic Resource
English
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