Topic: FRP rupture
I am doing a research on simulating the behavior concrete member reinforced with FRP.
I behavior of FRP material was defined by multilinear curve consisted of three points: (0,0), (Strain at rupture, stress at rupture), (Strain at rupture + 0.0001, 0).
After running the model, I found that some strain readings in FRP exceeded the strain at rupture, while the stress value did not exceed rupture stress.
I expected that the reinforcement bars will rupture when the rupture strain is reached, according, strain readings should not exceed rupture strain. However, this is not happening.
I am missing something or doing something wrong?