preposition / adverb / noun
beyond
bee-YAHND/bɪˈjɑːnd/
Farther than a specified boundary.
The path continues beyond the gate toward a distant cottage.

Etymology
Be- probably marks position here, while geond points “over there.” Together they expressed being on the farther side, the spatial image behind being farther away than a place, point, or limit.
In context
if I carry on my uniaxial tension test beyond this point Y, then I see that the curve goes up