materjali tugevusnäitaja: piirpinge, milleni kehtib proportsionaalne seos pinge ja deformatsiooni vahel ning plastset deformatsiooni ei toimu (vrd elastsuspiir)
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Proportsionaalsuspiir on pinge mille juures tõmbediagrammil algab kõrvalekalle lineaarsest sõltuvusest pinge ja deformatsiooni vahel. (vt tõmbediagramm)
the maximum stress at which strain remains proportional to stress and there is no plastic deformation (compare: elastic limit)
Good to know
The proportional limit is the stress at which the stress-strain curve deviates from linearity. (see: stress-strain curve)
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