habraste (mitteplastsete) materjali tugevuspiir paindel; pinge, mis vastab purunemisele eelnenud suurimale koormusele paindel (vt paindekatse), nominal stress at fracture in a bend test; in bending, modulus of rupture is the bending moment at fracture divided by the section modulus (modulus of rupture in bending) (see: bend test)