Lüders bands, Lüders lines, stretcher strains, Luders bands, Hartmann lines, Piobert lines, Lüder`s lines, worms
kohaliku ebaühtlase plastse deformatsiooni tõttu metalltooriku (lehtmetall) või proovikeha pinnal moodustuvad jooned/ribad, elongated surface markings or depressions in sheet metal, often visible with the unaided eye, caused by discontinuous (inhomogeneous) yielding