Jaroniek, MieczysławNiezgodziński, Tadeusz2017-09-072017-09-072014Mechanics and Mechanical Engineering Vol. 18, No. 2, 2014, str. 97–1061428-1511http://hdl.handle.net/11652/1707The aim of the study is to include studying the effects of the interaction of lamellar cracks and their effect on the degradation of the structure. Lamellar cracking phenomenon is most common in the construction of welded ship hulls, bridges, pressure vessels and piping. The structures of these, as a result of errors in production and welding cracks. The sudden breakage occurs in the construction of real time, although they have been designed properly in terms of both the volume of the stress and strain. The growth of these cracks, at a rate equal to the speed of sound in the material, it is a sudden breakage.enexperimental testslamellar cracksnumerical methodfinite element methodbadania eksperymentalnepęknięcia powierzchniowemetody numerycznemetoda elementów skończonychArtykuł