Advances in Mechanics: Theoretical, Computational and Interdisciplinary Issues  covers the domain of theoretical, experimental and computational mechanics as well as interdisciplinary issues, such as industrial applications. Special attention is paid to the theoretical background and practical applications of computational mechanics. This volume contains 132 contributions presented at the PCM-CMM-2015 Congress held on 8-11 September, 2015 in GdaÅsk, Poland. The Congress is a joint scientific event of the 3rd Polish Congress of Mechanics (PCM) and the 21st International Conference on Computer Methods in Mechanics (CMM). Advances in Mechanics: Theoretical, Computational and Interdisciplinary Issues  will be of interest to researchers and designers dealing with mechanics and its applications.