Dzyuba P. Experimental studies of influence of holes and cuts of a surface on load-bearing capacity of cylindrical shells under static load.

The object of research is the process of loss of stability, special features and consistent patterns of influence of size, number, shape and location of surface damage on the magnitude of critical load of cylindrical shells. The subject of research are thin cylindrical shells with holes of various shape, size and location, or with different number of randomly distributed on the lateral surface of circular holes or straight through wall cut-cracks, cracks under the influence of static load. The goal is to build relations of critical loads of cylindrical shells by changing the size, number and location of various shaped holes (circular, square and rectangular) and number and size of the through wall cut-cracks or circular holes randomly distributed on their surface while different types of static load. Research methods - system experimental tests of cylindrical shells models in the presence of holes or through wall cut-cracks on the effects of different kinds of static loading (tension, compression, torsion, pure bending and transverse) and an application of the method of spline approximation for the processing and analysis of experimental data results. There are built the relations of the critical loads of cylindrical shells by changing the size, number and location of the various shaped holes of (circular, square, rectangular) and the number and size of the through wall cut-cracks or circular holes randomly distributed on their surface while different types of static load. Introduced into computational practice state enterprise "Construction Bureau "South", Publ. Corp. "Dniprovazhmash" and separate department "Universal" "Shipbuilding Plant. 61 Kommunar". Branch of implementation - aerospace technique, chemical, shipbuilding and building industries.