Анализ конструкционной прочности составных тонкостенных конструкций с болтовым соединением элементов

Abstract

Thesis for the degree of Candidate of technical Sciences in specialty 05.02.09 – dynamics and strength of machines. National technical University "Kharkiv Polytechnic Institute", Ministry of Education and Science of Ukraine, Kharkiv, 2016. The thesis is devoted to the development of approaches, methods and models to study structural strength of composite thin-walled engineering structures with bolted elements. This work is solves the problem of analysis of the stress-strain state of composite thin-walled engineering structures with bolted elements, as well as its implementation and determination of the distribution of deflections, displacements and longitudinal efforts. Also in this formulation the following important factors were taken into account: the gap in bolted joints, friction force between the contacting surfaces, the pre-tightening of bolted connections, the presence of polymeric materials, as well as consideration of the corrugated shape of panels used. On the basis of mathematical models of the stress-strain state of the shell, the rod and plate structures, a mathematical model that takes into consideration the influence of axial forces and geometric nonlinearity in general on stress-strain state of composed thin-walled structures was elaborated in this thesis. The results of solving some applied problems were obtained. The regularities of changes of stress-strain state of thin-walled engineering structures at variation of design and process parameters were defined.