The problem of reducing the stress concentration on the boundary of the cavities medium under the dynamic load action
Journal Title: Вісник Тернопільського національного технічного університету - Year 2017, Vol 88, Issue 4
Abstract
The effectiveness of the use of additional barriers in the form of tunnel cavities of the elliptic section located on the wave propagation to reduce the dynamic concentration of stresses is investigated in this paper. The distribution of dynamic hoop stresses on the boundary of cavities and radial stresses in a medium are studied on the basis of the method combining the use of Fourier transformation in time and the method of boundary integral equations. Fixed time snapshots of stress fields are developed.
Authors and Affiliations
Olena Mikulich, Vasyl’ Shvabjuk
Assessment of destruction conditions of the long-term operation gas pipeline
For the long-term operation of main oil and gas pipeline steels the method of estimation the critical crack growth resistance of pipeline steels using experimentally obtained diagram of „force-deflection“ specimens destr...
Experimental and probabilistic numerical modeling of impact of fiber-reinforced composites at high and low velocities
Peculiarities of energy absorption dynamics and the damage of plates of multicomponent composite material are analysed depending on the impact speed at impact velocities ranging from 20 to 1500 m/s in view of causing the...
Contact problem for punch of complex shape and preliminary stressed semi-space
Determination of contact stresses and deformations in the interaction of rigid and elastic bodies stamps with existing permanent deformations is one of the most actual tasks of modern construction and engineering. As it...
The influence of corrosive environment on fatigue life of the t-shaped welded joints
The influence of corrosive environment (3% NaCl, high moisture and increased temperature and neutral salt fog and increased temperature) on the characteristics of fatigue resistance of T-welded joints of low alloy struct...
Synthesis of digital radio receiver system for secure communication with frequency-hopping spread spectrum
It was represented the results of synthesis and modeling of work of digital receiver based on the digital down converter (DDC), and a digital signal processor (DSP), which are used to process received signals. The method...