Stress-strain analysis of hybrid joints using numerical simulation

Abstract

The design of joints between components of technical structures or equipment is a very important part of the design process and therefore significant attention must be paid to them. However, in certain cases, the values of the stress-strain state in a fixed joint exceed the strength limits, and it is therefore necessary to apply a combination of methods for a permanent joint, the so-called hybrid joint, which will lead to a reduction of evaluated stress-strain values. Problems of stress-strain state of hybrid permanent joints are analysed in this paper. Presented hybrid joint is formed by the combination of the pressed fit connection and fillet weld. The dimensional parameters and material properties each of type of connections are important for these hybrid joints application. Important parameters that affect the stress-strain state for this type of joint are mainly the size of the overlap of the pressed joint and also the geometric parameters of the fillet weld. In the framework of computer simulations and strength analyses are investigated the effects of different size of overlap of pressed fit joint and various design solutions of fillet weld joint on load capacity of hybrid connection under load. The results and some new knowledge resulting from these analyses are applicable in the design of similar types of joints in technical equipment and structures.