Development of methodology for calculation of discontinuous circular welds in torsion

Abstract

The main criterion for the performance of welds is the strength. The least durable are the corner joints used to perform various types of welded joints. In the literature, the methods of calculating the strength of welded joints with solid seams are considered in sufficient detail. Methods of calculation of connection interrupted sutures absent. In this case, the greatest difficulty is the calculation of connections using circular intermittent seams, which are often performed in welded drums and pulleys. They work on torsion. Therefore, the development of methods for calculating circular intermittent seams for torsion is quite important. Shear stresses in welds from torque are determined depending on the value of the polar moment of resistance of its dangerous section. When determining the polar moment of resistance of the dangerous section of a circular discontinuous seam, it was represented by a set of sections in the form of a sector of a circular ring. The method of calculation of the polar moment of resistance of the rotated dangerous section of a circular discontinuous weld, which takes into account the relative length of the weld areas and their number, is proposed, as well as the method of accurate and approximate calculation of shear stresses in the weld.

Modern Fiber Art Creation Based on Traditional Hakka Hand Tie-Dyeing Process Based on Carbon Nanotube Nanomaterials

“…e number, arrangement, and interaction of defects can affect the thermal conductivity of carbon nanotubes. Studies have shown that the thermal conductivity of carbon nanotubes is generally contributed by two parts: the interaction between electrons and phonons and the interaction between phonons and phonons [19][20][21]. For carbon nanotubes, the interaction between phonons and phonons plays a major role in the entire heat conduction process; due to the large energy gap and low density of free carriers, the interaction between electrons and phonons makes little contribution to the thermal conduction process of carbon nanotubes [22].…”