COMPUTER AIDED DESIGN AND OPTIMIZATION OF WELDED JOINTS

Abstract

The main objective of this work is the design and the optimization of arc welding joints by using the traditional design calculation and the widely used standard code (AWS). Different failure theories have been used. The effect of static and dynamic loading is also taken into consideration. A special software has been developed to facilitate the design and optimization of welded joints. Built-in databases for base and welding materials that are commonly used iii the welding process are included. A special sub program has also been developed to evaluate the section properties for any welded section composed of linear or circular segments. The A WS welding procedure provides the tool to select from the types of weldments considered in the code. Maximum and minimum stresses

are evaluated for each segment and the minimum factor of safety with its location on the section is displayed. Using suitable optimization technique and exterior penalty function, the optimum welding for minimum volume is obtained subjected to the safety factor and thickness constraints. The outputs are presented graphically. Using this optimization procedure, several optimized welds have achieved a lot of material saving.