Welded connections

Welding is the process of joining two pieces of materials utilizing heat and filler material to form a permanent connection: that is, it cannot be disassembled. Filler material is not used in some types of welding processes. Welding can cause welding residual stress and deformation in the welded structure, and certain defects will occur. Structural design should minimize the number of welds, select reasonable welded sizes and shapes, and reasonably select the structure form and arrange welded positions. This chapter describes and examines the design process of weld size, along with examples and solved/unsolved problems. The chapter studies force and stress analysis, and how to calculate the size of the different types of welds, such as thin fillet weld and butt weld. This chapter can be used as teaching material for courses in machine design for mechanical and industrial engineering majors in colleges and universities, and can also be used as a reference for scientific and technical personnel engaged in scientific and engineering calculations.