Page 132 - Analysis and Design of Machine Elements

Analysis and Design of Machine Elements
110
power and oil industries. Welded joints are superior to riveted joints for strong strength,
light weight and low cost. Nevertheless, welding may generate unacceptable residual
stresses and thermal distortions if the welding process is not properly controlled.
5.2.2 Types of Welded Joints and Types of Welds
Welded joints refer to the relationship between connected parts. Basic welded joint
designs in fusion welding include butt, lap, T-, edge and corner joints [7]. Welds are
named after the edge geometry of the parts to be jointed. Basically, two types of weld
seams are available. The first is butt welds, which are used to join components within
a plane. The second is fillet welds, which are used to connect components in different
planes. They are usually designed as equal-leg right angles. Representative weld joints
and welds are presented in Table 5.2.

5.2.3 Strength Analysis
Loads acting on a weldment may be uniformly or eccentrically applied to the weld. Sim-
ilar to the previous treatment of loads on bolts and rivets, complex loads on a weldment
Table 5.2 Types of welded joints and welds.

Typesofweldedjoints Types of welds
60° 60° 45°

Square butt Single vee Double vee Single bevel butt
Butt joint
groove groove

Lap joint Fillet weld

T-joint Fillet weld

Corner joint Corner weld

Edge joint Edge weld