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Fundamentals of Machine Design P30

.Design of transverse fillet joint: Consider a single transverse joint as shown in figure 10.4.2. The general stress distribution in the weld metal is very complicated. In design, a simple procedure is used assuming that entire load P acts as | Module 10 Design of Permanent Joints Version 2 ME IIT Kharagpur Lesson 4 Design of Welded Joints Version 2 ME IIT Kharagpur Instructional Objectives At the end of this lesson the students should be able to understand Possible failure mechanisms in welded joints. How to design various kinds of welding joints. 1.Design of a butt joint The main failure mechanism of welded butt joint is tensile failure. Therefore the strength of a butt joint is P sTlt where sT allowable tensile strength of the weld material. t thickness of the weld l length of the weld. For a square butt joint t is equal to the thickness of the plates. In general this need not be so see figure 1 . Figure 10.4.1 Design of a butt joint 2.Design of transverse fillet joint Consider a single transverse joint as shown in figure 10.4.2. The general stress distribution in the weld metal is very complicated. In design a simple procedure is used assuming that entire load P acts as shear force on the throat area which is the smallest area of the cross section in a fillet weld. If the fillet weld has equal base and height h say then the cross section of Version 2 ME IIT .