UNIVERSITI TEKNIKAL MALAYSIA MELAKAFACULTY OF MECHANICAL ENGINEERING

DMCD 3523 – ENGINEERING DESIGN

TUTORIAL 4 – DESIGN OF PERMANENT JOINTS

Q1 An 8 mm steel bar is welded to a vertical support as shown in the Figure 1. What is the shear stress in the throat of the welds if the force F is 140 kN?

Figure 1

Q2 The permissible shear stress for the weldment illustrated is 140 MPa as shown in the Figure 2. Estimate the load, F that will cause this stress in the weldment throat.

Figure 2

Q3 A torque T = 2 kN.m is applied to the weldment shown in Figure 3. Estimate the maximum shear stress in the weld throat.

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Figure 3Q4 Figure 4 shows a welded steel bracket loaded by a static force F.

Estimate the factor of safety if the allowable shear stress in the weld throat is 120 MPa.

Figure 4

Q5 A shaft of rectangular cross-section is welded to support by means of filled welds as shown in Figure 5. Determine the size of welds, if the permissible shear stress in the weld is limited to 75 N/mm2.

Figure 5

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