HW9 - 1 6.9 The beam of Figure P6.1 is fabricated from a...

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1 6.9. The beam of Figure P6.1 is fabricated from a channel and two bars by welding, details of the weld being shown in Figure P6.9. If the minimum weld thickness t = 1 mm, find the shear stresses in the weld. 3 1 A B 3 all dimensions in mm Figure P6.9 If we make a cut through the weld, the area of the flange that would drop off is A * = 30 × 3 = 90 mm 2 and the corresponding value of ¯ y * = 20 mm. The shear stress in the weld is therefore τ weld = V y A * ¯ y * I x t = 4000 × 90 × 20 0 . 288 × 10 6 × 1 = 25 MPa.
1 6.13. Find the location of the shear centre for the slit cylindrical tube of Figure P6.5.

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