Ttttt

40 mm

100 kN

100 kN

400 mm

100 kN

400 mm

100 kN

100 mm

Fig. 9.60.

(b) Determine the corresponding element principal stresses and their directions, and show these on a sketch of the web.

[0.058, -0.60, -0.10 mm, 123.6 MN/m2 (T) at -31.7° from ^-direction, 323.6 MN/m2 (C)]

9.12 Derive the stiffness matrix in global coordinates for a three-node triangular membrane element for plane strain conditions. Assume the displacement functions are the same as those of Example 9.5.

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