Question 9.6: (a) Evaluate the element stiffness matrix, in global coordin...
(a) Evaluate the element stiffness matrix, in global coordinates, for the three-node triangular membrane element, labelled a in Fig. 9.43. Assume plane stress conditions, Young’s modulus, E = 200 GN/m², Poisson’s ratio, ν = 0.3, thickness, t = 1 mm, and the same displacement functions as Example 9.5.
(b) Evaluate the element stiffness matrix for element b, assuming the same material properties and thickness as element a. Hence, evaluate the assembled stiffness matrix for the continuum.
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