Question: For each of the bar elements shown in Figure P3-15, evaluate the global x - y stiffness matrix. Figure P3-15 (a) (b) E = 30

For each of the bar elements shown in Figure P3-15, evaluate the global x - y stiffness matrix.

Figure P3-15

(a)

E = 30 x 10° psi A = 3 in? L = 20 in. 45°

(b)

2 E = 15 x 10

(c)

E = 30 x 10 psi A = 3 in? L =

(d)

20 in. 45 2 E = 15 x 10" psi A =

E = 30 x 10 psi A = 3 in? L = 20 in. 45 2 E = 15 x 10" psi A = 1 in? L = 15 in. 90

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