3.9. An axial load P = 385 kN is applied to the composite block shown in Fig. P3.9. Determine the stress in each material. (Hint: You may name the nodes 1-2 for both the elements.) Rigid plate Brass 30 mm 30 mm E= 105 000 MPa Aluminum E = 70 000 MPa (2 60 mm 200 mm Section a-a FIGURE P3.9

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