Question: P5: A mechanically fastened single strap joint (Figure 1a) is used to transfer a tensile load of 71.1 kN between two composite components along

P5: A mechanically fastened single strap joint (Figure 1a) is used to transfer a tensile load of 71.1 kN between two composite components along its zero-direction. Both composite parts are well supported against secondary bending and of identical stacking sequence of [45/02/-45/902]s. The width of the joint is (250 mm). Material properties of the composite laminates are presented in Table 1. (a) Bolted joint (b) Bonded joint Figure 1: Bolted and bonded joints Table 1: Material properties of the composite laminate 1 E2 G12 V12 (GPa) 105 (GPa) (GPa) 9.5 5.3 0.3 Ultimate tensile strain 9,000 Ultimate compression strain 6,500 Ply thickness (mm) 0.13 You have been asked to design a bonded joint (Figure 1b) to replace the current mechanically fastened connection. The material properties of the selected adhesive are shown in Table 3. Table 2: Material properties of the adhesive Tp (MPa) 40 GA (MPa) 350 failure (rad) 0.4 0.4 A. Determine the thickness of the adhesive, t, by considering a (safety factor of 3) on the strength of the bonded joint (20 marks).
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