the qualitative deformed shape of the structures under the given loads (See Figures 6(a) and 6(b)). A Figure 6 (a) W B B
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- A test is conducted on a beam loaded by end couples. The fibres at layer CD are found to lengthen by 0.03 mm and fibres at layer AB shorten by 0.09 mm is 20 mm gauge length as shown in the figure. Taking E-2×10 N/mm², the flexural stress at top fibres would be CD A B 50 mm 100 mm (a) 900 N/mm² tensile (b) 1000 N/mm² tensile (c) 1200 N/mm² tensile (d) 1200 N/mm² compressive →→ 75 mmProblem Solving. Solve the following truss determinacy and equibrium problems shown: (A) (B)Two polymer bars are connected to a rigid plate at B, as shown. Bar (1) has a cross-sectional area of 1.58 in. and an elastic modulus of 2430 ksi. Bar (2) has a cross-sectional area of 0.714 in and an elastic modulus of 4110 ksi. Assume Ly-18 in., Lz-47in, Q=6,4 kips, P-3.2 kips, and R-128 kips. Determine the horizontal deflection of end Crelative to end A. (1) Answer: uCA in.
- At a certain point in a structural member, the value of ox = -45 N/mm², ay = 75 N/mm² and t = 45 N/mm2. The principal stresses will beNarrow bars of aluminum are bonded to the two sides of a thick steel plate as shown. Initially, at T₁ = 70°F, all stresses are zero. Knowing that the temperature will be slowly raised to T₂ and then reduced to T₁, determine (a) the highest temperature T₂ that does not result in residual stresses, (b) the temperature T₂ that will result in a residual stress in the aluminum equal to 58 ksi. Assume aa = 12.8 x 10-6/°F for the aluminum and a = 6.5 × 10-6/°F for the steel. Further assume that the aluminum is elastoplastic with E = 10.9 × 106 psi and ay = 58 ksi. (Hint: Neglect the small stresses in the plate.) Fig. P2.121Dont round off initial values, round off final ans only pls asap