The plane truss shown below is a simplified mode] for an aircraft engine mount.

Question

The plane truss shown below is a simplified mode] for an aircraft engine mount. The mount serves as a spring and shock-absorber. Here, we are modeling only the spring response of the mount. Assume two such mounts are used to secure a 5kN engine to the craft's engine cradle and the engine's weight is evenly distributed over the mounts. Determine the equilibrium height of the engine relative to the mounting location at point 1 (that is, determine the vertical distance between points 1 and 2 after deformation of the truss). Find the stress in the horizontal bar between 1 and 4. Show all your work. Inversion of the final global stiffness matrix may be performed with a calculator, Matlab. or Truss Solver. Take L = 25cm. All bars haw Young's modulus E = 80GPa. The horizontal bars has cross-sectional area A1 = 36mm2 and all other bars haw cross-sectional area A2 = 100mm2.

Explanation / Answer

draw the FBD identify the forces use equilibrium conditions and then u can get stresses from them

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