you need to estimate the length of the beam and this should be taken as a cantil
ID: 1710287 • Letter: Y
Question
you need to estimate the length of the beam and this should be taken as a cantilever beam. find differnet widths of cars and provide logic to selecting a particular value.
Any missing values can be assumed/ estimated.
You are required to design a Cantilever Rack for a car salvage yard to store wrecked cars. Figure shown below should be taken as the design concept. Take maximum weight of a car to be 3000 kg. 15 marks] Concept You should calculate the maximum bending, shear and compressive stresses developed at the different members of the structure to identify maximumstresses. You may need to alter the number of cars from 0 to six to determine when the maximum stresses are developed. Hint: Idealise the structure and draw the SF and BM diagram of the members. Using the developed maximum SF and BM, calculate maximum bending stress (o) and shear stress (t) for different loading conditions. Calculate the bending stress using or Mc a stress M is where is the normal (due to bending), the maximum bending moment and is moment of inertia I bdi ere b is width and d is height of the beam, c is the maximum distance from the neutral axis (assume c half of the height of the beam d/2). Assume b and d as appropriate. Different combination of vehicle loads develop different bending stress in the pole close to the support. Calculate the compressive stress using a F/A where oc is compressive stress, F is the load applied and A is cross sectional area of the member. For shear stress use the shear force and the corresponding area parallel to the force.Explanation / Answer
General width of Cars is max of 2 m
although you can take 2.5 m for design consideration
UDL= 3000/2.5=1200kg/m
maximum bending moment = 1200*2.52/2= 3750 kg-m
maximum shear force = 3000kg
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