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Engineering · Mechanical Engineering
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The truss structure shown in Figure Ol is loaded at joint C with a point load of magnitude 20 KN in the members are made from aluminum alloy with a Youngs modulus of 70 GPa and have an uniform cross- (a) Describe the necessary criteria for a plane truss member. Thus, sketch a finite element model of the direction shown The truss is simply supported at joints A and is free to roll horizontally at joint B. A sectional area of 400 mm whole truss structure, labelling all nodes and elements, and indicating the status of all boundary [5 marks (b) Using the finite element method, solve for the unknown degrees-of-freedom of the sstem, hence 120 marks conditions (degrees of-freedom) and relevant loads and reactions obtain the stresses in member BC. 20kN 30° 300 mm k 150 mm -+ 250 mm Figure 01

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