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Summary This exercise involves in the utilization of software called Ansys 6.1 to analyse a beam cantilevered with one of its end fixed and a load applied at its other free end. The beam is modelled in Ansys using Solid95, an element type available in the software. On applying a load of 120 N it is seen that the beam undergoes a displacement of 15.49 mm. The beam is then modified and another analysis is carried out. A rectangular section is cut in the centre of the beam and its new load carrying capacity is evaluated by finding the reaction force acting on the beam. It is seen that the beam is now weaker. Before modifying the structure and the load required to create a deflection of 15.49mm was 120 N. After modification, to cause the same deflection of 15.49mm, the load required has dropped to 91.733 N. In this report we discuss how these two analysis are carried out along with why and how various parameters, required for modelling and solving, are considered. 1. Introduction 1.a Requirements This exercise involves in analysing a beam of aluminium alloy with variable thickness and dimension. Two different cases are analysed using the software called Ansys6.1. For the first case the deflection of the beam is computed and in the second case the beams structure is modified and its load carrying capacity is evaluated. 1.b Problem Description 1.b.1 CASE 1 A beam of aluminium alloy, with variable thickness and dimension, as shown in figure 1 is modelled in Ansys. 150 mm 5mm 3mm 300mm Figure 1 The face at AB is fixed and a uniformly distributed load of 120N is applied on the other end at CD. The deflection of this end is computed. 1.b.2 CASE 2 A uniform rectangular hole is removed from the face of the previous model. The cut out section is evenly spaced either side of the beam centre line. The corners of the rectangular incision are radiused with a 5mm fillet. This symmetric incision is depicted in figure 2. 90mm 100mm 50mm Figure 2 As before the end AB is constrained and a displacement, equal to that computed in case 1, is applied on the free end CD.
Approximate Word count = 1437
Approximate Pages = 5.7
(250 words per page double spaced)
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