ENG2087 - Design Project - FEA - Structural Platform Supporting a 5kN - Engineering Assignment Help

Assignment Task:

ENG2087: Engineering Assignment Help

1. Introduction

The aim of this assignment is to demonstrate progress in optimising the mass of a structural platform within a series of design constraints. The task requires many of the modelling techniques that you have used during Weeks 1 to 5. You may need to refer to the notes and guidance from those exercises to complete the task. As with many modelling exercises, there are multiple ways of creating the geometry and mechanical conditions. The deliverable for the assignment is a report that captures your approach, sound modelling practice and important simulation output.

2. Geometry

You are tasked with creating a structural platform supporting a 5kN load at its centre. The platform is made of two principle components: a metal frame fixed to a composite panel (Figure 1). The load is placed as in Figure 1 and should not be redistributed. When all the layers are combined, the total depth of the composite panel should not exceed 26mm. The length and width of the composite panel are fixed at 500 mm and 250 mm (Figure 1). The load is distributed over an area measuring 100 mm x 50 mm. The panel should lie in the horizontal plane. The metal frame must be 50mm deep at the corner and extend to the full width (250 mm) of the panel. The frame should be made from box section material.

3. Technical Requirements

The platform should be modelled in a way that is as numerically efficient as possible. The panel is fixed to the wall by bolts. However, this does not need to be incorporated in your model and should be approximated using modelling techniques used during the course. The supporting frame should be as light as possible. This goal may be achieved by altering the materials (Section 4) and the dimensions of the box section so long as none of the dimensions in Figure 1 are altered. The panel must make best use of the efficiencies offered by a sandwich construction and therefore make use of a foam core. The maximum overall displacement under load must nowhere exceed 5 mm. There is no need to consider the factor of safety of the foam core but other components must be demonstrated not to fail.

4. Materials

The frame is to be made from steel or aluminium alloy (using the ANSYS material models). The panel must be of a sandwich construction. The foam core material that you are to use is Modipur US 569 B produced by HEXCEL (Table 1). This must be applied in 5mm layers. You may use a mixture of 0o and 90o surface plies of either Glass Fibre Reinforced Polymer (GFRP) or Carbon Fibre Reinforced Polymer (CFRP) (Table 2). These plies must be applied in 0.5mm layers and show consideration of good engineering practice. For the foam core, GFRP and CFRP, the material properties that you will need to enter into ‘Engineering Data’ are given in Tables 1 and 2. Parameters required for manual calculation of the factors of safety for GFRP and CFRP layers are given in Table 3. In the panel, you need only consider failure in tension and may ignore compression and shear stresses.

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