ASSIGNMENT SPECIFICATION PART 1: Analysis of a simple plate A flat steel plate measuring 0.8 m x 1.2 m, is proposed as a possible design solution for a structure which is required to withstand a uniform pressure of 90 kN/m². It is not impossible that the proposed design does not work! The steel for the plate has E = 207 GPa, v = 0.3, σy = 525 MPa and p = 7.85 kg.I¹. The thickness of the plate is taken as 5 mm. The plate is supported at all edges, see Figure 1. Design criteria Figure 1: Plate subjected to uniform pressure The central deflection of the plate is a key design requirement and must be determined. The stress level in any part of the plate must also be determined in order to check for plastic failure (whether it exceeds the yield stress, σy.)./nAnalysis Using Ansys perform a finite element (FE) analysis to determine (a) The deflection at the centre of the plate. (b) The stress at the centre of the plate. (c) The maximum stress in the plate, if different from (b). There are different ways to model the structure, e.g. all shell elements, all solids, but make sure you justify your decisions. Some models are inherently less suited to this geometry than others, and will be marked less generously. You will also have to decide on the mesh density you use, and justify the type and quality of elements. It is also likely that the software applies certain approximations by default. You are advised to check these and comment. It is also possible that you want to apply simplifications to the model. This is fine, often desirable in many cases, but please justify your decisions. Reporting The following outputs must be included in your report: (a) A detailed discussion of the model, choice of element types used and quality, your determination of a suitable mesh density, various approximations (by default, or chosen), etc. .... You are advised to consider a robust but sensible convergence study. (b) A deformed contour plot from the FE analyses showing displacement contours (to show maximum central plate deflection). (c) A deformed contour plot from the FE analyses showing stress contours (to show maximum plate stress). The two contour plots should be usable and readable. Simple raw screen shots are unlikely to obtain the full marks. Pay attention to the readability of the legend, the size of the plot, and to superfluous features. If you are unsure of what a deformed contour plot is, check with the module leader!

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