Question 4 [20 Marks] A cantilever graphene column has a stress-strain relationship shown in Eqn.1. The section of the c

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Question 4 20 Marks A Cantilever Graphene Column Has A Stress Strain Relationship Shown In Eqn 1 The Section Of The C 1 (37.5 KiB) Viewed 43 times

Question 4 [20 Marks] A cantilever graphene column has a stress-strain relationship shown in Eqn.1. The section of the column is shown in Fig. 4. The length of the column is 5 mm and buckling in the weak (z) axis is fully prevented. It is required to: (1) Calculate the critical buckling force (Nor) for the column using the tangential modulus theory. (2) Why does the tangential modulus theory typically underestimate the critical buckling load? What is the solution for this issue? o=1000-2000&² (GPa) (Eqn. 1) 4.0 4.0 1.0 1.0 Fig.4. Graphene column (mm). THIS IS THE END OF THE EXAMINATION