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22-Mec-B9 Advanced Engineering Structures: Undated paper

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Coffin–Manson constants and Miner’s cumulative damage
  2. Question 2 Yielding of a three-dimensional stress state: Tresca and von Mises
  3. Question 3 Sizing a square cantilever under combined compression and torsion
  4. Question 4 Three-cell wing box in pure torsion
  5. Question 5 Crack growth and the maintenance interval for a cracked wing skin
  6. Question 6 Shear centre and shear flow of an idealised wing box with a semicircular nose
  7. Question 7 Orthotropic lamina: reduced stiffness, ply transformation and stresses
  8. Question 8 Two-cell wing torsion box: shear flows and maximum shear stress

Start with Question 1 →

Paper format. 16-Mec-B9 Advanced Engineering Structures, national examination, 3 hours, open book, non-communicating calculators permitted. Eight questions are printed; the rubric states that any five constitute a complete paper and that all problems are of equal total value (20 marks each). All eight are worked below. The mark split inside each question is the one printed on the paper.

Reference texts. T. H. G. Megson, Aircraft Structures for Engineering Students, 6th ed. (thin-walled open and closed sections, shear flow, shear centre, multi-cell torsion, fatigue and fracture, laminated composites); A. P. Boresi and R. J. Schmidt, Advanced Mechanics of Materials, 6th ed. (yield criteria, torsion of non-circular prismatic bars); N. E. Dowling, Mechanical Behavior of Materials, 4th ed. (Coffin–Manson, Miner’s rule, Paris law); R. M. Jones, Mechanics of Composite Materials, 2nd ed. (reduced stiffness matrix, ply transformation).