NUTR 431D2 Study Guide - Final Guide: Neutral Axis, Muscle Contraction, Compressive Stress
Document Summary
Question 1: axial compatibility (a) psteel = pab = 48 kn ( ab = 96 mpa < 350 mpa ok!) Paluminum = pbc = 32 kn ( bc = 16 mpa < 300 mpa ok!) (b) plate = ab = bc = 0. 1143 mm (extension of ab = shortening of bc) M(x) = - 70 kn-m for 0 < x < 4 and m(x) = 8. 75x 105 kn-m for 4 < x < 12. Note: easier to flip problem around from right to left. Question 4: column buckling for two 50 mm diameter steel rods. Pab = 0. 5556p (compression) < pcrit/2 = 12. 11 kn to give p < 21. 8 kn (also check that pcrit < py) Pbc = 0. 8013p (compression) < pcrit/2 = 23. 29 kn to give p < 29. 1 kn kn (also check that pcrit < py) Therefore, buckling in member ab governs and p = 21. 8 kn.
