Question

Cerro 1000 A130 SA The allowable normal stresses on section A- A of a cast iron G-Clamp shown in the figure above are 30 MPa in compression and 15 MPa in tension If Ca = 13 mm, C2 = 12 mm and C3 = 80 mm with section properties given as: moment of inertia, 1 = 7.8 x 103 mm 4and cross-sectional area, A= 130 mm2 a) Determine the maximum clamping force, Brat equired for the G-Clamp section to reach the allowable compressive stress: i) Paz, Round your answer to 2 decimal places. N Submit part 3 marks Unanswered b Determine the maximum clamping force, Bras Fquired for the G-Clamp section to reach the allowable tensile stress: i) Part Round your answer to 2 decimal places. N Submit part 3 marks Unanswered c) What is the allowable clamping force, Pallothat can be applied without causing any failure on the G-Clamp section? i) Pillow Round your answer to 2 decimal places. N Submit part 2 marks Unanswered d Determine the resulting compressive stress due to the allowable clamping force, Pallow i oce Round your answer to 2 decimal places. MPa Submit part 3 marks Unanswered e) Determine the resulting tensile stress due to the allowable clamping force, Pallou i) 01 Round your answer to 2 decimal places. MPa

Answer 1

solution :- Scallowate = Bompa = 30MPa = 30 N/mm2 Stallowable = 15 Mpa = 15 N/mm2 N =P АА MAA = PX C₂ = top mm A = 130mm2 I = 7,8X1.3 mm C = 13 mm Cg = 12mm ) bemat I -P + MAAXCI < 30N/mm2 А -P + top to 13 < 30 N/mm2 130 70X103 P < 450 N =450N Pmate Etmax = P + MAAX C2 < 15 N/mm2 А 7 et 60px 12 < 15 P2 119.39 N 130 7800 119.39 N » Pmax. "T Pallow = minimum (119.39 $ 450) 119.39/N be= -119.39 box 119-39x13 768x103 = + 111:02 Mpa 6+ = 6maxt 15 Mpa