Question

11-3 A steel plate is 300 mm wide and 6 mm thick. There is a 25 mm-long crack along each edge. If K_c = MPa m^{1/2}: (a) Calculate the force required to propagate the crack the remaining 250 mm across the width of the plate. Ans : 455kN (b) Calculate the force required to break the plate in tension if there were no crack. Assume that the fracture strength is 700 MPa. Ans : 1.05 MN (c) Calculate the force required to break the plate in tension if the steel had the theoretical cohesive strength. Ans : 25MN

          11-3 A steel plate is 300 mm wide and 6 mm thick. There is a 25 mm-long crack along each edge. If K_c = MPa m^{1/2}:
(a) Calculate the force required to propagate the crack the remaining 250 mm across the width of the plate. Ans : 455kN
(b) Calculate the force required to break the plate in tension if there were no crack. Assume that the fracture strength is 700 MPa. Ans : 1.05 MN
(c) Calculate the force required to break the plate in tension if the steel had the theoretical cohesive strength. Ans : 25MN

$11-3 A steel plate is 300 mm wide and 6 mm thick. There is a 25 mm-long crack along each edge. If Kc = MPa m^1/2: (a) Calculate the force required to propagate the crack the remaining 250 mm across the width of the plate. Ans : 455kN (b) Calculate the force required to break the plate in tension if there were no crack. Assume that the fracture strength is 700 MPa. Ans : 1.05 MN (c) Calculate the force required to break the plate in tension if the steel had the theoretical cohesive strength. Ans : 25MN$

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