A three-point bending test is performed on a glass specimen having a rectangular

Question

A three-point bending test is performed on a glass specimen having a rectangular cross section of height d = 5 mm (0.2 in.) and width b = 12 mm (0.4 in.); the distance between support points is 50 mm (1. in.). (a) Compute the flexural strength if the load at fracture is 29 N (66 lbf). (b) The point of maximum deflection, ?y, occurs at the center of the specimen and is described by where E is the modulus of elasticity and I is the cross-sectional moment of inertia. Compute ?y at a load of 266 N (60 lbf). Assume that the elastic modulus for the glass is 60 GPa. compute delta y at the load?

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