Agraphite -epoxy -reinforced plastic with longitudinal fibers contains 30% graphite fibers, which have a strength of 2500 mpa and an elastic modulus of 300gpa. the strength of epoxy matrix is 120mpa, with an elastic modulus of 100gpa. determine a) elastic modulus of the composite b) elastic modulus of the composite if the fibers are oriented in transverse direction. c) fraction of the load supported by the fibers.

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)