1.How much the magnitude of modulus of elasticity E of Pyroceram (Glass-ceramic, E0=120 Gpa) decreases with volume fraction porosity P = .1,.2,03,.4,.5,.6,.7,.8,.9?(show the drawing of it ?
2.The modulus of elasticity for boron carbide (B4C) having 5 vol% poroosity is 290GPa compute the modulus of elasticity for the nonporous material.
3.A three point bending test is performed on a glss specimen having a rectangular cross section of hight d =6 mm and width b = 12 mm the distance between support points is 45mm.
compute the flexural strerangth if the load is fracture is 290N