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Unformatted text preview: which has the strength of 3500 MPa and an elastic modulus of 73 GPa. The strength of the epoxy material is 120 MPa and its elastic modulus is 100 GPa. (a) Calculate the elastic modulus of the composite and the fraction of the load supported by the fibers. (b) If Boron fibers (strength: 3500 MPa, and elastic modulus: 380 GPa) are used instead of glass fibers, what should be the Boron fiber percentage to maintain the same elastic modulus? 3. A solid cylindrical part is to be made such that its final length is 30 mm. It is known that linear shrinkages of this part are 8% and 7% during drying and firing. Calculate (a) initial length of the part and (2) the dried porosity, P d , if the porosity of the fired part, P f , is 9%...
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This document was uploaded on 04/23/2011.
 Spring '09

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