Ask Question
22 February, 12:04

A composite material is to be designed with epoxy (Em 3.5 GPa) and unidirectional fibers. The longitudinal elastic modulus of the designed composite material is to be at least E 320 GPa. If the fiber volume fraction is 70%, calculate the minimum elastic modulus requirement of the fiber material.

+1
Answers (1)
  1. 22 February, 12:19
    0
    Minimum elastic modulus of fiber = 455.64 GPa

    Explanation:

    Contents of composite material = Epoxy and Unidirectional fibers

    Elastic modulus of epoxy = 3.5 GPa

    Elastic modulus of composite material = 320 GPa

    Volume fraction of fiber = 70 %

    Volume fraction of epoxy = 100 - 70 = 30%

    Elastic modulus of composite material = 3.5 x 0.3 + Elastic modulus of fiber x 0.7 = 320

    0.7 x Elastic modulus of fiber = 320 - 1.05 = 318.95

    Elastic modulus of fiber = 455.64 GPa

    Minimum elastic modulus of fiber = 455.64 GPa
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “A composite material is to be designed with epoxy (Em 3.5 GPa) and unidirectional fibers. The longitudinal elastic modulus of the designed ...” in 📗 Physics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers