Engineering Board Exam Reviewer · Engineering Materials · hard
Carbon fibers (tensile strength 3.5 GPa, diameter 10 m) are embedded in a matrix with an interfacial shear strength of 40 MPa. What is the critical fiber length?
- 0.8750 mm
- 0.2188 mm
- 0.4375 mm
- 4.375 mm
Answer
C. 0.4375 mm
Solution
lc = f d/(2 c) = 3500(0.010 mm)/(2 × 40) = 0.4375 mm.
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