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ID: 1767041 • Letter: 0
Question
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A thin rectangular roof is made of a fiber reinforced polymeric composite. The composite is comprised of 10 unidirectional laminae with a total thickness t=2 mm. The fibers are aligned with the long side of the roof. The fiber and matrix phase properties are E1f=300 GPa; Em=3 GPa; Vf=0.7; and the lamina properties are E2=8 GPa, n12= 0.3 and G12=6 GPa. The roof is subjected to a uniform normal stress of 100MPa in the fiber direction.
Determine the complete set of properties of the composite lamina
Calculate the state of strain in the system of coordinates where the fiber direction is a coordinate axis
Calculate the normal strain at 30° with the fiber direction
Explanation / Answer
The answer of following question is as follows .
The normal strain at 30 degree is 650 mpa.
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