able 11.3. The engineering constants in Example 11.1 E, (GPa) E2 (GPa) G12 (GPa) V12 Nominal (v = 0.6) Back calculated (vf =0.55) 148 9.65 4.55 0.300 Rule of mixtures 136 0.304 Modified rule of mixtures 9.00 4.14

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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Original question: The nominal engineering constants of a unidirectional graphite epoxy ply are given in Table below for a fiber volume fraction of 60 percent. The fiber volume is reduced to 55 percent. Estimate the engineering constants for this reduced fiber volume fraction. New question needing to be answered: Repeat with a reduced fiber volume fraction of 40 percent representative of lower fiber volume fraction materials. Table:
Table 11.3. The engineering constants in Example 11.1
E, (GPa)
E2 (GPa) G12 (GPa)
V12
Nominal (vf = 0.6)
Back calculated (vf =0.55)
148
9.65
4.55
0.300
Rule of mixtures
136
0.304
Modified rule of mixtures
9.00
4.14
Transcribed Image Text:Table 11.3. The engineering constants in Example 11.1 E, (GPa) E2 (GPa) G12 (GPa) V12 Nominal (vf = 0.6) Back calculated (vf =0.55) 148 9.65 4.55 0.300 Rule of mixtures 136 0.304 Modified rule of mixtures 9.00 4.14
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