For the orthotropic case, show that by using arguments of a positive definite strain energy function, v

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For the orthotropic case, show that by using arguments of a positive definite strain energy function, v2ij i/Ej). Next, using typical values for E1 and Efrom Table 11.2, justify that this theory could allow the unexpected result that v12 > 1.

Table 11.2

Table 11.2 Typical Elastic Moduli for Some Planar Orthotopic Composite Materials Material E (GPa) E (GPa) V12

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