MT-1620 al.2002 Again, since these are physical ratios, engineering shear strain factor of 2 is used Again, these are not all independent. Just as for the Poisson's ratios there are reciprocity relations. these involve the longitudinal and shear moduli(since these couple extensional and shear or shear to shear). There are 12 of them M61 E,= m16 G6 n51E1=n15 n14G4 n62E2=126G6m52E2=n2565 2E2 44 163E3=n36G6n53E3=n35G5 n43E3=n34(4 Paul A Lagace @2001 Unit 5-p. 7MIT - 16.20 Fall, 2002 Again, since these are physical ratios, engineering shear strain factor of 2 is used. Again, these are not all independent. Just as for the Poisson’s ratios, there are reciprocity relations. These involve the longitudinal and shear moduli (since these couple extensional and shear or shear to shear). There are 12 of them: η61 E1 = η16 G6 η51 E1 = η15 G5 η41 E1 = η14 G4 η62 E2 = η26 G6 η52 E2 = η25 G5 η42 E2 = η24 G4 η63 E3 = η36 G6 η53 E3 = η35 G5 η43 E3 = η34 G4 Paul A. Lagace © 2001 Unit 5 - p. 7