Verify the validity of the transformation relations given in Table 7.1 by: (a) Transforming the plane strain

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Verify the validity of the transformation relations given in Table 7.1 by:

(a) Transforming the plane strain Hooke’s law (7.1.3) into the corresponding plane stress results given in Exercise 7.6 .

(b) Transforming the plane stress Hooke’s law (7.2.2) into the corresponding plane strain results given in Exercise 7.1 .

Table 7.1

Table 7.1 Elastic moduli transformation relations for conversion between plane stress and plane strain

Equation 7.1 .3

= dext ey) + 2  gy = (ex + ey) + 2  = dext ey) = vax toy) txy = 2Mexy, txz = ty = 0

Data from exercise 7.6 Invert the plane stress form of Hooke’s law (7.2.2) and express the stresses in terms of the strain components:

dy || E 1- -(ex + vey) E 1-2 E 1+v -(ey + vex) exy

Equation 7.2 .2

ex = = (0x - voy) 1 E ey ez exy (ay - vox) - 17/7 (0x + 0) = ay) 1 + v E V 1 - 2 ( 1-v -(ex + ey) -Txy, exz =

Data from exercise 7.1 Invert the plane strain form of Hooke’s law (7.1.3) and express the strains in terms of the stresses as:

ex ey exy - 1 + ((1 - vox - voy] E 1+v E [(1 - v)oy - vox] 1 + v E -Txy

Equation 7.13

= dextey) + 2me. Gy = alext ey) + 2  = dext ey) = v(. + Gy)  = 2Mexy, tx = ty = 0

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