A fabric used in air-inflated structures is subjected to a biaxial loading that results in normal stresses σx = 120 MPa and σz = 160 MPa. Knowing that the properties of the fabric can be approximated as E = 87 GPa and ν = 0.34, determine the change in length of (a) side AB, (b) side BC, (c) diagonal AC.
Fig. P9.58

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