V Poisson ratio

In performing such experiments on isotropic materials, one is accustomed to express the elastic stiffness parameters in the experimentally more readily accessible technical parameters E (Young s modulus) and v (Poisson ratio). The relative change in length, in the direction of the tensile stress a is, by definition, given by (Al/t)i — a/E, whereas v = (Af/ )x/( A / )u. For several magnetostrictive films and substrates, E and v values are listed in table 1. Some useful relations are ... 

Stt = Thread tooth stress intensity, PSI Combined stress, PSI (Tx = Average longitudinal stress, PSI bending stress, PSI V = Poissons ratio (8 = Damping factor... 

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