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II.1.11.3 In-plane rotations of vectorial and tensorial properties

The material scalar properties are left unmodified by in-plane rotations. The same is true for the out-of-plane quantities q3 and λ33T . The transformation of components for q and λT is noted with the transformation matrices defined in expressions (II.1.10) to (II.1.10):

λT 12 = S-(θ) λT xy S+ (θ),
λT xy = S+ (θ) λT 12 S-(θ),
qxy = S+ (θ) q12,
q12 = S-(θ) qxy.