Anisotropic Thermal Expansion Property
Defines an Anisotropic Thermal Expansion Property by specifying a matrix of thermal expansion coefficients in Voigt notation, (epsilon_xx, epislon_yy, epsilon_zz, gamma_yz, gamma_zx, gamma_xy) = (T - T_o) * (alpha_1, alpha_2, alpha_3, alpha_4, alpha_5, alpha_6), where T is the current temperature, and T_o is the baseline reference temperature. Providing scalar fields as inputs will result in spatially varying material properties.