1. A method comprising: entering a set of composite material properties into a computer memory, including; a composite modulus in a first direction; a composite modulus in a second direction normal to the first direction; a composite shear modulus in a plane that includes the first direction and the second direction; a composite Poisson ratio in a plane that includes the first direction and the second direction; entering a composite microstructure into the computer; processing the set of composite material properties and the composite microstructure to determine adjusted material properties of all constituents of the composite material, wherein a set of fixed constituent property constraints are utilized to obtain the adjusted material properties.