Hygro-thermal Effects on Laminate:
When thermal as well as hygral strains are present in total strain, then

(5.128)

The resultant in-plane forces are given as

(5.129)

and the resultant moments are given as

(5.130)

Equation (5.115) and (5.116) are combined as

(5.131)

The inverse of this equation is written as

(5.132)