hi everyone

            i am working on ansys.my task is stress analysis of  vcsel
membrane.for this one i am using layern shell181 element.
            vcsel structure has 25 layers of SiO2 and Si2N3 and i have to give
some initial stress value to these layers.for this one i am using ISFILE command
but the problem is that i am not able to use this command more then one time.if
i am using it override the previous stress input data.in one time i can give
only one particular stress value only.but i have to assign different stress
value in different layers.

       if someone  have some valueable suggestion plz reply me as early as
possible.

 with regards

rohit soni