Output Total Force on a Straight Line

Dear All,

 I am using ANSYS 13.0 APDL to simulate a elastic model to calculate stress intensity factor. I got the solution successfully. However, I want to verify the answer with theoretical solution from crack analysis handbook. So I need to output the total force on a straightline. 

 I had tried to check the force on each node on the line. But the value is varying and different from each other. So I hope to figure out the total force on this line. Should I just sum up all the nodal force on this line? Or is there any other way to output the total force? 

I had also tried to define the path. But there is no way to output total force on this path. Any one can help? 

Thank you very much in advance.

Best regards,

Wangyu Ma

National Center for Asphalt Technology, Auburn, AL