Hello all,

Question 1: I am interested in extracting the total compliance value of topology-optimized structures. Would the final value of the objective function (strain energy) also be the total compliance value (sum of strain energy of all elements) for a compliance minimization problem subjected to volume fraction constraint? 

Question 2: What would be an ideal way to calculate the remaining volume of the optimized part as compared to the original design domain? In other words, if I need to show that with a comparison of volumes between the original and optimized design domain, how can I acquire the total optimized volume from the Abaqus model?

Question 3: How can I extract the global stiffness matrix from Abaqus into a notepad file? I have tried doing it using the method mentioned in the link below but to no avail. 

https://xizou.github.io/2016/04/07/how-to-export-stiffness-matrix-from-abaqus/

Thanks!