No.  Once the submission deadline for the workspace or assignment has passed you can no longer submit work.  You will need to contact your tutor or lecturer to request an extension.  If an extension is approved you will be able to submit your work to the workspace.

REMEMBER:  You only need to submit your work ONCE.  If you have submitted before the submission deadline you can continue to make changes to your work in Pebble+ and these changes will be visible on the workspace automatically (you don''t have to submit again each time you make changes).  Your work on the workspace will continue to reflect any changes you make until the revision deadline passes.