If someone publishes his/her work with a closed-access journal, is there any problem to disseminate your research work (without informing the editor) to the people who use different platforms to ask for your research article? As per my knowledge, closed-access journals don't allow researchers to share their work with others.
The same question goes for books or chapters of the book.
If any professor wants to share his similar sort of research work or book chapters with his students, for teaching purpose, is it ethically justified?
Is there any timeline involved after which we may share it?