I have heard of some article submission websites that require you to copy the content of your article in order to gain the backlink from the website.
But overall, I think its best to avoid duplicating content from one website to another. From my understanding, search engines can pick up on duplicate articles or articles that were copied from another article: Original content seems to always provide the highest yield with traffic and conversions.
With that being said, you may want to paraphrase your articles on other sites so that each article remains unique in its own way. When you do it this way, each article can also be optimized for a specific set of keywords.
Hope this helps! Great Question