Yes, you can post your preprint, which is your onw write up of your results and analysis, anywhere at any time. If you have poster you preprint on ArXiv, which is a non-commercial preprint server, you can also immediately update this version with your accepted manuscript. In all cases, posted manuscripts should link back to the final published article on ScienceDirect and should have a non-commercial, non-derivative user license attached (CC BY-NC-ND). For any further clarifications, you can submit your query via our online form