Inability to secure any research position after PhD and postdoc. I am stuck with my low prospects research field. How do I proceed with my career?
Never look for the job only in computational modelling. Start making a list of your skills:

Programming
Math
Mechanical engg
surface treatments

Take all the keywords from your paper. Or list common things that you can relate to industry. Search for these.
And it is not always necessary to always be in research after Postdoc. Even PhD in biology have found their way into programming.
Good luck.