Topics for writing in mechanical engineering journal.

PRAD CHAKRABORTYCAN ANYBODY ASSIST ME TO WRITE IN VARIOUS TOPICS IN THE RELEVANT JOURNALS REGARDING MECHANICAL ENGINEERING.

Earlier I mentioned about not writing in all caps. You have to get out of this habit first.
Some info on research paper writing is available here:
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Others have said a lot about technical writing.
You can select from these links:
<a href="https://www.google.co.in/search?q=How+to+write+technical+articles&ie=utf-8&oe=utf-8&gws_rd=cr&ei=i7qkVb_2G8ewuQSsv4roDw" target="_blank" rel="nofollow noopener noreferrer">How to write technical articles - Google Search</a>

Material Science
Engineering Mechanics
Engineering graphics
Thermodynamics
Manufacturing technology
fluid mechanics
CAD
machines and mechanisms
thermal engineering
strength of materials
vibrations and noise
heat and mass transfer
materials technology
gas dynamics
propulsion
mechatronics
metrology
quality control
FEA
CFD
transmission sustems
CAM
Robotics
digital image processing and machine vision
manufacturing and assembly
optimisation
neural network
industrial tribology
precision engineering
production management
AI
tool engineering
there are many moree...

mechanical engineering is a wide sector consisting of countless applications. As small as a pen to as big as a space station.

You can think of anything and everything.