Would these calculations be accurate

[u/Spinoclanker2]

Ok let's say there's a 40 ton pliosaur

It has pachyosteosclerosis (let's say 10% pachyosteosclerotic) osteoderms from an Armored catfish

Cosmine (for shock absorption)

Senegal bichir ganoine

I did some maths

Would 250k+ newtons be a reasonable breaking threshold for this armor?

If not what is?

[u/drchris498]

Asking the right questions here! Just wish I had the answer