Cutting forces for an ROV

[needhelp321]

I am currently designing an ROV manipulator arm, it has to cut mild steel cable 20mm thick and mild steel rod 12mm thick. Also it has to operate at depth of 600m.

I am struggling with some calcualtions, I have chosen a cable and bar cutter, this forces a shaped cutter against the object and slices it in two.

These are widely used however I cannot find any calcs to find cutting forces required and therefore what the hydraulic requirements are.

Can anyone help?

[stewartcs]

I am currently designing an ROV manipulator arm, it has to cut mild steel cable 20mm thick and mild steel rod 12mm thick. Also it has to operate at depth of 600m.

I am struggling with some calcualtions, I have chosen a cable and bar cutter, this forces a shaped cutter against the object and slices it in two.

These are widely used however I cannot find any calcs to find cutting forces required and therefore what the hydraulic requirements are.

Can anyone help?

Your cutting tool cuts by creating a shearing force strong enough to cause the material to yield to the point of rupture. It's common to use Distortion Energy Theory to perform the calc. Research that and you should find your answer.

CS