Doesn’t apply here, say for example i have a piece of steel with length 100mm and it stretches 10mm, is mm/mm the strain would be 0.1 mm/mm, in meters it would be 0.1m/m
Really strain is dimensionless but occasionally people add units
Because practicality. Strain generally occurs across mm scales at most for most traditional tensile tests and relevant materials. Normally it’s actually much less than mm. Occasionally you see micrometers/micrometers.
Welcome to engineering, where we have MPa as a unit of stress and mm/mm as a unit of strain!
mm/mm?? why not call it m/m?
Why km/h (or mph) and not ft/year? Because the numbers have a nicer magnitude then.
Doesn’t apply here, say for example i have a piece of steel with length 100mm and it stretches 10mm, is mm/mm the strain would be 0.1 mm/mm, in meters it would be 0.1m/m
Really strain is dimensionless but occasionally people add units
I feel like I should’ve spotted that… they’re the same units. 🤦
Because we’re precise!
Because practicality. Strain generally occurs across mm scales at most for most traditional tensile tests and relevant materials. Normally it’s actually much less than mm. Occasionally you see micrometers/micrometers.
How is it more practical when 1 m/m = 1 mm/mm = 1 μm/μm?
I was told that you also sometimes have four basis vectors in 3D