Something's not right with the K formula. It should have units of force/distance. But the equation shown would have units of force*distance. Perhaps the area should have square units but not be squared in the formula.
The a represents the radius as previously mentioned. You get area from pi a^2. If you give E (elasticity modulus) metric units (Pa = N/m^2), you get (N/m^2) * (m^2) / m. The two m^2 cancel out and you're left with N/m
Something's not right with the K formula. It should have units of force/distance. But the equation shown would have units of force*distance. Perhaps the area should have square units but not be squared in the formula.
If a is area perhaps it shouldn’t be squared? That would give stiffness as force per distance
a refers to the radius not the area
The a represents the radius as previously mentioned. You get area from pi a^2. If you give E (elasticity modulus) metric units (Pa = N/m^2), you get (N/m^2) * (m^2) / m. The two m^2 cancel out and you're left with N/m