Depends on what application the Nm is being subjected to. If the torque was on a circular shaft the method is as follows:
If the torsional shear stress is 250 Mpa, on a Beryllium Copper wire.
Diameter = 1.5mm (d)
Length of rod = 40mm (L)
Shear Modulus of elasticity (G) = for BCu wire = 48Gpa or 48*109 N/m2
Polar moment of Inertia (J) = (pi *d4) / 32 (for circular cross section)
J = (pi * (.00154)) / 32
J = 4.97*10-13 m4
t = torsional shear stress
Torque = T where T= ( t max * J ) / c
c is distance from the point of interest. In this case c would be from the center of the rod to the edge of the rod. ( c = d/2 ) in m. c = .0015/2 = 7.5*10-4m
letting t max be 250 Mpa..
250 MPa = 250*106 N/m2
T = ((250*106 N/m2) * (4.97*10-13 m4)) / (7.5*10-4m)
T = .165Nm
Of course the computed Torque seems low, but don't forget how small this wire is. 250MPa is stress Stress = Force / Area - the smaller the Area the greater the stress.
SO for such a small wire only .165Nm is needed to create 250MPa of stress.
To answer your question, "How do you convert MPa to Nm" You would need the application with the list of materials and dimensions.
G was for theta. Im doing that on my homework right now =P
theta (angle in rad ) = TL / GJ
theta = (.165Nm *.040m) / (48*109 N/m2 * 4.97*10-13m4)
theta = .278rad
angle = (.278*180)/pi = 15.9o I am pretty sure that is right. I'm studying Strength of Materials right now, best way for me to study is teaching other people the material I learn.
PS this is a conversion from a pressure, to a torque....pretty stupid
1 pa = 1x10-5 bar or 1 Mpa = 10 bar, therefore, to convert from Mpa to bar you simply take the number of Mpa and multiply it by 10.
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Yield strength - 13.8 MPa Ultimate tensile strength - 31 MPa
Most stainless steels have a strenght of at least 500 MPa. Most alloy steels also have that strength.
520 Mpa
1 pa = 1x10-5 bar or 1 Mpa = 10 bar, therefore, to convert from Mpa to bar you simply take the number of Mpa and multiply it by 10.
There are 6.8948 MPa in one ksi. To convert ksi (kips per square inch) to MPa (MegaPascals), multiply the number of ksi by 6.8948.
To convert MPa units to psi units, you can use the conversion factor: 1 MPa = 145.038 psi. Simply multiply the pressure in MPa by 145.038 to obtain the pressure in psi.
There are 7960 mPa in 7.96 Pa. To convert from pascals (Pa) to millipascals (mPa), you multiply by 1000.
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To convert 0.50 MPa to psi, you can use the conversion factor: 1 MPa is approximately equal to 145.038 psi. Therefore, 0.50 MPa is approximately equal to 72.519 psi.
To convert ksi to MPa, you can multiply the ksi value by 6.89476. This is because 1 ksi is equivalent to 6.89476 MPa. For example, if you have a stress value of 50 ksi, you can convert it to MPa by multiplying 50 by 6.89476 to get approximately 344.7 MPa.
To convert millipascal (mPa) to pascal-seconds (Pasec), you need to understand that mPa is a unit of pressure, while Pasec is a unit of dynamic viscosity. To convert mPa to Pasec, you must also consider the fluid's density and temperature, as viscosity is dependent on these factors. If you are given a specific context where viscosity is measured in mPa·s (millipascal-seconds), you can directly convert by noting that 1 mPa·s equals 0.001 Pasec.
convert 15 nm into km
1000000
Multiply by 1000000.
You cant. One is a measure of rotational speed and the other is a measure of applied torque. You could convert Nm to Ft-lbs or In-lbs.