Week - 1 - Consistency of units
AIM:
To write the conversion of the unit that requires in the LS-Dyna system.
OBJECTIVE:
Need to find conversion factor for following unit system that is mentioned below.
The value of the measurement is given as follows:
- MASS 1kg.
- LENGTH 1m.
- TIME 1s.
- FORCE 1N.
- STRESS 1Pa.
- ENERGY 1Nm.
- DENSITY 1Kg/m.
- YOUNG'S Modulus 210GPa.
- VELOCITY 56.33KMPH.
- GRAVITY 9.8m/s2
Now, here are a few systems of units:
- Kg cm ms
- Kg cm s
- gm mm ms
- kg m s
- g cm s
- g cm us
- g mm s
- ton mm s
- slug ft s
- kg mm s
- g cm ms
- kg mm ms
To write down the measurement in the above different system of units and respectively need to mention the conversion factor.
PROCEDURE
The calculation is done for the measurements for 1 SI unit system and the same process is considered for all others:
|
SI unit (Kg, m, s) |
Conversion unit (gm, mm, ms) |
Conversion factor |
|
|
Mass |
1 |
1000 |
1000 |
|
Length |
1 |
1000 |
1000 |
|
Time |
1 |
1000 |
1000 |
Derived quantities are calculated they cannot be measured or assumed directly.
Force 1N
[Conversion factor = 1]
STRESS 1Pa
[Conversion factor = 10^-6]
ENERGY 1Nm
[Conversion factor = 10^3]
DENSITY 1Kg/m3
[Conversion factor = 10^-6]
YOUNG'S Modulus 210GPa
[Conversion factor = 10^3]
VELOCITY 56.33KMPH
[Conversion factor = 1]
GRAVITY 9.8m/s2
[Conversion factor = 10^-3]
Conversion for other SI units
DISCUSSION AND LEARNING OUTCOMES
- This challenge is got knowledge about SI unit and conversion unit in LS-Dyna.
- LS-Dyna doesn’t have a default system of units. User needs to input material properties and physical dimensions according to a consistent system of units as per their choice.