How to calculate Range of Motion of human lumbar spine in FEA?

More Khar Chun Lee's questions See All

Abaqus - How to set multiple properties in a material property?

Hi all, I am new to Abaqus and currently are learning to model a human spine. However, I faced trouble in setting up material. Does anybody know how to set up the material in the picture...

02 March 2019 5,289 4 View

How to model ligaments in Abaqus?

Hi everyone, I already have an assembly CAE for the lumbar spine model. However, my project needs me to model out facet capsular ligament for future study. Basically what I need to do is model...

01 February 2019 4,456 4 View

Is there a powerful system for the security of the systems distributed on IoT systems?

02 March 2021 3,858 10 View

How Relativistic effects is one reason for lanthanide contraction?

The Lanthanide contraction which is the decrease in ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, is due to poor shielding of the 4f...

01 March 2021 2,272 4 View

Is there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 View

For modelling epoxy-based matrices (in composites), which model in ABAQUS is the most suitable, Concrete damaged plasticity or Drucker-Prager model?

I am working on developing a micromechanical FE model for predicting kink-band formation in UD composites. To model matrix plasticity, which model, out of Concrete Damaged Plasticity and...

28 February 2021 5,415 1 View

What could be reason for getting such type of graph for complex impedance in case of polymer blend films?

Its effect appears in real part of ac conductivity also. Can anyone suggest any reason behind it?

26 February 2021 3,487 3 View

Can anyone share his experience regards Smoothing in origin?

I am working on TiO2 composite material and the results of XRD have a lot of small/junk peaks and while I apply a smooth filter in Origin then the other characteristics peaks disappear so anyone...

26 February 2021 8,183 3 View

How to calculate battery consumption for IoT device?

Hi, everyone I'm working on a privacy-preserving algorithm that will apply to IoT devices. So, I need to measure the power consumption by implementing this algorithm. Any suggestion, advice,...

25 February 2021 8,749 6 View

How vulnerable is water and wastewater infrastructure to cyber terrorism in an age of IoT?

Im looking for any papers, reports,articles, links etc on information on How vulnerable is water and wastewater infrastructure to cyber terrorism in an age of IoT.

24 February 2021 2,750 4 View

How to constrain genetic algorithm input u?

My real system (buck converter) can only take an input of 0 to 1 (duty ratio) and I need to constrain the system so the controller action keeps within this bounds. How can I do this? The code for...

22 February 2021 2,125 3 View

Resistivity of PVD TiNx thin films vs. N2 flow?

In the PVD of TiN thin films (~100A), I've found the resistivity of the TiN films dropped from ~100 to 60um*cm with N2 flow increasing up to the metallic mode ending point; then the resistivity...

21 February 2021 1,864 2 View

Aaron Gee

Hi Khar,

What you need to do is track two nodes on each vertebrae. For flexion and extension the points will be on the sagittal plane and for torsion and lateral bending it will be on the transverse plane.

The 2 nodes on each of the vertebra form a line that you use to measure the angle. Abaqus has some tools that allow you to create custom formula to operate on your outputs. However if you are not experienced with this you can export the deformed coordinates of the nodes and calculate the angles externally using another program such as Matlab or even excel.

Alternatively you can take screenshots of the nodes highlighted and use a program such as imageJ to calculate the angles visually. However, I do not recommend this as the angles will not be exact due to image perspective and error due to manual measurements.

Aaron

Khar Chun Lee

Aaron Gee Thanks a lot for your help!!!