Hi all
I am working on a study project: the behaviour of a bone under different stresses. I use SolidWorks for this , which I have never used before, and I would like some indications. I would like to obtain the complete curve of bone deformation (linear part, plastic part and then up to the break) under different stresses such as: flexion, compression, shear, traction. I would also like to obtain the Young's modulus due to these different stresses, as well as the maximum stress at plastic deformation and fracture.
Thank you for your answers.
Hello
You mean the bone as a tibia, radius, or ulna!
If that's the case, then Solidworks doesn't know how to do it, for a good reason, it's that on the one hand the bones have a spongy structure and on the other hand the dimensions of the cells that make up the bone don't have the same dimensions everywhere. So impossible to reproduce with the current versions of SW.
In addition, there is a great variability from one individual to another and depending on age, morphology, etc.
To make the slightest approximation, it would be necessary to do generative topology, which solidworks does not yet know how to do.
You have to look at the bone densitometry but it indicates if the bone is normal or not, but does not predict the resistance to breakage when it is almost zero because it is the cartilages, etc... which act as shock absorbers.
Kind regards
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Hello
Thank you for your answer,
The modeling I found is a femur bone,
I thought that I could study the bone in a cortical way at first (i.e. hollow) and study its technical characteristics. Then in a 2nd step, I thought of making a mesh by finite element to reconstitute the spongy part of the bone.
Does this seem unfeasible to you?
If so, do you have any ideas or software to get the mechanical characteristics of a femur?
Kind regards
Good evening
Sorry to upset you, but it seems to me that you are making a very small error in reasoning and knowledge of the software
You say [Quote] I thought I made a finite element mesh to reconstitute the spongy part [/QUOTE]
A mesh starts from the existing material and does not create matter, so you cannot create material with the simulation module.
Occasionally, trying to understand what the mesh is for can be useful.
Admitting that you can make a tibia by cutting the anterior tibial tuberosity and that at the bottom you make a cut four centimeters above the tibial malleolus, you will not achieve what you want.
What for! Well, simply because the necessary reference system, namely Young's module and other parameters necessary for the parameterization of your material (the bone) do not exist to my knowledge.
The only way would be to recover a real bone and break it with the various instruments used in metrology. But here too, the usable values also refer to known materials and strictly calibrated specimens.
Unless my eminent colleagues and experts on this forum advise otherwise, I believe that you will be able to close this subject without having received a positive response to your request.
Kind regards
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Good evening
Thank you for your clarifications.
Do you know of any free access software that can simulate certain stresses on the OS? You seem to know your stuff.
Kind regards
Hello
No, I don't know of any freeware or very expensive ware that would do this, otherwise I would have told you at the beginning of the conversation.
The only hyper-very expensive ware I know of is the one used for anthropomorphic test devices (AEDs) or crash test dummies, colloquially referred to as phantoms. However, this is not about the bones but about all the stresses that the body undergoes through a multitude of sensors.
Kind regards
PS:
[start of off-topic]
Only to help you because contrary to what I told you, numbers exist (I didn't remember where I had seen them while they were under my nose) but are not easily usable under SW.
You have to look at the biomechanics of the bone and look at what already exists, this should give you some figures and especially the methods used which are more like reverse engineering (Since the original model dates from the Miocene )
[End of off-topic]
Edit: Spelling
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