I know theoretically that friction is independant of contact area. However, i have a cylinder which i want to clamp via two jaws. My thinking is that a v jaw, clamping at four points around the circumference of the cylinder would be more effective than a curved jaw design??
Thoughts would be...
In a two stage reduction gearbox is it possible to have more teeth on the gear pair (helical-parallel axis) of the 2nd stage? I ran through a specification for gear sizes and I am wondering if this is ok.
For an industrial parallel axis gearbox with a transmission ratio 10:1, what is the reasoning behind the use of 2 stages rather than a single stage?
The one I can think of is the reduction in size of the gears using 2-stage as opposed to a single stage, thus reducing costs.
Are there any...
rectangular plate bending...
I am designing an endplate for a spinal disc implant as shown in the image below.
http://img155.imageshack.us/my.php?i...ndplatenb5.jpg"
I need to determine a suitable thickness of plate h. I thought about looking into winkler foundations to begin with but i...
I just found on another forum the winkler modulus can be estimated by the following expression:
k = E*(1/B+1/L+1/h)
where E is the youngs modulus of foundation, B is width of strip, L is the length of strip and h is the limit depth (of soil in this case)
How could i estimate my limit...
Just had a browse through some journals and came across this http://www3.interscience.wiley.com/cgi-bin/fulltext/109927764/PDFSTART"
On page 4 it talks about the value of K. I am not sure whether this 5.8 is a general approximated value for bone?
Winkler foundation modulus...?
I need to find the Winkler foundation modulus of bone. Does anyone know this or know of a means to calculate this?
Thankyou.
As part of my project (designing an artificial spinal disc) I have to design the enplate pieces which will attach to the bone.
I am familiar with beam theory with regards to simple supports or cantilever beams but i have not yet studied beams on elastic foundation. I would be extremely...
A beam/plate on elastic foundation...
As part of my project (designing an artificial spinal disc) I have to design the enplate pieces which will attach to the bone.
I am familiar with beam theory with regards to simple supports or cantilever beams but i have not yet studied beams on elastic...
I am designing a spinal disc with 2 metal endplates. These endplates are rectangular in shape and are fixed to form a flat contact surface with the vertebrae bone surface.
My question is based on the bending stress of these metal endplates. I need to work out the possible thickness of these...
I am designing a spinal disc with 2 metal endplates. These endplates are rectangular in shape and are fixed to form a flat contact surface with the vertebrae bone surface.
My question is based on the bending stress of these metal endplates. I need to work out the possible thickness of these...
The two upper and lower endplates with ball and socket arrangment form the 'disc'. I need to do some calculations to gain an idea for an appropriate thickness of endplate. I am beginning to think beam bending is not appropriate in this case then as the top endplate is not fixed (e.g it can't be...
http://img341.imageshack.us/my.php?image=endplateballsocketij7.jpg"
I am designing the appropriate size of an upper endplate for a spinal disc and was wondering what would be the best way to calculate bending stress in this design. The image is shown in the link above. It is a ball and socket...