Recent content by cabellos6

I know theoretically that friction is independent 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...

Thanks. Could i just ask is there any particular book/website you found these relationships from?

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.

thankyou very much. This seems to be exactly what i needed.

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...

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...

yes i am aware that when we divide by x this ODE is then in standard form. What i don't understand is how to show this equation has only one singular point?

Homework Statement For the ODE xy" + (2-x)y' + y = 0 i want to show it has one singular point and identify its nature Homework Equations The Attempt at a Solution I have read the topic and I see that a point Xo is called and ordinary point of the equation if both p(x) and...