Fibre Definition and 80 Threads

I was wondering if there was a definitive chart/data table with the properties of such a material. Many time has been spent looking through many papers, yet I am yet to find a table with for instance ... max tensile strength, max toughness, max conductivity I know there are many variations...

How Can i built carbon fibre parts at home work shop?

Question: An optical fibre is 1.0 metre long and has a diameter of 20micro-meter. Its ends are perpendicular to its axis. Its index of refraction is 1.30. What is the maximum number of reflections a light ray entering one end will make before it emerges from the other end? A) 18000 B)...

Hi, I need to find the stress taken up by the fibres in the longitudinal direction, when a load of 25kN is applied to a continuous aligned composite with the diameter of 2cm. 60% matirx with E=2.8Gpa and 40% glass fibre E=73Gpa. Attempt at solution Known values V_m = 0.6, E_m =...

Why is the traverse loading strength of continuous fibre reinforced composites weaker compared to the longitudinal strength? I sort of arrived at the conclusion, that since the composite is in an isostress state and due to the fibre having a very low tensile strength in the transverse...

HI ALL Well i want to know the power electronics required to transmit signals for sensors,limit switches ,push buttons up to PLC, and if analog device signals like potentiometer could be transmit tted with these ,how can i do this . i am using Plastic Optical Fibre and please help me with the...

i have a serious question for reducing the cables and cost of a machine i want to use optical fibre(OF) ,if we have approx.50 sensors,limit switches ,potenstiometers and vavles solenoids all together in one part of a machine can i convert the output of these to get a signal form or multiplexing...

Is the fibre optic cable cheaper than copper wire for transmission? I believe there is still loses in a fibre optic cable. As the critical angle of glass is 42 degrees, thus about 50% of the signal would be lost. Is that true?

any papers/ articles on carbon fibre?? hey I'm looking to do a study into the acoustic properties of carbon fibre but haven't been able to come across any current papers dealing specifically with this topic. does anyone know of any journals that have had published articles or better still...

I am not entirely sure where to post this, please tell me if anything needs to be changed This is my first post so i'll introduce myself... My name is Joe, currently aged 17 and in year 13 in school in Kent, Uk doing the International Baccalaureate (Not sure how well known this is? Quite...

Homework Statement For a continuous fibre reinforced polymer, use a diagram to explain how the Young's modulus of the composite varies with fibre orientation and fibre content. Anywhere i could get any of this information? I've been googling with no success for a while

Hi, I have a small question about exterior derivatives d on defined on principal bundles P. We have the Ehresmann connection on a principal bundle P, represented by a Lie-algebra valued one-form omega. We can use the section sigma to pull this one-form back to our basemanifold, where the...

Let's take a simple example. Both a cylinder and Möbius strip consist of a circle with a line segment associated with each point of the circle. The cylinder is considered truly equivalent to the direct product S1 X line segment while the Möbius strip is only locally like S1 X line segment...

Hi, I'm a little stuck on Nakahara's treatment about fibre bundles. I hope someone can give me a clear answer on this; they are quite elementary questions, I guess. We have: * A principal bundle P(M,G) * A fibre G_{p} at p= \pi(u) Then the vertical subspace V_{u}P is defined as a...

In the definition of fibre bundle we have a structure consist of (E, B,F, G, p, phi) E:total space B:base manifold = E/R where R is a relation p:projection map from E to B F: fibre G:lie group acting on F etc. the relation between E and B is obvious but i don't get connection between F...

I'm confused as to sources of dispersion in a fibre. Any clarification would be appreciated. Modal (Intermodal) dispersion: pulse spreading due to different group velocities of different modes in the fibre. Each mode has a slightly different n-effective hence the different Vg for each mode...

Is it difficult to make? as a complete beginner, what do I need to know, and am I way in over my head? :) any help would be appreciated.

Homework Statement "figure 3" (below) shows an optical fibre bent in a curve. The diameter of the fibre is 4mm. If light is not to escape, calculate the smallest radius of R of the curve round which the fibre can be bent. Assume that the fibre is surrounded by air (refractive index 1) and...

Hi, I was wondering, which spacetime model do you prefer for Newtonian dynamics? VI Arnold constructs it on an affine space \mathbb{A}^4 with an Euclidean space \mathbb{E}^3 defined on each time cross-section. The construction of time is somewhat cumbersome, involving defining \mathbb{R}^4 to...

Hi guys, can anyone help me with this question?- An optical fiber has a loss of 0.8dB/km at a wavelength of 1250nm. If 120uW of power is injected into the fibre at the transmitter, how much power would be lost at a distance of 20km down the fibre, also calculate the energy loss over a 24hr...

Chris Isham said (Modern Differential Geometry for Physicists) it's fairly easy to show that the pullback bundles of a (locally trivial) fibre bundle by two homotopic maps are isomorphic. But I haven't had a clue. Can somebody tell me how to prove?

Hi, this is my first post. Congratulations to a very interesting forum. The issue, I want to bring up, has probably been discussed already, but hopefully at least not in exactly the same way. I have read the book "Road to Reality" from Roger Penrose, which by the way I found quite interesting...

I try to understand the notion of connections on fibre bundles from the lecture notes http://arxiv.org/abs/math-ph/9902027" by George Svetlichny. On page 27 stands what the attached picture shows. (I don't know whether the attached picture will be visible, so I copy the text here: )...

I have bought a few wasabi plants recently, I have been trying to grind some of the stem of the wasabi into paste (as shown in the supermarket), the trouble I am having is gridingthe fibre down. First thing I tried is using a blender, it works fine on most part, but I just can't grind the...

I'm doing a presentation in this topic and I find it very hard to look for information on the web. Please, point me to any website or resources that have information about this topic? Thank You~! :confused:

Electrical and fibre optic... Why is it that a fibre optic cable must boosted less frequently than an electrical signal in a copper wire, I understand that there will be resistance in the wire and thus the voltage will drop the further you go, but surely there will still be the changes in...

Which foods contain a lot of fibre, or which foods are not digested? If you have an allergy to whole wheat bread and rice, what alternatives are there? Corn is not an option either, and I don't think salted sunflower seeds is a good option either :wink: How would potatoes do?

Carbon fibre is used in formula one cars to decrease load and increase aerodynamics. Is there a bearing which also works in a similar means ( re: light weight, as strong as current auto specs)?

fibre optic amplifier?? anyone heard of fibre optic amplifier before or not?

How cool is this!? http://www.cnn.com/2003/TECH/08/21/natural.fiberoptics.ap/index.html