Axial Definition and 195 Threads

Homework Statement Hello, I have an experimental problem that I don´t know how to express theoretically. It consists on a tip at high voltage inside an earthed cylinder, where a discharge is produced. The discharge is radial, since is the shortest distance to the wall, and produces ions, which...

hi, does anyone know how to find how much axial pre-compression is required so that buckling will occur after a temperature rise of 50 C°? I know the cross section of the pinned at each end copper strip (4mm x 8mm) length= 100mm E= 100 GN/m^2 Coefficient of thermal expansion is 18 x 10^-6

HI, i am a student taking final year project in my university, my project title was C++ modelling of axial turbocharger, it was a counter-rotating turbocharger, can anyone help me to get some useful information to complete my project? thanks

Let's say I have a precisely designed axial compressor, comprising of stages of rotor and stator wheels, that resembles something like this: Such a compressor, driven by a certain torque at a certain RPM, will deliver a certain air mass per time at a certain pressure. Now, what happens...

If I rotate an object about an arbitrary axis, I can draw an arrow along that axis, and assign it a length proportional to the amount of rotation. I can project that arrow onto the basis of a rectangular coordinate system. The question arises, is it a vector? I can certainly transform it...

hello My question is rather off the usual queries concerning beams, which is maybe why I'm struggling to find a solution. If we suspend a totally rigid beam at its extremities with springs to measure forces, the springs will both indicate q x L /2. If the beam is supple, it will sag and...

Hello, When we use slope deflection method in frames we neglect axial deformation in order to get the same delta when the frame is sway,(that what i understood) So i have two questions 1. Neglecting axial deformation means ignoring axial force??Or what?? 2. How to neglect axial...

Homework Statement I have a Mohr-Coulomb plasticity model with isotropic hardening on the cohesion c(k). The angle of internal friction is constant. k=sqrt((2/3)*(de)'Q*de), where de is the time derivative of the plastic strain. Q is diag[1,1,1,0.5,0.5,0.5]. It is a triaxial test assuming...

Hey everyone. I've been working on a axial flux permanent magnet DC generator to use on a 100W wind turbine(small I know), to charge 12v batteries in low wind speed areas. Now that it's complete, I'd like to determine the full power curve at different rpms. So far I've been running it on NO...

Hey everyone. I've been working on a axial flux permanent magnet DC generator to use on a 100W wind turbine(small I know), to charge 12v batteries in low wind speed areas. Now that it's complete, I'd like to determine the full power curve at different rpms. So far I've been running it on NO...

Hi I have been searching the relevant literature but I cannot find if an ion traveling through a quadruple TOF MS will obtain an axial motion and frequency as a result? and will this axial motion induce a corresponding frequency on the HV rods that could be measured with the right filter...

https://dl.dropbox.com/u/73421703/b1.jpg hi there , I'm asking for help with this one! I should solve that problam through energy method. Given single force Q(not shown in the picture) on the edge of the cantilever(the right-end of the beam), what I'm looking for - The critical P(axial force)...

If anyone Have a Process Of Design Or any Designed Axial compressor can help me in my project ...cuz I have a Graduation project Of Design Axial compressor and I need Your Help pleasezzzzzzzzzzzzzzzzzz :)

I often hear that for planet to have life on it it must have proportionaly large moon to keep it's axial tilt small like Earth is between 21.5° to 24.5° and not like Mars that varies from 15° to 35° which makes destructive effect on possible life that could flourish. But doesn't Venus have...

The degree of the Earth's axis has changed throughout history. If I am not mistaken, I believe that people can make very accurate estimates about the historic degrees of the Earth's axial tilt. If this is the case, then I would like ask some questions 1. What was the degree of the...

Please teach me this: We know that orbit angular momentum is the product of coordinate operator vector and momentum operator,so when we reflect the coordinate system the angular momentum is unchanging(axial vector).But I do not understand why spin vector is axial vector. Thank you very much in...

Homework Statement A solid cylindrical bar 18.34 mm diameter and 180 mm long is welded to a hollow tube 18.34 mm internal diameter and 120 mm long to make a compound bar. Determine the external diameter of the tube in (mm) if when loaded with an axial force of 40 kN, the stress in the solid...

I had a look at Jackiws article on axial anomaly in scholarpedia: http://www.scholarpedia.org/article/Axial_anomaly Apparently, axial anomaly also breaks Lorentz invariance. Even if this effect would be very weak, doesn't this pull the plug on relativity?

Hello all! I just want to ask help from you guys, I am trying to select which fan would apply on my toy project, ok, here is my setup, I have a base, and on it is a fan and on top of that is a tube, like a duct, and what I am trying to see is what kind of fan i can use to ascend or make a...

Hi, Could someone explain to me how to split SU(2) into its axial and vector subgroups, what does this mean? (The context I'm trying to understand this in is the U(2)_L x U(2)_R global flavour sym of chiral Lagrangian) A related question: I know that the three axial generators of SU(2)_L x...

How do (offshell) QCD ward identities look like in the axial gauge? How to derive them? The standard treatment of ward identities uses BRST symmetry in the covariant gauge. I don't know where I can read about the axial gauge version of the ward identities.

I'm studying Bondi's work on gravitational radiation. He applied axial symmetry and reflection symmetry to a source of gravity. How is it that axial symmetry does not automatically imply reflection symmetry? The assumption for axial symmetry is \phi \rightarrow \phi'= \phi + constant The...

Hi physics forum, I have been reading David Griffith's book "intro to elementary particles" and he describes the decay of the pi-meson as "pure axial vector" Can someone tell me what this means, in terms of the weak force vertex consisting of this factor γu(1-γ5) Thanks, Mark

A steel bar that is 16mm in diameter is resisting a force of 25kN. What is the normal axial stress in the bar(MPa) Since MPa = N sqmm would it be 25kn/(0.016m x 0.016m) Im more after the process on how to get the answer than the answer itself.

Find the electric potential for an axial quadrupole: point charges q, -2q, q over the z axis at distances l,0,l from the origin. Find the electric potential only for distances r>>l and demonstrate that the potential is proportional to one of the zonal armonics. Well, I found at wikipedia that...

Homework Statement Hi Say I have a spring system as in the attached figure (it is in equilibrium). I am a little confused about the "axial force" concept after reading an example in my book. It goes as follows: "We have the three springs, where the outer most ones are attached to a wall...

Homework Statement Consider an infinite thin flat plate with a 1m chord at an angle of attack of 10 degrees in a super sonic flow. Describe the angle theta between the Lift and Normal Force, is it the same as the Drag and Axial? Homework Equations L=Ncos(a)-Asin(a) D=Nsin(a)+Acos(a)...

why is angular displacement considered an axial vector only for small values?

Disclaimer: I'm not a physicist nor do I know calculus, but I'd appreciate a little guidance with a concept I've been thinking about. I know one would usually pay for this kind of advice, but since it's just for entertainment, I'm not asking for any equations to be solved, unless you're in the...

hi, i need to calculate the killing vector fields for axial symmetry for a project so i can study the galaxy rotation curves. i am assuming the galaxy to be a flat disk, in addition to being axially symmetric. so i figured that the killing vector fields with respect to which the metric...

Homework Statement hi, I'm new to this and am trying to understand axial stress. here's the question I've been given: "consider the 250mm x 250mm concrete-encased steel column, shown above (picture a square with an H-shaped steel beam in it). the steel section is W150 x 22, with Es =...

I have to calculate the elongation of a pencil under a load. I know I have to use deflection = PL/AE but since the pencil has 2 materials in it I have to modify that equation. I know that both materials extend by the same amount. Could anyone explain to me how to get that equation?

Hi all. I discovered a thing the other day that I've known for a long time but never really thought about. If power distribution is shifted towards the bottom of the core the xenon concentration is shifted towards the top of the core. This is equilibrium conditions, i.e. only very small...

Does axial force exist in a member of a structure where no force acts parallel to the member?

I've attached the question. I'm not looking for solution just general guidance on how to tackle the question. Do I calculate the internal forces? Where do I put the live load, at node 3 or the midspan of 2 and 3?

if a free-free bar has a crack located somewhere along it's length, in order to find the natural frequency of the bar do you split the bar on either side of the crack and assume each bar is free/excited? What would the equation for natural frequency be in this situation?

Reflection at a surface takes place under the condition that the field amplitude is zero at the reflecting surface. As a result, the axial modes i of wavelength λi inside a laser cavity can be defined by their number ni of sine-wave half cycles that fit exactly into the laser cavity. The optical...

Hey Guys, here is a skeleton for an exercise I need a help with: In this Problem we have a beam EF which is pin-supported at E, a Rod CD which is enrolled by a spring ( spring constant =k) and a rod AB (AB is touching the ground, I forgot to draw it). If we heat the Rod AB what will...

Hi! I have a process with multiple feynman diagrams where gluon propagators occur. When I use an axial gauge for the gluon propagator, do I have to use the same n-vector for every propagator? Following this I wonder whether I can use the same n-vector for every polarization sum in axial gauge...

I am building an axial flux generator with dual rotor and single stator. I was doing calculations and have a magnet pole pair question i need help with, there are 12 magnets on each rotor with North pole on one rotor across from South pole on the other rotor. Since there are 24 total magnets...

Hi Physics Forums! I would like to know how to model a thin, infinitely-long circular cylinder moving axially at hypersonic speeds. For something I would expect to be a base case in most hypersonics textbooks, it's surprisingly difficult to find a straight answer. In particular what is...

Axial loading problem?? Im taking a strength and materials class and i can't seem to do this problem. it would be awesome if someone could walk me through how to solve it. i have a link that shows the picture. Just some information you might need: Modulus of Elasticity (E) of brass c83400...

Hello, I design high powered rockets in our Tripoli rocket club. A particular plastic type of tube used is the Quantum 3.9 in dia plastic (sewer pipe) it is a thin wall design. http://www.publicmissiles.com/ They state that this basic tube is good for just .86 mach for compression loads...

I have a motor driving a gearbox. I had DE bearing of the gearbox replaced recently as pitting in the inner race was found. Before re coupling the two units, I had the motor vibration checked and found to have satisfactory vibration levels in horizontal, vertical and axial directions. After the...

We are trying to improve the efficiency of a fan for an engineering project. However, we first need to figure out what the efficiency of the fan is now. Since we know how many watts the fans motor is using at each setting, we figured we could just find how much power is in the air the fan is...

I'm having trouble with understanding how to calculate a wall thickness change in a hollow cylinder unde axial loading. The length, outside diameter and initial wall thickness are given as well as the size of the load, Young's modulus and Poisson's ratio. I guess this isn't really a hard...

Homework Statement [PLAIN]http://img826.imageshack.us/img826/8600/217yf.jpg The attempt at a solution This is my work for part (a): \delta = \frac{PL}{AE} \delta = \frac{(6*10^3 N)(0.4 m)}{(70*10^9 Pa)(\frac{\pi}{4})(0.02^2 m)} \delta = 0.1091 mm However, the solution for...

Homework Statement A cylindrical pressure vessel with closed ends, internal radius of 0.4 m and a wall thickness of 10 mm is to be subjected to a combination of internal pressure and an external axial tensile force of magnitude 50 kN while in service. The external axial force is applied...

Homework Statement I am trying to determine the deformation of a beam loaded as shown in the attached picture. where: P=30kN L=1m A=0.000225m^2 E=2.22*10^5MPa v=0.31 I=4.21875*10^9m^4 Homework Equations Pcr=pi^2*EI/L =9.2435kN where Pcr is the critical load The Attempt at a...

Let us consider a rectangular plate moving horizontally in a vertical magnetic field with its length perpendicular to its direction of motion.This may be closely approximated by the wing of a flying aircraft.The axial emf is given by the traditional formula, E=BLV. Now when the...