Bending Definition and 633 Threads

Hi guys, For a Engineering Project, we will be suspending a bridge using a cantilever system. We have to draw the shear force diagram (SFD) and bending moment diagram (BMD) for the horizontal and vertical members. The arrows on the diagram represent the loading from the bridge itself. I...

At what mass does an object start to noticeably bend light?

For a physics research project I am doing the physics of note bending on the trumpet. Basically without pressing any valves I can bend a middle C to B natural. I am having problems finding any materials that talk about this except in passing mention. Such as, experimentally there are problems...

I know that the formula for the angle of bending of light around the star \theta \; in radians is: \theta \; = \frac{4GM}{rc^2} This is equal to full bending of light, half of which occurs on the rear side of the star and the other half occurring on the foreground side. So half of this...

Hi, I've got a little problem with a bending moment question. Here it is (really sorry for the bad diagram!) http://img474.imageshack.us/img474/7844/help15eu.jpg" R1 and R2 are reactional forces, which using moments I have calcualted to be: R1=110kN R2=141kN Section A of the...

I assume that the neutron is a particle with finite size and is <really> a single particle (that is that it does not have any further structure or components-like nucleus) and lastly it is electric nutral. I hope that these assumptions are close to the experimental observations. I am making life...

Does time-like curvature of spacetime cause light to bend, for example, around the sun? Or is the gravitational bending of light only due to the space-like curvature? So far, I understand the concepts as: Time-like curvature is caused by the mc^2 part of E, while space-like curvature is caused...

I need to understand how to work this type of problem before my final exam. How do you find the Maximum shear force and Maximum bending moment? Thanks

wasnt the fact that the sun bends light coming from distant stars proof that gravity warps space-time? I am sure I am wrong but can someone explain to me how they know it wasnt just refraction of the light as it passed the sun's "atmosphere"? Light bends around Earth due to our atmosphere and...

Ok We All Know That A Gravitational Feild Can Bend A Beam Of Light Now Can The Reverese Of This Be True? Can A Bent Beam Of Light Produce A Gravitational Field ?

A beam is under bending. Let us take a small part of a beam with length x. It has end A and end B. At end A the bending moment is M1 & shear force is S1 and at end B the bending moment is M2 & shear force is S2. Let me take the moment equilibrium for this element about B. M2-S2-M1+S1=0...

Hi I want to determine the bending load limit to elastic failure of extruded aluminium square section, 50 mm sq, warious wall thickness, 1, 2, 3, 4, 5 mm I thought I could get a good estimate from the tensile strength. I found a value of 90 Mpa for commercially pure aluminium but doubt...

In GR the bending of light around a Large Mass produces a Gravitational Lensing effect. I have a gedanken, I have a light source that has a finite 'ridgid' beam, a L.A.S.E.R beam. I point the beam into the night sky, at a location to the far West Horizon. I now proceed to arc the beam across...

How do you calculate the minimum bend radious for a tube? Its a SS tube and we want to bend as small a radius as possible...

Mechanics of Materials Bending Stress Problem Hi, I have a homework problem for mechanics of materials involving bending stress. Here is the exact wording: "Show that the maxiumum bending stress for a beam of rectangular cross-section is Omax = Mc/I [(2n + 1) / (3n)] if instead of...

Hello! I am looking a bit at the Schottky contacts, metal-semiconductor, and I am starting to get a hang of it, but some things are missing. Specifically: Why must the distance from the Fermi Energy to the vacuum level in the metal and the distance from conduction band edge to vacuum...

Hey-- I'm trying to model the bending of a beam due to electrostatic forces. (Femlab does offer this model on their website, but the module I'd need to run it costs $600!) I have no problem modeling a beam bending, and I have no problem creating a parallel plate capacitor, but when I...

Bending a laser beam ?! I was surfing the web when I encountered this photo: http://www.ieav.cta.br/soldagem/LASER%20verde.gif I can only read English and Persian, unfortunately the page was in another language I can't get even a word of it. Anyway I'm badly interested to know a bit...

i have a circular tube of diameter 20mm,thickness 1mm and length 500 metres i bend the tube into a radius of 50mm. obviously the tube has entered the plastic stage. But what would have happened to the material properties. hOW CAN I CALCULATE THE CHANGE IN MATERIAL PROPERTIES. THE...

Light always wants to travel in a straight line, however, the space is curved around massive objects such as black holes, so it would seem as if the light was being bent as it traveled around the black hole. The space around the Earth is curved.. so satellies traveling along parallel paths can...

how do we say that in a beam bending problem the bean cross section bends(rotates)around the centroidal axis. Why not about any other axis?

Hi, this may seem like a really easy simple question, but I've not yet managed to figure it out. Yesterday I was looking through the encarta and I came across 'Relativity' so I started reading about it, on one of the demos it said; 'When Sara is standing still in space she switches on a torch...

Mar 29 (from my journal site) "What we know. The force of gravity is much greater here on the face of the Earth opposed to the far upper atmosphere of our planet. Yet it is around a planet that we typically observe and associate with the bending of light. Here on the face of the Earth it...

If i have a simply supported J Section beam, when I'm calculating the max deflection, what value of I do i use? I have already had to calculate Ix, Iy and Ixy. I would imagine that as deflection occurs along the y-axis that i would use Iy. Or do i use Imin? I have already calculated...

The equivalence principle (EP) - which is the basis of general relativity – states that you cannot distinguish between an object’s behaviour in a uniform gravitational field from that in a uniformly accelerating frame. If light travels vertically in a gravity field it loses or gains energy, and...

Hi, I need to work out the bending moment of a steel tube, 25mm diameter (3mm thick) 410mm long. im assuming i have to use youngs modulus in some way? what's the correct formula for working out when it will bend? thanks chris

Hi, I need to work out the bending moment of a steel tube, 25mm diameter (3mm thick) 410mm long. im assuming i have to use youngs modulus in some way? what's the correct formula for working out when it will bend? thanks chris

In a table of different steel qualities the information about a perticular type of steel can be as follows: Steel type: S235 Tension/Pressure: 0\pm60 130\pm130 Bending: 0\pm190 150\pm150 My question is, what do these values tell me? The values are in N/mm^2

How can concentrations of mass (such as the Earth) or energy bend space and time? I mean, is there any theory that states what causes space-time to be bent by these large masses? Aren't space and time just abstract concepts, so how can they be bend?

Is a well studied problem. I am a textiles engineer and am doing some work on modelling the interaction of the yarn with a brush ring (circular brush with hairs slowing the yarn down). You can easily calculate the deformation of a hair caused by a force perpendicular to the curve of the hair in...

i know that gravity can bend light so from this principle i have two theoretical questions. first, can light bend around an object to the extent that the object becomes invisible? basically what i am thinking is that a beam of light coming form behind it will bend around the side and exit the...

In the terms of rotational inertia why is it hard to walk without bending your knees? The greater the bulk of the object mass to its axis the greater its rotational inertia. how can I relate that to walking without bending knees? I understand that with rotational inertia an object...

Has anyone here ever been tree bending?