Bending Definition and 633 Threads

OK I have no idea how to work this out. I've googled bending radius but it doesn't really help a great deal. It's the 2nd part of the last question: http://img535.imageshack.us/img535/4774/10579351.jpg There's nothing in my notes about it, but I guess it has something to do with how...

ok il say this now I am curious what would happen if you were able to bend the accretion disk and the ergosphere so that they bend passed the outer horizon and into the inner horizon were the singularity is located i know this is a 0.0000000000000000001 chance of happening but it would be a...

bending stress in beam, help me ! Homework Statement Homework Equations singularity function bending stress (max) = { (M max)/I } * ( a/2) The Attempt at a Solution after writing the singularity function, and compute reactions force I found that the maximum bending moment should be 12.04...

Homework Statement http://img80.imageshack.us/img80/4476/bendingshearquestion.jpg Homework Equations \sumM = 0: \sumFy = 0:The Attempt at a Solution Revising for my finals and going over questions, and would like to understand more clearly how to get the following. Solution is in the image...

I'm currently studying Agri. Mech. Eng but I need some help on this, I know roughly what to do but it's where to start: 1. Design a skimming boom for a biomass slurry transfer tank which can have a reach of 7.5m. Tool must attach to a "quick hitch" plate - factory spec for the loader is...

So I have a plate connected to a metal wall that is riveted to the wall with 5 rivets. This plate then has a ball joint connected to the one end which has a load of 460 Lbs. at a 21 degree angle. All the drawings have been attached. I need to prove that the plate will indeed bend under such...

Homework Statement Refer to the attachment provided Homework Equations Just taking force and moment equilibium of whatever component I choose. The Attempt at a Solution I assumed a uniform force distribution. Set the origin at the leftmost end. For 0< x < \frac{L-a}{2} The...

I guess it has been too long since i have had to use any math beyond arithmetic. I am working on fabricating some tube work, and these similar shapes keep coming up. I keep thinking i can calculate them out, but for some reason i always get stumped and feel like i am missing some information. I...

I'm working on a problem involving the bending of a beam. The bending is a result of an expansion within the beam, rather than an external load. Basically, there is an expansion in the volume of one side of the beam and a contraction on the other side. I have therefore calculated a...

Tungsten Filament bending and production! my machine produces filaments for a UV lightbulb, the filaments are basically tungsten coiled tightly around a tungsten shank, and the machine used to do this perfectly! however it was switched off for a about a year during development. but now when...

Homework Statement This isn't really a homework problem but something I...felt like figuring out. I'm an EE student, so this isn't rly my game, but I'm giving it a hack anyway. See the attachment for an outline of the problem. The attachment shows the top view of a beam connected rigidly...

I apologize for not using the template, but my question is more of a conceptual question than anything else. The only thing so far that confuses me with Shear and Bending Moment Diagrams is when, in some cases, it is easier to approach the beam from the right side instead of the left...

Hi, everyone. I was told that when a beam is short, L<=5H, the equation of "Stres=Moment*/2nd moment of initeria" is not valid (how). (where H = deapth of beam ; L is the location of F acting on that beam) Is that ture and is that relate to principle axis? Also if it is ture, why...

Homework Statement I have a 20' (240 inch) beam with supports at 0in., 80 in., 160 in., 240 in. I need to give the beam a rating (maximum load; capacity) since it is a monorail for a 3 ton hoist. I've asked the question to my prof (his work is attached). Homework Equations I...

Homework Statement The ski supports the 900N weight of a person. If the snow loading on its bottom surface is trapezoidal determine the intensity w (N/m). Draw the shear and bending moment diagrams for the ski. The ski has an overall length of 2m. The force arrows 'hang' of the bottom of...

Hi, I came across a piece of maths with which I am struggling to find info on. It has to do with the stress induces in a cylindrical shaped wire (nanowire to be precise). The article where the maths appear is attached. The specific problem is in equations 12 through 13. Thanks

I am new to this subject of topology. I want to know if bending and stretching of a manifold is same as a general transformation of a coordinate system drawn on the manifold. Or the mathematical definition of bending and stretching shall equally help.

Homework Statement The problem can be found here: Sorry the picture is so small. I guess you can download it and then zoom in or something. The main question I'm interested in 2b. Calculating the moment. position of neutral axis: 37.14mm Second moment of area: 2.83 x 10^(-6)Homework...

Ok. There are 2 universal beams. One is 500mm deep and the other one is 400mm deep. For both beams, the top and bottom flanges are 200mm wide x 10mm deep. [SPAN of the beams is not given] Questions is..If the maximum bending moment capacity of the 400mm deep universal beam is 200 kn.m. What...

I would like to know , given with the 2 attachments below, are there any ways to find the bending moment (as circled) of the bridge? or it is not possible to calculate simply because the "load" data is not given? Several attempts have been tried but the circled data can not be...

Can anyone point me to a good source using the Schwarzschild metric that gives Einsteins predicted result of the measurement in Principe?

Hello I hope you can help me and give me some guidance, hopefully I have posted this in the correct section of the forum. I need to calculate the moment on the attached drawing, and the loads then transferred to the base material, if it is shear, tensile or an oblique/combined load. some...

Homework Statement A steel strip of breadth 50 mm and depth 3 mm needs to be bent around a drum of diameter 4 m. What bending moment is required and what will be the maximum stress produced? The modulus of elasticity of the steel is 210 GPa Homework Equations \frac{M}{I}...

Stress/strain+general bending equation... Homework Statement A steel strip is to be bent around a drum of radius 1m. What is the maximum thickness of strip that can be bent in this way if the stress in the strip is not to exceed 100 MPa. The steel has a modulus of elasticity of 210 GPa...

Homework Statement A horizontal beam 8m long, resting on two supports 1.5m from each end (supports are 5m apart), carries a uniformly distributed load of 25kN/m between the supports, with concentrated loads of 20kN at the left end of the beam, 30kN at the right end, and 40kN in the centre...

Homework Statement Note the attachment. I scanned it out of my book and I drew a FBD on it. Homework Equations The Attempt at a Solution Ok so i haven't gotten very far at all with this one because it just doesn't seem to have enough information. So first I summed the forces...

Hi For a project I am doing i need to know the maximum load an "I" Beam made out of balsa wood can take. Looking through the internet I found the "Euler Buckling Formula" F = \frac{E I pi^2}{l^2} When I use this formula I get a load which is too big, and I think this mght not be the...

Homework Statement A steel (Young's modulus = 210x109N/mm2) propped cantilever beam (Figure 1) supports a uniformly distributed load (UDL) of 20kN/m. The beam cross section is a 150mm x 75mm x 8mm rectangular hollow section (RHS), i.e. 150mm deep, 75mm wide and has an 8mm wall thickness. The...

I need a piece of .125" steel sheet metal to be 21" wide after a 1" lip is bent to 90 degrees on one side. How wide does the initial piece of steel need to be before bending in order to achieve this? I know it will be more than 22", but how much more? If I recall its fairly simple to figure...

Can the bending of light because of gravity be derived from the Maxwell equations written in curved space time, i.e., \frac{1}{\sqrt{-g}}\partial_\mu(\sqrt{-g}F^{\mu\nu}})=0 In all the examples the bending of light is treated as a massless particle traveling on a light-like geodesic (if I...

The attachment shows a side section of a water tank.(lined with Marine Ply) The section will be bolted to a fixed bottom section with 4 bolts. I'm trying to determine the size and strength of bolts required to do this. My attempt at starting this problem is shown in the attachment...

Homework Statement Hi guys I've got a problem on hand which has haunted me for sometime and I thought it might be a good idea to post it here to ask for your opinions. As you can see in the picture, I've got a circular flange. What I am intending to do is to simply find out the...

I don't know how to do the following question, The beam shown is under the action of a uniformily distributed load w of 2 kN/m between the supports and a point load of 2 kN at the end point. Determine the bending moment in kNm at point A situated 3 m to the right of the left support. Round off...

Homework Statement I have a problem which involves me drawing the bending moment diagram for a trapezoidal distributed load. I understand the bending moment diagrams for a uniform distribution, and partially for a triangular distribution, however i am struggling to link the two for a...

Hi... I am doing a project to calculate the load required to bend a plate.. Here are the details.. There is steel plate of 2000mm width and 25mm thcikness placed over 02 support steel rollers of diameter 180mm. Another steel roller of same diameter press from the top of the plate at the...

Homework Statement My prof gave us this take home quiz to complete to prepare for our actual quiz. We are studying Shear force due to bending of beams (2nd year mech eng). In this question he told us that the shear force (V) can be applied at any of the points and that we would need to find the...

Hi guys, I'm doing a robotics project that requires me to compensate for the bending of the arm due to an end weight. I can calculate the deflection at the end of the arm for a given weight e.g. End link horizontal (90 degrees), end weight = 1000g, deflection = 10mm From this i can calculate...

Hello! There're very thin (4-15 nm) semiconductor films (passive film) formed on stainless steel by electrochemical method. In a electrochemical cell, I applied potential on stainless steel electrode to adjust Fermi level of the semiconductor passive film. I think that band bending take place...

Hello, I'm a newbie here, please help me to solve for the bending moment of my design airplane. I want to know if my wing spar is strong enough to support the weight of my design which is 490 lb. I want also to know if what is the breaking point of the wing spar. Please see the attached picture...

I'm not sure if this goes here, but there isn't a "General Science" section. Today I got a glass of really cold water, and noticed a candle on the table. I felt like collecting some carbon on the bottom and held the glass over the flame. The flame bent away from the bottom of the glass...

Hi all, I am designing a gear lever for a small race car, and am looking to validate my FEA of the lever through the use of hand calculations. The beam is not straight, and i have never tackled a problem like this before. I am using Roarks Formulas for Stresses and Strains, however am...

Hey I have this plate, and as you can see it has 4 bolt connections and no other. When applying the load bending will occur in the plate. I am interested in making the diameter of bolt as small as possible. My problem is though that I only can see the shear forces in the plate. How can I...

Although optical fibres do not break easily, is it possible to bend the optical fibre too much that light that travels within the optical fibre will strike the wall at less than the critical angle and thus escape from the fibre through the wall? Pls enlighten me. Thanks! (I came across this...

Why is the "bending" of waves related to wavelength? Hi! As stated in the title, my question concerns the "bending" of waves. (I'm quite sure that "bending" is not the proper term, so if you know the correct one, please tell me.) Let's say that we investigate waves in a ripple tank. We create...

There is a beam of width 10cm, and vertical reaction loads on each end (x1 = 0cm, x2 = 10cm). Starting from the left end of the beam, we have a vertical distributed load of 2,000 N/m spanning from 0cm to 5cm. Finally, we have a 1,000 N point load located 7.5cm from the left end of the beam...

when given a non homogeneous cross section, i know that i can find the bending(normal ) stresses by transforming the cross section into a homogeneous one by multiplying the area of one of the materials be 'n', where n=E1/E2, then i solve normally, finding the centroid of the new cross...

I'm trying to calculate the max load of a rack made of 3X3X1/4 steel tube. It is 8ft long and 4ft wide. I just want to calculate the max load (distributed load) in bending cross the 8ft and also in compression for the legs. i can't find the right formulas. can anyone help? so far i what i...

a question has been puzzling me for a while is : "is the distance traveled by a beam of light from point A to Point B in a flat space-time differs from the distance traveled by the same beam of light from the same point A and The Same point B but in a curved space-time ?" In other words ...

in a question i am solving, i am asked to plot the stress in a beam as a function of the moment, but as far as i know, or at least in all the other questions i have solved, i have been asked to plot the strains/stress as a function of my placement (y). could this be a mistake or is this a...

find the ratio of d/b such that the largest stress in the beam will be minimum i know that the maximum stress is σmax=Ymax\frac{M}{I} and i know that for a rectangle I=bh3/12 now in the question i am asked to find the ration of the (diameter of the log)/(the width of the rectangle) such...