Bending Definition and 665 Threads

Homework Statement For the beam and loading, draw the shear and bending moment diagrams. Find the max and min abs vals of shear and bending moment. += pointing upwards, - = pointing downwards The beam is 1.4m long. Load A = -.54kN at x=0, Load B= pin support at x=.2m (Found to be +1.8kN)...

Homework Statement A railway bridge of 80ft span with two tracks is supported by two main steel girders of I-section. The girders are 7ft deep between the centers of the flanges. If the dead weight of the structure between the abutments is 200 tons and the weight of each train of carriages is...

Hi, I have the equation: f/y=M/I And y = d/2; I = bd^3/13 However i have been trying for ages to try and get this equation in terms of d. Can anyone help me/ give advice as to how? Thanks

Hi I need help for this structure. It is loaded as shown - point E and G is wheels added as free bearings. I need to know the bending in Beam AD and also EF. I tried isolating beam AD and see it as an statically inderteminant beam to the second degree - but i am not sure this is the right...

Homework Statement I have no idea how they are getting this value for Mcritical R1 and R2 are 7.5 kip and 2.5 kip, respectively. My bending diagram shows that the max moment should be (12+6)"(7.5 kip)= 135 kip-in What on Earth are they doing?

Hi Everyone, First post here. I'm a 37 year old man who has just recently begun dabbling in the basics of Physics, purely for the academic enjoyment of making by brain go "ow!". Upon reading the "bowling ball on a bed sheet" description of how the gravity of large objects can bend the...

Hello everyone, first of all, english isn't my native language, so please excuse any spelling-mistakes during this post. secondly, i am very much new to the world of physics in general, but getting more and more interested by the whole concept of general relativity and quantum physics...

The reason I heard that black holes are black is because any light that trying to leave the black hole's gravity gets sucked in by the massive amounts of gravity. So this implies that light can curve or even reverse direction if enough gravity is present. If this is the case then what stops a...

What exactly is bending of space? Does space bend from position x to position y? If so, what do we call whatever is there in position x (after the bend)? And what was there at position y, before the bend?

General relativity tells us that space-time bends. In what direction does/can 3D space bend? If its bending is non-directional, in what sense does it bend? Can you suggest any analogies that would help student's understand this phenominon as they learn relativity?

Homework Statement http://www.apeg.bc.ca/reg/past-exams/documents/May2005-98-BS-6.PDF Page 3 - Question 2 Except that let M=60 N.m (instead of 75) Homework Equations Transformation Equations: Z = z * E / E(ref) The Attempt at a Solution Transforming the composite bar to a...

.I have just solved a problem where a uniform beam without any load is embedded in concrete at either end. In this type of problem there is a moment of force at each end acting to keep the beam horizontal i.e the concrete at each end prevents the beam in its immediate neighbourhood from...

How to deal with non uniform cross section bending? How does one approach a solution for bending of a shaft having multiple diameters. I have one particular shaft in mind that has 11 diameters to get to the midpoint. I know the deflection at the midpoint, and I would like to calculate...

Homework Statement Please refer to the uploaded images. (there are two images) When the right of the weight is lifted up, I need to know the formula to calculate the bending moment of the beam according to the rest of parts I have and how to calculate the suitable size of the beam to be...

Hi all, i am doing a mechnaical HNC and have some questions i need to expand on. I am asked to "Define the following in terms of bending theory" and i am strugling to find information in the depth i need. Neutral axis: all i know about this is it is a cross section of a beam perpendicular...

Homework Statement I want to find the euler buckling for a open I beam( middle section like a box) that is subjected to three point bending with a point load on top. I am not so interest in a solution but explanation on how this could be worked out using the euler equation for buckling...

Homework Statement This all about Bending reaction. The problem that I don't understand is how to created this formula "See this symbol '??' in the picture. I have to check the modified of this formula so the result will be same as likes the symbol. Why is the reaction of it be like that??

I would appreciate it if some one could help me with this. I read from Timoshenko's book Theory of Elasticity that for prismatical beam bending (uniaxial), the assumption is \sigma_x>>\sigma_z,\sigma_y=0 where \sigma_x is stress in the direction parallel to the deflection curve. And for...

I was wondering how the trick where a stream of water is bent with a statically chared comb works. See here: http://chemistry.about.com/od/chemistryexperiments/ht/bendwater.htm" if you don't know what I'm talking about. Will this work on all water, or does it have something to do with the...

Hi! There is a thermodynamics problem which I seem to be able to understand, yet unable to solve. If someone can me with it I would appreciate it. Homework Statement A Bi-metallic strip is straight at T= T0. It curves as it is heated up due to unequal expansion of two metals. The strip is...

I was wondering if it was possible to bend a beam of light with a magnet. If this is possible could someone tell me what the requirements for the magnet be to do such a thing.

Homework Statement The cross-section of an idealised I section beam has overall dimensions 12mm x 240mm deep. If the web and Flange are both 25mm Thick, determine the second moment of area of the section. If the maximum bending stress is limited to 100MN/m2, determine the maximum bending...

The question. A beam with a solid square cross section of 200mm x 200mm with a length of 30m is simply supported at both ends. Weight of beam = 10kn/m. The beam has a UDL of 120KN which lies between 8m and 20m from the left hand side. I am fairly new to this so please bear with me. I...

Homework Statement This is a two part question. In the first part you are asked to determine the mam moment that can be applied to the beam if it is bent about the z axis. They then ask you to redo the question bending about the y axis. This is probably a really simple question but what is the...

Homework Statement Fixed end beam with Length = 1m Load 1 = 58.86n @ 0.4m from A Load 2 = 39.24n @ 0.85m from A Find Ma, Mb, Ra, Rb Homework Equations Not Sure, where help is needed The Attempt at a Solution Well i think, almost sure from 2 methods that Ra = 40.52511...

I have been trying to analyze the deflection of the free end of a cantilevered beam with a point load P at the end. The trick is, the beam is supported underneath by a surface described by the arbitrary function g(x). So let's say that g(x)= 0.001*x^2, a very shallow parabola. As the beam...

So here's a crazy question...I was trying to think it through and have come up with nothing. Is it possible to bend a laser beam's cross section? For instance, if you are using a diode bar (which has a beam cross section resembling a line) is there a simple way to bend it into a...

Hello, Reading a news on Yahoo, I was asking myself a little question. I assume there are today extensive data about galaxies rotation as well as light bending by the same galaxies. The question is: how consistent are these data? The rotation curve of a galaxy is known to be flatter than...

Hi. I've been given this to calculate the support reactions but I'm not sure how to handle the increasing udl. And how would this be shown on a Bending moment and shear force diagram?? Also with non increasing Udl's when calculating the reaction is it best to change the udl to one force...

Homework Statement A beam of lengh is supported in a clamp system. distance between clamp is 1m. Loads applied at 250mm and 750mm. strain gauge fitted at 175mm with 100ohm resistance. Weight is applied at points a and b. Homework Equations Dont know? The Attempt at a Solution I...

Homework Statement http://imagebin.ca/img/uzuDsi.jpg and by maximum it means in magnitude Homework Equations I figured the best (easiest/quickest) method would be to draw the shear force diagram. When I originally did this problem I came up with equations for M and V by dividing...

Hi sorry I am rather new to all this but I was woundering if I could get some help? Im currently studdying for my Uni's resits over the summer which fall in just a few weeks time. Iv started to go through some of the old past pappers and I've got stuck on the same bit over and over again...

Homework Statement How is it possible to find the modified growth direction of a tree branch? And after this new vector is computed how should the next one be computed (the next segment growing from the last position)? The objective of all this is to program and produce a tree which is...

Homework Statement what is the bending moment formula? is it related to the pure bending formula? what's that? Homework Equations The Attempt at a Solution is the formula 1/p=M/EI?

Can anyone explain in words (or equations if you can't use words, or in words to describe the equations) how "...according to the theory [of gen relativity], half of this deflection [of light by any massive body, the sun in this quote's case] is produced by the Newtonian field of attraction of...

Homework Statement Given an iron bar, of round cross-section, fixed by its extremities (bar measures 152 mm in length and 4.8 mm in diameter), a weight of 88.5 kgs is hung from its middle, bending it at least 90 degrees. How much weight/force would be needed to bend another bar of...

If I were to bend a cantilever by applying a certain amount of force at one end, would the distance it bends in a circle be linearly related to the torque resulting from the force? If not, would there be a measurable difference from being linear if I were to bend a, say, 0.5m long object with...

Hello, not too sure if this is the right section but i do remeber reading it in a book about astrophysics and cosmology. The reason I am asking is that a can't find where i read it. It said something like light bends slightly due to gravity or something like that. There was a man in a...

!kindly look at the attachment to better understand! I have a project which has this configuration of two 5" dia double E.H,25 ft long pipe separated by a web vertically of dimension 1x2x25 inches also simply supported at the ends. If you could visualize by rotating the below thing by 90...

If you have two beams, not attatched to each other, placed on top of each other in 3 point bending simply supported, what do you do to find the first moment of area and moment inertia of the two beams. Thanks

Does gravity function as a lens, a prism or both?

Beam Deflection I am trying to calculate beam deflection for a number of points? I know the formula for maximum deflection, but i need to calculate the deflection when. Lengh = 1m Possition 1 = 0.5m Possition 2 = 0.75m - I apply a weight to possition one, and need to measure...

I have to design a lap fillet weld joining a plate to the top flange of an beam. There will be a force acting down on the plate so the weld will be bending. How do I calculate the stress on the weld? l l <- Forces acting on the plate and beam ----------------- The...

!Help Please! Bending (stuck) Homework Statement Homework Equations \sigma_{max}=\frac{Mc}{I} The Attempt at a Solution I am not sure where I am messing this up. I am pretty I found I correctly to be 140.144. But I think I am using the wrong internal force. I am...

Are there other observations for the bending of light apart from Eddington 1919...i want to know that whether bending of light is observed by other astronomers other than Eddington since this is a vital proof of general relativity...

Homework Statement http://img150.imageshack.us/img150/756/17311663go9.jpg The Attempt at a Solution I wasn't 100% sure whether this should be here or in the Engineering section, hopefully I've got it right. Anyway, I'm fairly unfamiliar with this type of problem and basically I'm just...

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 have the following problem and i have worked out the resultant forces that say A=397.8kN while B is 367.4 kN and the force of the UDL is 748.2kN. i have worked out the shear force diagram but am lost as to how to draw the bending moment for this problem any help would be appreicated. thank you

[SOLVED] Bending spaghetti I ran into a very interesting phenomen. When bending spaghetti, it always breaks into three or more pieces. By bending it, you can't break a piece of spaghetti into two pieces (note: bending from both ends or one end stationary). I heard that there is a mathematical...

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...