Bending Definition and 633 Threads

a motor vehicle has a wheel base of 3m. four posta ramp with two wheels each side. ramps front wheels have 6kn and rear 8kn. determine the reaction of the supports on the beam? vehicle is raised 2.25 m vertically this is done in 45 seconds calculate power of electric motor required use...

Dear Experts, I am a gradute engineer posting here for the first time. I have a query regarding the simple problem to which i cannot seem to get the correct Max bending moment. Here is the problem. A beam of length L rigidly clamped at both ends with a point load F in the centre, i.e, at...

I'm using FEA to simulate an in plane bending moment on a plate. The moment is 200Nm, and the plate is 80mm tall. Do I simulate the forces on the edge in situation (a) or situation (b)? It's a seemingly simple question, but people have put doubt in my head, I hoped a fresh mind might...

Homework Statement I have to find the Shear Force and Bending Moment diagrams for this problem. The lengths in the picture are 1.2m each and the peak force is 4kN/m and I calculated the support reactions to be: Ay=4,8kN (up) Ma= 5.76kN.m (anticlockwise) Homework Equations These are what I'm...

Homework Statement Hi there all, I am designing a pedal box for a vehicle, and its adjustment is does by removing some pit-pins and sliding the pedal box along a rail and reinserting the pins. I need to calculate the stresses in the pin given a 600N total load applied by the feet of the...

Ok, I am fairly comfortable with beam bending equations for simple rectangles. However, I am totally confused on how to approach other cross sections... like a channel can someone help? Or point me to a good online instructional resource? I have googled all I can think of... -Mark

I need to erect a hoist beam with a 10' span using square tubing. Which is stronger, 3"x3" 1/4" wall or 4"x4" x 3/16"? Also, how much weight could I lift at the center?

Evening everyone, i have been referring to Shigleys "Mechanical engineering design" (pages 349 to 351) regarding a welded joint I am looking at. wanted to compare my manual calcs to sum FEA. My joint is a circular shaft which is fillet welded to a base plate. A load is applied to the end...

Hi. The question is: Draw the shear force and bending moment diagrams for the simply supported beam shown below. State the values of the greatest shear force and bending moment, and the bending moment at D. The diagram is attached as is my attempt at the answer. I hvae not stated the values of...

I have a door lever which has a 90 deg. bend. I need to calculate the length that this lever would have to be if it were in the form of a straight rod, prior to being bent. I know I have all the input data, I'm just not sure how to express this algebraically. For example, I know that the...

which workpiece has a greater spring back effec on bending? http://img94.imageshack.us/img94/6549/springback.jpg Should be A or B? How do i figure it out? by using spring estimation equation? thank you

Calculate the maximum B.M the symmetrical section can carry Plyweb with timber flanges (50x100 c.s.a) The maximum stress = 1.0N/mm^2 The structure is essentially an I beam with dimensions as follows. The central beam has a width of 25 and height of 500. The four flanges which...

This is more of a theoretical question. Not sure if this should be under this section or Mechanical Engineering. Homework Statement For 1018 steel, I tested the UTS to be about 83 ksi for a dogbone specimen with a circular cross-section. However, when I determined the Ultimate Bending...

Homework Statement im trying to write a program for a class but first i need the formulas for the bending moment and shear force. i have the displacement and angle of the cantilever beam under a point load: Y = -[(WX^2)/(6EI)][3a – x] for 0<x<a Y = -[(Wa^2)/(6EI)][3x – a] for a<x<L...

Hello all I have a beam bending problem I need some help on. I need to calcuate the deflections at the load (and in the plane of the load) for a simply supported beam with equal point loads overhanging the supports. However my beam is cranked as shown in the attached diagram of the problem...

Hi , I need to find out the forces and bending moments on, put simply a table. 4 stands are welded to a flat plate to resemble a table. An 8 tonne mass is placed on the table, which is distributed equally on the 4 corner stands. The stands are 2m high and the flat top is 2m by 0.4m. Each...

As far as I know there is no firm prediction of any Lorentz bending derived from mainstream Loop. The authorities on what Loop says or doesn't say are Ashtekar, Rovelli, and Freidel. These are the people that organizers of any major world conference on gravity and related science would normally...

The bending moment, M, at position x meters from the end of a simply supported beam of length l meters carrying a uniformly distributed load of wkN m^-1 is given by: M = w/2 l (l-x) - w/2 (l-x)^2 Show, using the above expression, that the maximum bending moment occurs at the...

I'm working on a project, and I need to make coils out of 5/8" diameter copper rod, ideally with center line radii ranging from 3 - 10 cm, and with turn heights of 5 cm. Most metal shops near me don't have the capacity to do this, because there rolling machines are based off of cold bending...

Is "Section Modulus" the same as a cross sections "bending strength modulus"? Good afternoon everyone, I am following an ECE directive that sets out the requirements for the properties of a "Rear underun protection device" for the rear of a lorry. It states that the underun bar must...

Hello, I'm working on a project involving a cross-linked network of beam-like objects. We take these networks and apply extensional and shear strains to it, then apply an energy minimization procedure to find the optimal positions for all the cross-links in the new state. Therefore I have to...

How do you calculate amount of power needed to slowly rotate shaft under bending moment? This is not related to transmittal of torque. Given: shaft size span between support bearings bending moment value rpm Assume: slow rotation (ignore centrifugal forces caused by deflection)

http://en.wikipedia.org/wiki/Bending Please have a look on the right most picture in "Stress in large bending deformation". The Stress distribution shows that the bending center is not locate at the middle of the cross-section. (which also happen at connection caculation) However, base on...

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...

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...

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...

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...