Bending Definition and 633 Threads

Homework Statement Draw the axial force, shear force and bending moment diagrams. Show the locations and magnitude of the maximum and minimum values. Homework Equations See diagram. The Attempt at a Solution I've worked out the values from points A-B and then from points B-D. I...

Question : A beam 10 meters long, with 3 forces acting on it and 2 re-acting forces on it to keep it in equilibrium. The re-acting forces are at 2 meters from either end. The forces onto the beam are at 3 meters from the left end of 10kN, 10 meters from the left end of 20KN and a distributed...

I have just calculated the bending moment of a beam for every metre over a 10 metre length, the beam is pinned at both ends. Is it possible for the full diagram to be Negative?

Hi everyone, Recently I faced a problem in calculating bending stress in a long UPN profile "flange" due to concentrated force. It seems that the regular/familiar formula for bending stress in a finite/short element does not applicable in local bending of long/infinite beam. See sketch...

Hello. First time on the forum. I have a plate being supported off a series of beams (see pdf). The beams are close together and restrained. The plate is simply supported on all sides and the beams simply supported. The plate is to be used to distribute a point-load over the beams and is...

Dear All, Please see the picture. I need to find the bending stress for that profile. Its hollow tube dia= 38 mm, 4 mm thick. its is acted with udl of 500 N/m2 on its outer surface. How can I estimate the bending stress, deformation. Assume it as mild steel with E = 200 Gpa, poission...

my question is regarding calculation of deflection of a composite beam, ie a beam with a cross section made up of 2 separate homogeneous materials. the methods i know for calculating deflections in homogenous beams are energy methods(catiglianos 2nd) and the elatic curve equations(second...

I'm having trouble fully understanding bending moments. I get the calculations, the force times distance (lever arm), and how to calculate the bending stress (M*y/I). Its the orientation/direction that I am having trouble picturing in my head. I know this is pretty basic, but I just haven't...

Can anyone help me calculate the maximum bending moments and maximum stress for the figure i uploaded please.

In the essay „Über die Ablenkung des Lichtes I am Schwere*feld der Sonne“ ( http://adsabs.harvard.edu/full/1931ZA...3..171F ) the authors - Freundlich, Klüber and Brunn - presented 1931 graphically the results of three expeditions, which took place 1919, 1922 and 1929. They put together all...

Imagine that the electro motor is rotating the blade in air at sea level: http://img822.imageshack.us/img822/4655/222on.jpg During this rotation the air impedes the blade’s rotation and if the blade rotates too quickly or if it is made of fragile material rod will be simply broken or bent...

Dear All, I have been trying to calculate the bending moment redistribution on continuous, steel fiber reinforced, beams. The idea is simple, introducing to the ANSYS model elements, with lowered E-modulus, according always to the evolution of the cracking observed on the actual tests...

Hi, I am trying to obtain a relation for calculating the deflection of a parabolic plate of thickness (say 't') clamped at one end, with a concentrated load along the center line at the "apex" end. Any direct links for the formula? Thanks!

3) A wooden joist of rectangular cross-section spans a gap of 5.0 m and supports a load of 30 kN placed 3.0 m from the right-hand end. The joist has a depth of 150 mm and the maximum tensile strength that it is allowed to withstand is 12 MPa. a) Calculate the bending moment 1.0 m and 2.0 m...

Hello friends, a question about the engineers bending equation, M/I = E/R = (sigma)/y so take for example a beam with a rectangular cross section with depth 'b'. Will y then equal b/2 ? As y is measured from the neutral axis? Thank you in advance for your time, Claudius

Homework Statement there's a composite beam that's wood on top (150mm along the x axis, 250 along the y) and a little piece of steel along the bottom (150mm along the x, only 10 along the y). Ew is 10,000MPa, Es is 200,000MPa (these are the elastic moduluseseses). the beam is to be analyzed...

I am reading God's Equation by Amir Aczel and he talks a lot about the early observations of eclipses which showed a displacement of the starlight around the sun, because space is curved around massive objects. But why does light bend away from the sun? If it's being affected by gravity...

Homework Statement Calculate the reaction forces at B and D See attached jpeg. The Attempt at a Solution sum of vertical forces By + Dy = 7 + (9*5) Do I then solve for the moment about D or A or B? for moment about D i have: -Dy -7 -(9*5)+9By+(12*2)=0 is this correct, please explain to...

A simply supported beam is loaded with a uniformly distributed load (UDL) W=40 kN/m from C to D. The maximum Bending Moment value occurs at the mid-length of the beam, i.e. 3.5 m from the left hand end A. What is the value of the maximum bending moment? Give your answer in kNm, with 1 decimal place.

Homework Statement Calculate bending monents at 1m intervals along the beam Homework Equations The Attempt at a Solution I'm not sure where to start really? I think this is nearly there? Ma = 0 M1 = -5 x 1 M2 = (-5 x 2) + 26.7 M3 = (-5 x 3) + 26.7 - 10 M4 = (-5 x 4) +...

Hello, I have a small question about moments and bending moments. So, if I have a beam with a loading given by q (N/m) which is given as a function of x then what do these calculations get me? \int xq(x) dx \int (\int q(x) dx) dx The first integral gives me the moment about a point because I...

Homework Statement The beam ABCD in question is 10m long with supports at A and C. At B there is a 50KN point load and another 20Kn point load at D. The is a uniform load between A and c of 30KN/m. A is 8m from C, A is also 2m from b and d is 2m from c. I need to find the max bending...

I'm having some troubles understanding how spacetime actually looks and what causes gravity and unifying the idea with the general relativity consequences, like light bending. So, if spacetime is bent by massive objects like in this picture: HOW does the light bend outwards that massive...

Pertaining to conduit bending and ease to pull wire, would it be easier through one 90 degree bend of a set radius, or would it be easier to pull through two 45 degree bends using the same radius. The 45's could be any distance apart from each other, I don't think it would matter too much (am I...

hi i want to find out the bending moment of a beam at a distance from one end is given by M=1/2\omega (lx-x^2) where \omegaand l are constant. how do we find maximum value and why its maximum value i would realli apreciate it if someone would help me

Ok, so I have a problem as follows: A beam is simply supported at joints A, B, C D and E. there is a UDL acting on the BC member The member is 6m long with a UDL of 60kn/m However the tricky part is that this member is 1.2 times higher than the height of the members AB, CD, and DE. So BC =...

Homework Statement see attached. this question is from a test that doesn't allow any calculators and usually makes students solve the problem in 1 minute max. Homework Equations perhaps biot savart is to be used? but I doubt that can be done in the time limit... The Attempt at a...

I have three questions and need to calculate the magnitude of the maximum bending moment 1) A 4 m long aluminium alloy beam, simply supported at its ends, carries a central concentrated load of 2 kN. The T-cross-section of the beam (see Figure A2) consists of a rectangular flange and web...

i don't know whether to use the yeild srength or allowable stress to determine section sizes of a beam please help me :) thank you.

Hello friends, so i have this problem: A beam under test has a measured radius of curvature of 300 m. The bending moment applied to it is 8 Nm. The second moment of area is 8000 mm4. Calculate the modulus of elasticity for the material. ok so using the engineers bending equation i have...

I think this is the right place to put this. If not I apologize. Feel free to move. I am trying to solve the bend angle for a bar given specific dimensions. The bend angle is acute as in the bar traverses the pin for more than 90-degrees. The bend angle is the angle of the projected lines...

Say I have a wooden beam with an angled pattern in it if the beam is flexed (and assuming First order shear deformation theory holds: parallel lines remain parallel after flexing) what would the flexed pattern look like? I think it would look like the pattern in the middle picture since the...

Hi. I was assigned this coursework by my lecturer. The problem is I have only been taught how to analyse a solid beam section and not a hollow section as is shown in the problem. What I would like to know is how to calculate the area. Usually I would do this by calculating Length x Breadth. I...

Bending moments Help! Hi guys, didnt really know how the layout of a bending moment diagram would fit under the standard template provided so i'll have a bash at explaining the problem. On my school course i have been doing bending moments/diagrams and shear force diagrams, but a few days...

Resolving Forces - Shear and Bending Moment - :) Homework Statement The data table and associated questions are rather complex, if you have the time it would be much appreciated if you could have a look at the attachment and provide me with a solution or point me in the right, i just can't...

Would anyone be able to explain how to calculate and use bending moments? I have been studying cantilevers and Euler's strut and I don't understand the following: Why for a cantilever the bending moment is positive, and for the Euler strut the bending moment is negative. As far as I can tell...

I think the broadest way to frame this question would be as follows: "If a metal conductor (copper wire) were bent at room temperature, then placed in a cryo-cooler and cooled to ~30-80 kelvin, would it experience any 'unbending?'" More specific to the situation, I've bent down the center...

Very simply put. Is it possible to determine bending stress in a beam without knowing the young's modulus of the material used? All equations I've seen seem to include in some form an E value ( young's modulus), which is used in conjunction with a stress value to evaluate the strain.

I have the solution's manual for this particular problem, but I'm having hard time understanding the steps they've taken. I've attached pictures of the problem below. For the shear, are they using 1/2*x*(wx/L) because it is equal to the area of the force? And for the bending moment, where are...

Hello, while solving bending of light problem, where I shoot a light ray from one tower to other. How much light has fallen upto the middle point ? I was able to reduce the eq to \phi=\int[1-a(\cos\theta+\frac{1}{1+\cos \theta})]^{-1/2}d\theta a is very small, also if there is no gravity "a"...

Homework Statement A beam ABCD simply supported at A and C. AB= 2 m, BC= 6 m, AC=8m and CD= 2 m. It carries a uniformly distributed load of 30 kN/m between A and C and concentrated loads of 50 kN and 20 kN at B and D respectively. I want to find the maximum bending moment and its distance...

Homework Statement The problem is to determine the maximum deflection when a person is standing on the beam in the attachment. E= 206.8 GPa, v=0.3 Homework Equations (although I am not completely sure if this one is relevant)The Attempt at a Solution I've thought a bit about the problem...

I am having trouble trying to find the force required to accelerate a wheeled cart. so that i can calculate the bending moment in a stopping bracket, the bit I am stuck on is The Acceleration of the cart, the situation is; An 80,000Kg Wheeled cart runs on rails from rest and hits a stop...

Homework Statement I have an assignment that is similar to the following question. I believe if i am able to do this question i will be able to do the assignment. However I cannot seem to be able to get this question right. Below the question and answer...

In strength of materials, we have to do a project using strain gages to measure a weight between 0 and 10 lbs with an accuracy of .1lbs. My group is using bending strain. We have a formula, S_{}b=\frac{F*L*6}{E*b*h}, where F is the weight applied, L is the length, E is the Young's Modulus, b...

I'm trying to construct a bending moment diagram for the situation as below: [PLAIN]http://img42.imageshack.us/img42/633/bmdiag.jpg Where Ra and Rb are reaction forces, L1 and L2 are lengths between Ra and N and N and Rb respectively, N is a force acting perpendicular to the beam and P is...

Homework Statement Draw the shear force and bending moment diagrams for the beam shown in Fig. 1 below. Determine the maximum tensile and compressive bending stresses and the positions at which they occur. The beam’s cross-sectional area is shown in Fig. 2...

I just watched a show on Einstein concerning this theory of general relativity. Around 1922 photographs of stars from an eclipse were used to measure the bending of light from those stars around the gravitational field of the sun. Those measurements were used to confirm Einstein's theory. All...

Well I know I need to plot Mohr's circle for this, but what are the things i need to do before reaching that stage.here is the question: A 250mm diameter pulley is mounted on a 50mm diameter shaft at a distance of 200mm from a ball bearing. If the belt tension ratio is 3 to 1 determine the...

I read an article about Brake Shafts bending behavior due to braking. Assume that there is a Shaft and to its end a brake disc is fixed. The shaft is set to rotate at certain rpm. Now when brakes are applied it seems the shaft tend to bend. Could anyone explain me the reason for this...