Bending Definition and 665 Threads

Hi. I am solving some questions on transformations of stress and strain. I am getting stuck in one part of the question in all the problems. I am having difficulties to determine σx, σy, τxy at a certain point in the structure. Equations σ = P/A + Mc/I τ = Tc/J + VQ/It Some...

I have always thought that a radiation heat pump could be made if one could bend radiation perhaps beating carnots law. Do you think that if you have a big sphere at a temperture to emit visible light that radiation traveling through a vacuum inside the sphere could be bent around a smaller...

Hi!, Im relatively new and need some help on a simple problem. If i have a force in one corner of an object and want a resultant bending moment in the opposite corner, how do i find this? see attached image. Obviously i have two bending moments, 100Nx1.7m and 100Nx1.2m, how do I find a...

Hi there, first post on these forums. I have a seemingly simply question about beam bending. We (mechanical engineers) are all very familiar with the standard beam bending scenario. The beams are always shown being loaded perpendicular to the neutral axis, regardless of the type of support...

Problem: What is the equation that relates properties of a metal (modulus of elasticity, yield strength, elongation, etc) to how far it can deflect before permanently being bent. I can calculate how far a beam will deflect under different loading and support but I just don't know what the...

Hello, I am no mechanical engineer and my knowledge in bending is limited to Euler-Bernouilli beam theory. I wish to analytically calculate the normal stress of a plate bent by four points bending. I have already calculated this stress for a beam. However I cannot apply the beam theory...

Homework Statement Find the equations for the bending moment along AB and BC? Reactions at A = -15kN Reactions at B = 60kN Homework Equations F in the Y direction = 0 Moments with clockwise being positive = 0The Attempt at a Solution Moments about cross-section from the left before the...

Hello, I need to find the bending moment and forces at the mid point cross-sections of two separate beams connected together. One is a horizontal beam connected to the top of a vertical beam that sort of look like this: H======== H H H H There is a UDL of 10kn/m on the top member, with the...

Homework Statement A timber beam, with rectangular cross section (h × b) is reinforced with additional full width (b) steel plates. There is a plate of thickness t securely connected on the top and a plate of thickness 2t on the bottom of the timber to ensure composite action in bending. The...

Homework Statement When bending iron nails, the corrosion rate increases. Does anyone knows, why is that? Homework Equations The Attempt at a Solution

Hello, I'm a civil engineering student. I learned how to contruct a funicular polygon and bending moment diagrams in two different subjects and I realized how close looking the two are, so I wondered if there was a good explanation to relate the two. I can feel it's kind of the same as the...

hi all , I am a new member in physics forums and I hope I can help and get benefit from this forums . I would ask anyone knows about the moment of inertia cos i have not study it before and I have to know it to solve a bending stress problem .. when I used the moment of inertia for...

Homework Statement A Beam ABCDE is 10m long and supported at its left hand end A and at a point D which is 9m to the right of A. The beam carries concentrated loads of 5kN at B, which is 2m to the right of A, 10kN at C, which is 6m to the right of A, and 3kN at E. It also carries a distributed...

Hi, I've been working on a tubular sub frame, that I want to attach to a main frame. The attached shows the sub frame in black lines. The main fram is in purple. There are only four connection points and a force pushing down on each side. When I check for the reaction forces and make...

Need help!Matlab programming for shear force and bending moment diagrams of a beam Homework Statement A program is required that will calculate the shear force and bending moment diagrams for a cantilevered beam of arbitrary length. The loads may be point loads or distributed loads,or a...

Hello all can anyone advise me if i am doing this right, i have a 3m bar supported at both ends at 1m in 5kn and 2m in 10 kn, i understood that moments A = 1x5 and 2x10 =25/3 and support A upward force 8.3kn and B 5+10-8.3 = 6.7kn? anyhelp would be great thanks

Homework Statement Homework Equations moment = force x distance The Attempt at a Solution the book answer is different and doesn't show bending diagram. Can't tell what it should look like. Answer for maximum stress in book is way off: m=60 k*ft, s=17.1 in^3, stress = m/s =...

So for school I'm designing a ramp. The problem is that I need to calculate various things in it, none of which I've ever been taught, since I'm pretty sure it's all uni level. I've asked multiple teachers, including my physics teacher and my technology teacher, and they haven't been any help...

I am looking for an equation (or method to develop the equation) for bending of an irregular shape. I have only been able to find bending equations for beams. The attached picture shows the shape of the gusset being bent and the location of the force. If this were a beam it would be a cantilever...

Homework Statement Homework Equations moment = force x distanceThe Attempt at a Solution on sheet. According to the book, the max moment is 5.6 kN (at a distance of 2.4 m from point A), which was my calculation before adding the force at A (.8 kN upward) whats wrong?

Homework Statement I have a bumper and I am trying to determine whether or not the rectangular tubing I am using to build it is strong enough to withstand a given load (rear end collision). The horizontal member is 4x3x.1875 tubing (4" base, 3" high, 95" long). Two 3x3x.1975 tubes are used as...

Does anyone know of any good articles, journals or books that discuss the difference between simplified theoretical analysis of a beam under load and the actual real life effects? Need to do some reading up for an assignment but I'm having trouble finding anything of any merit! Cheers in...

Homework Statement Water enters a pipe and goes through a bend with a contraction from 40mm to 25mm then into the atmosphere. What is the horizontal force required to hold the pipe in place? Homework Equations I have either been given the following or have calculated them using the standard...

I do not really understand this as you can probably tell, but What is the difference bewteen Linear and Cubic displacement deformation functions in beam bending? For example why would one be used over another to model or calculate beam bending? or how does either type effect what bending...

So I just started learning to use the finite element package abaqus for modelling beam tip deflection under different loading conditions. I think I understand the theory behind it but was wondering if some one could answer a few questions about it to further my understanding. Firstly, how do...

Homework Statement Hey guys I'm having trouble drawing the bending moment diagram for this beam with a hinge? I'm not sure where to start? I've looked at stuff online and its completely different to the stuff in my textbook Homework Equations equilibrium equations ƩFx=0 ƩFy=0 ƩM=0...

Hey guys, as the title says I can understand why the neutral axis does not pass through the centroid after reaching a point where the bending moment is max before the beam collapses. Say you have a straight structure supported by two double I-Beams and a weight in the middle. Why does the...

curious as to the proper way to model this. beam is symmetric so centroid is in the middle (used to calculate distance from centroid d in bending moment of inertia equation) bending moment of inertia is I =\sum(I + Ad2) I=\frac{1}{12}bh b=base h=height d=distance of the area's...

why does the wavelength of light or sound waves affect the degree of bending?I know the mathematical formula for fringe width,but i want to know the physical reasons behind the phenomenon of bending. Taking the example of light passing through a small slit,the huygens principle talks about...

I am doing my internship in the factory produce pipe, kabel for automotive. We get one project from user to make a bended pipe... So far we bend it manually using some torsion tool and operated by human... The tug time is so high so we plan to make the machine if the cost is coverable...

I need to calculate the force necessary to bend a rod 180 degrees around a radius of 1.75 meters. Basically bending the rod into a horseshoe. I have looked at the simple bending calculations and I am sure this must be similar to those but I do not see anything for a constant radius bend. Any...

please let me know what is the nature of force that bends the path of photon during refraction.

Homework Statement I need to find the bending moment of a washer shape for a project I'm working on so I don't have an exact problem statement. Imagine that a washer was fixed (not pinned) around its inner radius and a force were applied evenly around the outer radius. How can I go about...

I need to calculate how much tension it would require to bend large insulated cable of various sizes around a pulley. The Conductor would be made of aluminum or copper and solid. The Insulation would be of various thicknesses depending on the cable. I was looking at breeaking this problem down...

I found this equation for predicting the bending natural frequency of a tube but am having trouble working it out. I was hoping that someone might be willing to steer me in the right direction. First the equation and the info provided on the website: w = (B*l)2 * SQRT (E*I/(rho*l4)) w -...

Hello everyone. I wanted to know if, for low wing single engine nose-driven prop aircrafts, there has ever been a measurement done, while in flight, of the actual amount of wing bending occurring during sustained level turns at a measured G force, including full power sustained turns...

Homework Statement A 97.4 kg basketball player can leap straight up in the air to a height of 71.9 cm. The player bends his legs until the upper part of his body is dropped by 61.2 cm, then he begins his jump. With what speed must the player leave the ground to reach a height of 71.9 cm...

The calculation for the maximum bending moment is to be verified experimentally... The calculation for the maximum bending moment is to be verified experimentally using a strain gauge bonded to the outer surface of the beam, at the point where the maximum bending moment occurs. Derive an...

Light's "direction" of travel, bending, and speed Hoping someone can clear up a few questions... At any particular instant in time (from anyone's perspective), is light (or a photon, if that helps) thought to have a specific direction of travel while between emission and absorption? I've...

Homework Statement A timber beam will be used to support part of the ceiling of a house. It is going to be attached to the walls as a simply supported beam, Figure 6. If three forces are applied to it and considering the weight of the beam as a uniformly distributed load of...

hi all, I've created the small program which deals with the calculation of plate bending with quadrilateral finite element, program is written with Fortran. I've included all the source files that need to compile the program ,I've even added the executable file (along with input file...

1. I have a rod as pictured in the attachment. The rod is at a 45 degree angle. The load force is 115.118lbf The force is y-direction is 97.954lbf The Force at A is 5 inches from Force in the y-direction. The force at B is 10.5 inches from the Force in the y-direction I need to find...

I understand that space is curved inwards by the mass of the planet and I understand how curved space could redirect things towards the planet when they are moving. What is strange to me is the idea that curved space time itself could move me towards the earth. Gravity it seems to me is an...

hi, I'm studying the book for elasticity theory and I stuck at one of the equation in that book, the stiffness matrix for elements(thin or thick plate) in bending is given in that form ke= t∫∫BT*Db*B*det(J)dζdη+∫∫BT*Ds*B*det(J)dζdη B is the strain matrix(5x12) where the inner...

You probably know how to bend water: Use a comb and rub it with wool (or just comb your hair) and hold it next to thin jet of water coming out of a tap. Here is a video: Comb with wool An explanation is offered here (the water molecule is polar). However, I remember my physics teacher...

Homework Statement Designing a safety pin for gate valve, picture is attached! Material: EN24 (λ=680MPa and E= 207 GPa) Total distance between supports = 98 mm! Force applied by gate is 64705 N! Question: Minimum diameter of pin for 1) No shearing , 2) a maximum deflection of 1 mm...

I have read in my Physics book that if gravitational acc and inertial acc are equivalent then gravity must bend light by a precise amount. What that means?What is inertial acc? What that equivalency has to do with general theory of relativity i.e with warping of space time?

If I bend a paper, it doesn't change the things written on it. If gravity is bent space(time), we shouldn't be able to detect it. (e.g. things shouldn't be dragged by it) So why are we talking about bending space, if it's not the space itself that is bending? it's only our mental...

Homework Statement The Attempt at a Solution Is this correct?

i thought the maximum deflection of a structure (a beam for example) occurred at the same location of the maximum bending moment. But, doing some homework I am getting contradicting results. does max deflection ALWAYS occur at the same location of the max bending moment? thanks for the...