Shear Definition and 575 Threads

Hi guys, I have an electric motor that comes with a flange to be bolted on a plate horizontally so that the 4 screws carry the weight of the motor and the momentum it creates on them. Could you direct me to how to calculate if the given screws and nuts stand up to the load? Perhaps an example...

Hi all, Just curious about how to size the thickness of washer for a particular class of bolt.(I'm not actually designing one but want to know how standard washers are sized.)I'm having a feeling that the washer will be under compression (Bearing surface of bolt head or nut).Bending will be...

Homework Statement Homework Equations ƩFx=0 ƩFy=0 ƩMo=0 The Attempt at a Solution I have no clue. By cutting the pieces, it changes the length. By cutting the cable at c and removing the 2 supports, wouldn't it make all the forces and moments = 0?

I was wondering how you incorporate an angled load into a shear force diagram? So far I've only been working with vertical loads and I've looked through my entire book without finding an example with loads at an angle, so I'm not sure what to do here. I know I have to end up at 0 so I see I...

hello all... Please can i know physically why the pressure drop in a fluid when there's shear stress? what happens? thank you

I have attached the problem. I am a bit confused on how this schematic works. The 3 forces on the bevel gear should translate to 3 moments where the bevel gear connects to the shaft. Will there also be any forces where it connects to the shaft?

Can anyone recommend a source of information that quantifies how wind shear effects the propagation of sound/noise? I know the basics in that wind shear either bends sound waves upwards or downwards but I'm looking for something that helps calculate the effect.

Homework Statement This is not a homework problem but a general situation where I'd like to know which is better to do. Say for example I have a cantilever beam of length L and some moment of inertia I, first moment of area Q and thickness t with a force P applied at the free end...

Homework Statement We need to design the cross section of a beam to make it suitable to carry a uniformly distributed load. The beam is held up by 4 ropes which are shown on my diagram as R. In the same attached picture I have the shear diagram and the bending moment diagram for this...

Hi, This is a question about shear center location. I know exactly how to calculate the exactly location. But I have trouble quessing the first "Imaginary" location. I have this picture http://i46.tinypic.com/16jesgo.jpg http://i49.tinypic.com/2v30xlk.jpg Now you see that the shear center...

fluid mechanics: defition of "shear flow" [rate of deformation tensor] I'm studying old undergraduate chemical engineering notes for an exam in grad school. Can't recall what this really means, can anyone explain to me what "off-diagonal elements" means and why the trig function velocities...

Hey people, I am embarrassed and I tried hard to find an answer on that one. I know that shear waves only travel in solid media but what happens on the border from a solid to a liquid. Does the shear wave cause a longitudinal wave? I found an article where a graphic shows that behavior but...

Homework Statement I am trying to find the Normal Stress of face AB in the attached picture, the shear stress in BC and AC and the maxium shear stress in side the rod. σx = 40N/mm^2 σy = 62.5N/mm^" Area =314mm^2 Homework Equations I have attached the relavent equation underneath the problem...

Homework Statement The depicted construct is made of a rod with a square cross-section and two plates. The plates are jointed together through 4 similar rivets. The square rod is welded to the wall at "B" and to the plates at the other end through peripheral corner welds. On the board acts an...

Homework Statement Derive expressions for the shear force V and bending moment M as functions of x in the cantilever beam loaded as shown. Then answer the questions. At x = 2 ft, V = M = At x = 9.3 ft V = M = I have attached an image of the question The maximum...

i recently came across a problem which has raised a question in my mind... heres the link to it http://www.mathalino.com/reviewer/mechanics-and-strength-of-materials/solution-to-problem-119-shear-stress the Rbh force tries to shear it horizontally while the Rbv tries to shear it...

I have completed bending moment and shear force diagrams and have a question asking for the mean shear stress. I know this is worked out using the formula: tau = F/A. I am unsure of what force to use is it the max shear force on my diagram? My other thought is that it could be an avergae of...

I'm trying to write a very simple program to generate shear and bending moment diagrams for beams. The thing is that I don't know what kind of loading that the beam may see so I want to be able to write it as generically as possible. I'm trying to find a web resource (not a book, unless...

Why when you compress materials like concrete do they fail in shear? Can the thing you're compressing be too small to fail in this way?

Hi all, I'm working on a heat transfer problem with a gas stream in a tiny tube. At my dimensions and flow rates, the flow still has a parabolic velocity profile. The mean radial velocity of the gas is zero, and I've treated the radial aspect of the heat transfer as strictly diffusion...

Homework Statement There is a section in my book that has the same title as the title of this discussion topic. I understand the math just fine, so this is a conceptual question. In the book the cross section is shaped and oriented like a C, and it shows the shear flow flowing...

Homework Statement The problem and the solution are in attached. Homework Equations The Attempt at a Solution What I'm confused about is the moment equation. Why does the equation reference both Ay and Ax, but it only considers the 3 kip force in one direction. Why doesn't it...

Hey guys, I am trying to conceptualize as to why shear stress in a vessel is highest at the wall of the vessel and why it is at a minimum at the center. First let me see if I actually understand shear stress - In a vessel with blood flow, it is the force required to overcome the...

what's the most illustration explanation or reason why a shear can pass from positive to negative in say a beam?

The relation between the vector operator curl and rotation in fluids and vector fields is treated thoroughly in many texts. And the uniform (pure or simple) shear of a solid is adequately described by the strain tensor. I'd like to put the two together. My guess is that an alternative...

I am looking for shear modulus (G) for Nitronic 50 or XM-19 High strength hot rolled condition UNS - S20910 and ASTM A276-10 it is surprising for me that material standards like ASME or ASTM does not provide shear modulus data..? even checked "http://www.keytometals.com" and...

Homework Statement I have a shear force diagram and I am asked to find the magnitudes of the point loads and where are they situated My question is, what am I looking for to find the point loads in a shear force diagram? Homework Equations The Attempt at a Solution

Homework Statement http://img189.imageshack.us/img189/9131/22465062cfdd4934b51d7f5.png Hopefully the image isn't too difficult to decipher... Basically a beam balanced on to pin jointed pivots with 6 metres in between each one. Homework Equations ƩFy = 0 ƩFx = 0 ƩMP = 0 The...

While doing an assignment on building with spaghetti I have come across the shear modulus. I need to find the shear modulus in order to use the torsion equation. Does anyone have a value for it by any chance?

Background: To prevent too much torque having to be transmitted through the gearbox on a gate valve, a shear pin is to be fitted between the hand wheel and the gearbox spindle. When a certain torque is reached the pin should rupture and no torque transmitted. See attachment for reference...

Hi all, I am currently studying civil hydraulics in my civil engineering course and we are going through estimating critical shear stresses for sediments. I am confused about the difference between boundary shear stress and particle shear stress. In terms of estimating critical shear stress...

It is said that the stress tensor \mathbf T for a fluid at rest is diagonal. Why is this? The fact that the fluid is at rest means there is no net force, i.e. the body and surface forces cancel each other: 0 = \mathbf F + \nabla \cdot \mathbf T, but from this condition is does not follow...

Guys when beam like this subjected to axial load only,it will create shear forces if we take a section inclined at an angle and this make since ,however when we design we don't look at inclined sections ,we just draw axial force diagram and we notice that there is not shear diagram , so this...

I was working on a question where I had to find the maximum shear stress in a I-beam due to a shear force applied on it. Heres the question : An I girder 600 mm x 300 mm has flanges 25 mm thick and a web 13 mm thick. Find the maximum shear stress due to a shear force of 500 kN and compare this...

Hello, Does anyone have the shear modulus value for Alu Bronze CW307G-R680 Cheers Ben

Homework Statement The material for the bolt shown in the angled joint above has an ultimate tensile strength of 500 MPa and a shear strength of 300 MPa. The diameter of the bolt is 8 mm. Determine the factor of safety in operation. Homework Equations The Attempt at a Solution...

This is the my homework.Who can solve this for me ? i upload my solutions and the problem .Thanks.

Hi , I want to calculate force required to cut a 1200 mm -3.5 mm sheet using incline shear blade. Anyone know what formula we can use in this case when we are cutting metal on an blade angle of 1°. Thanks Please help.

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...

Homework Statement A rod with a diameter of 1.00 in and length of 6.0 ft undergoes an axial deformation of 0.150 in when subjected to an axial force of 52.0 kip. The diameter of the rod decreases by 0.0007 in at this load. Determine the modulus of elasticity, Poisson's ratio and the shear...

Homework Statement Given in uploaded file Homework Equations σallow=\frac{P}{A} τallow=\frac{V}{A} The Attempt at a Solution Given in uploaded file Answers are d=16mm, h=10mm I tried using methods used in previous questions but it didn't work out for me here, if anyone could...

I have drawn the following shear force diagram however it says it is wrong. Could somebody please explain to me what is wrong with it. The points in the diagram are 0 then -4 then 1.25 then 1.25, then back to 0.

Sorry, I meant to title it "Basic statics question on bending moment equation." Oh well. Homework Statement Problem F7-7 http://www.scribd.com/doc/94480961/Chapter-7-Fundamental-Problems Homework Equations Summation of the forces in y, summation of the momentsThe Attempt at a Solution I...

Homework Statement Homework Equations Mx=200Nm My=300Nm Mz=600Nm Normal stress caused by bending moment at A = Mc/I = (300*0.02)/((pi*0.02^4)/4)= 47.7MPa. This answer is correct. Shear stress by Torsional Moment=Tc/J Polar moment of inertia J=(pi/2)*c^4 So I...

Homework Statement Given the simple beam in the picture, draw the moment and shear diagram. point loads = qa distributed load : q on a length of 2a where M - is the moment, T - is the shear Homework Equations The Attempt at a Solution I draw the shear diagram, found all the ractions but I'm...

Homework Statement A draw bar between a tractor and trailer is made from a length of steel bar 0.08m by 0.012m rectangular cross-section. The load is transmitted by means of a 0.015 diameter pin at each end. Determine the maximum stresses in the bar and pin if the axial load is 10,000N...

Please Help. Trying my best Homework Statement Locate the Shear Center of the Cross Sections Below: 1. http://tinypic.com/r/98xfd3/5 2. http://tinypic.com/r/15s4hfk/5 Homework Equations τ=VQ/IT The Attempt at a Solution 1. Moment = O Solve for Ve τ=VQ/IT...

Background: To prevent too much torque having to be transmitted through the gearbox on a gate valve, a shear pin is to be fitted between the hand wheel and the gearbox spindle. When a certain torque is reached the pin should rupture and no torque transmitted. See attachment for reference...

So i have a stub axle shaft, I have determined maximum bending stress at several locations and the bending moments, my question is how do you calculate shear stress in a cantilevered beam? I assumed the shear would be longitudinal along the shaft. Thanks for any assistance given.

I have the problem below, my question is what should the shear force diagram look like, I know its just a simple cantilever so does that mean the shear force diagram will be very rectangular looking?