Shear Definition and 575 Threads

Homework Statement Homework Equations Moment of Inertia equation: I=(1/12)bh^3 Stress and Strain equations: Sigma= -(M*c)/I Tao = (V*Q)/(I*t) The Attempt at a Solution I know I need to use shear and moment diagrams to find the max moment so I can use the Stress diagram to...

Homework Statement Homework Equations The Attempt at a Solution I know how to work shear and moment diagram problems, but I am a little confused as to how to start this one. Does it matter that the force is hanging off the bracket? Can I just continue as if the force was acting...

I have computed the flow past a golfball and I am trying to calculate the shear stress on the surface of the golfball but I am having trouble figuring out how the wall shear stress is defined on 3D complex surfaces. When I am on the main part of the golfball that it is similar to that of the...

There is a question on my home work that I just don't understand how they got the answer they did. The first question is: In a prismatic bar, the load applied on both ends is 37 N causing the member to be in tension. If the cross section area of the member is 5.7 cm2 and the allowable stress...

Homework Statement A solid steel bar of diameter d1 = 60 mm has a hole of diameter d2 = 32 mm drilled through it. A steel pin of diameter d2 passes through the hole and is attached to supports. Determine the maximum permissible tensile load Pallow in the bar. -Yield stress for shear in pin...

Homework Statement My prof gave us this take home quiz to complete to prepare for our actual quiz. We are studying Shear force due to bending of beams (2nd year mech eng). In this question he told us that the shear force (V) can be applied at any of the points and that we would need to find the...

Homework Statement hi >>> this is my problem http://img39.imageshack.us/img39/7979/99979361.jpg Homework Equations The Attempt at a Solution need the solution >

Hi, I'm trying to get an expression for the shear rate in a rotating cylinder (as pictured) in terms of the inner cylinder radius, outside cylinder radius and angular velocity. The inside cylinder remains fixed and only the outer cylinder rotates. Assume that the distance x is small. Any...

http://s44.photobucket.com/albums/f46/maximus11373/?action=view&current=w-1.jpg&newest=1 An inclined member is braced with a glued block, as shown. The ultimate shear stress in the glued joint is 1050 psi. Determine the dimension X at which the glued joint will fail. I know that...

Just a few questions. 1). A bar of 2m and diameter 40mm, is subjected to an axial tensile force of 50KN. What will be the elongation and the reduction in diameter. The aluminium bar has a Modulus of Elasticity E = 70 Gpa and a poissons ratio v = 0.3 2). A 1.5m steel bar has a cross...

how can i work out the maximum shear stress of EN 19 alloy steel? i need this in order to work out the minimum shaft diameter that will be capable of withstanding the torque applied to it.

Hi could someone tell me if it is possible to calculate the shear loss from a metal piston ring against the cylinder in a hydraulic pump when the outlet pressure and speed (in rpm) of shaft are known. Cheers (Updated: maybe along the lines of in cylinder pressure x piston speed x friction...

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...

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...

Hi everyone, I'm struggling to get my head around the convention of internal moments and shear forces of a loaded beam. I just can't seem to make any sense of why F is facing upwards and F+dF is facing downwards. It's driving me absolutely insane. Surely both of them will be facing upwards...

A very tough question I'm trying to solve from my textbook as revision before exams. Thanks in advance. http://img509.imageshack.us/img509/1398/assignment.jpg

Dear all, I was trying to calculate the shear stress due to fluid flow inbetween two parallel plates from the velocity profile taken from the middle of the flow channel (along vertical axis 'y') using comsol. The solution i got is two times the analytical solution i have calculated. The...

Homework Statement A 20.0 meter long uniform beam weighing 820 N rests on walls A and B, as shown in the figure a)Find the maximum weight of a person who can walk to the extreme end D without tipping the beam. b)Find the force that the wall A exert on the beam when the person is...

For my job I have to calculate the maximum shear stress in a triangular thin wall steel beam. I know how to calculate this for a retangular shape. The general formula is: tau=Vy*Sza/(b*Iz) with: tau= shear stress Vy=force Sza = statistical moment b= width Iz = moment of Inertia I...

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...

Homework Statement Equation solved from previous problem: (g/\nu) = (1/r) d/dr [ r dvz/dr] T = \mu * dvz/dr Boundary condtions: vz (r=a) = vz (r=b) = 0 The Attempt at a Solution (d/dr)[d/dr r*vz = g*r / \nu (d/dr) r*vz = gr2/2\nu + A vz = gr2/6\nu + A + B/r I am...

Is there more than one meaning for "gravitational shear". It seems to refer to focusing of light beams. When I calculate the difference in velocity, of Earth's side closest and farthest from the sun: the difference is about one meter/second. Is that gravitational shear? Calculation...

Shear and moment diagram--Need help! Homework Statement On the attached question: Fpy = 10 N Ffy = 10 N Mp = 0.15 Nm Mf = 0.45 Nm Homework Equations Draw the shear and moment diagrams. The Attempt at a Solution If you look at the answer I posted, I believe the shear...

Homework Statement The bottom surface (8 cm x 12 cm) of a rectangular block of cheese (3 cm thick) is clamped in a cheese grater. The grating mechanism moving across the top surface of the cheese, applies a lateral force of 20 N. The shear modulus, G, of the cheese is 3.7 kPa. Assuming the...

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...

A load of 5kN is applied to the tensile member shown in the figure below and is carried at the joint by a single rivet of 20mm diameter. The angle of the joint is 60 degrees to the axis of the load (the axis of the rivet is at 30 degrees to the line of action of the load P). Calculate: (a) the...

hi there, I am completely stuck on this question and was wondering if anyone could help me out here; ''a metal wire has a diameter of 1mm. when subjected to a tensile load of 200N the diameter is 0.99925. if the youngs modulus of the titanium is 110GPa, determine the shear modulus of the...

Question We have a bent piece of metal subjected to a shear V; we're to sketch the distribution of shear flow along the leg AB. (see attached) What I've Done So Far I've tried to determine the second moment of inertia but have failed to produce the same results given in the hints...

Homework Statement High strength steel hollow shaft which can withstand complex stresses generated by a combo of loading conditions. Tresca yield criterion is to be used as the basis of design with a factor of safety of 1.5. Shaft is of 50mm and 40mm outer and inner diameters and is subjected...

Does anyone have the equation for this. I tried one from my textbook, and the answer I get is less than the average shear stress which is impossible. So I was curious to look at onother version, because perhaps the eq. has a typo? Also, does it occur at the neutral axis like it would in a round...

I am trying to understand the behavior of bolt in different plane. My doubt is when shear force acts on bolts in 2 different plane simultaneously, does it share the shear force (F/2) or each bolts experience the total force (F). I am sure that if there is a bolt pattern on the same...

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)...

Hi every one, I am going to find the maximum allowable torque of a 4340 shaft, 30Dia. However I think that the maximum allowable shear stress is still missing. Can i use the tensile strength instead?? http://www.matweb.com/search/DataSheet.aspx?MatGUID=4a3cfc1e1cfd451091e67d3f3b66bb80&ckck=1

Homework Statement A steel drum contains oil with a density of 0.712 and is standing on one of its ends. It has a diameter of 66cm and its height is 1.98m. The plate it is rolled from is 1.2mm thick and has an E=200GPa. It also has an ultimate strength of 510MPa. Homework Equations...

Question About Shear Stress "Naming" Convention I cannot seem to find this in any of my texts. For a shaft of circular cross-section, how do you name the shear stress \tau_{ij} caused by a Torque? That is, how do you assign the indices i j ? Is it the plane that contains the cross-section...

Homework Statement My main problem here is that I do not understand what they are asking. What is the wall shear stress? Do they mean the stress at the "floor" (or whatever you want to call it)? If so, I am assuming I use Newton's Law of Viscosity \tau=\mu\frac{du}{dy} since this is...

Homework Statement The beam is supported by a pin at A and a short link BC, as shown in Figure 3.0. Determine the maximum magnitude P of the loads the beam will support if the average shear stress in each pin is not to exceed 80 MPa. The diameter for each of the pins is 18 mm. The Attempt...

Hey guys. The question states:for the following beam, find the axial loads in the stiffening rods and the shear loads acting on each of the following edges. I basically worked out the shear for the panels by making an imaginary cut and letting internal momment equal to zero. Giving 70.7KN...

Homework Statement Question 3: The beam is supported by a pin at A and a short link BC, as shown in Figure 3.0. Determine the maximum magnitude P of the loads the beam will support if the average shear stress in each pin is not to exceed 80 MPa. The diameter for each of the pins is 18 mm...

Hello everyone, I am trying to test the collimation of light emerging from an off-axis parabolic mirror. My mirror has a diameter of 0.5m or so. The focal length is about 5m. The light source I am using is a red laser focused at a pinhole. To test the collimation of this point source, I am...

I'm installing a set of front brake calipers on my track car, and the mounting brackets are made of aluminum (7075). What is the better mounting scenario - Thread the mounting bolts directly into the aluminum, or use a through hole mounting method with a proper bolt and nut combination? The...

This is a problem given for laboratory analysis, but there are no relevant equations in our textbook to help solving the problem. Could anyone just give me a hint on what equation should be used to solve the problem? the only relevant equation I know is : shear stress = F/A 1. The figure...

Why does the shear modulus of a metal decrease with increasing temperature, on an atomic scale? Is it something to do with electrons gaining more energy allowing "layers" to slide around more easily??

Homework Statement I have an empirically-derived equation for the shear stress of a fluid on a surface, given by the equation below. I am supposed to take the derivative of density with respect to distance, and I must use this equation to find an expression for density. Delta = Boundary...

I want to be able to differentiate between longitudinal(P) and Shear(S) waves in solids. Using one Acoustic emission (AE) senor placed 2 to 20 cm form a AE source e.g. a stress induced crack or pencil lead test, how can one detect both the P and S waves and determine what part of the receive...

[b]1. A large plate moves with speed (v.o) over a stationary plate on a layer of oil of thickness (d) and viscosity (u). If the velocity profile is that of a parabola, with the oil at the plates having the same velocity as the plates, what is the shear stress on the moving plate from the oil...

I have a suspension arm that I am rebuilding, the main reason is to make it adjustable in length, and the other is to replace the ball joint. The original equipment is a standard automotive ball joint, greased and the shaft is 1 piece with the ball. The new setup would use a 5/8 spherical...

Hi How can i derive an equation to prove that a bolt won't fail due to shear stress if the length of thread engagement of the bolt with nut is equal to the diameter of the bolt. I got a formula, but i don't know whether it is useful in this case. A_s,e = pi*n*L_e*K_nmax*[1/2n +...

Hi, This is not homework but out of curiosity. On a diving board where are the points where stress is applied? Including shearing, compressible, and normal stress? Thanks

Alright so I'm working on my statics homework and am working on Shear Stress. I know that stress is the force divided by the cross sectional area, but how do I do it for these pins? I've solved for the forces in each pin by using the 3 equilibrium equations, can someone nudge me in the right...