Shear stress Definition and 232 Threads

  1. N

    How Do You Calculate Maximum Shear Stress in an I-Beam?

    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...
  2. M

    Answer: Factor of Safety for Bolt Shear & Tensile Stress

    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...
  3. A

    How to calculate normal stress and shear stress on the beams.

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

    What is the relationship between normal and shear forces in structural analysis?

    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...
  5. S

    Solve Shear Stress Qn: Mx,My,Mz, Mc,I,J, VQ,It

    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...
  6. S

    Max Stress + Shear Stress for 10,000N Axial Load

    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...
  7. W

    How do you Calculate shear stress?

    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.
  8. G

    Materials Science Help - Slip Systems & Resolved Shear Stress

    Hi everyone, I've taken a course at uni that may be a little bit over my head, and am pushing through an assignment for it at the moment in an attempt to do well. I've hit a bit of a roadblock on one question though, so am hoping that someone kind here can help me out! The question is...
  9. V

    Torsional shear stress for square bars

    Hi can anyone help how to calculate torsional shear stress for square bars Regards, venkata prasad.G
  10. J

    Howt to calculate shear stress?

    I have a cross-section of a beam like this one http://imageshack.us/photo/my-images/810/img0129xf.jpg/ And I have to calculate the shear stress τ. I have these things allready calculated: Xc=8cm; Yc=6.9cm Moment of Inertia Ix=2946.7 cm^4 Moment of resistance Wmin=323.8 cm^3; Wmax=427.1 cm^3...
  11. P

    Find the average shear stress at each pin

    Homework Statement View image for all details Homework Equations tao = V/A The Attempt at a Solution I went ahead and solved the force at BC and the x and y components at A, but I feel as though my solutions are incorrect. At BC I have F = 825 kN (up and to the left), A_x = 714.5...
  12. A

    Why shear stress is produce in shafts

    hi my name is adil from Pakistan.what is a reason to produce shear stress in shaft,can normal stresses is produced in shaft&where is max shear stress is apply in solid shaft at end or center.
  13. B

    Calculating Shear Stress in a Flange Coupling with 4 Bolts

    Homework Statement A flange coupling is use to transmit torque of 1500 Nm between two shafts. The coupling has four 8mm dia. bolts equally spaced on a PCD of 175mm. Determine the shear stress on the bolts Homework Equations fs=\frac{F}{A} The Attempt at a Solution Back of the...
  14. S

    When calculating the shear stress, what should the area be?

    Homework Statement I'm looking at some problems and solutions to them, and when they calculate shear stress instead of having the area of the thing be pi*r^2, there is usually a (pi/4)*r^2. Homework Equations Shear Stress = V/A The Attempt at a Solution I don't understand where...
  15. R

    How Do You Calculate Shear Stress in a Circular Bar Under Axial Compression?

    Stress's for circular bar? Calculate the maximum normal and shearing stresses of a circular bar with diameter 0.05m and axial compression load of 150000 N .. I know for stress = Force / Area, how do you solve for shear stress?
  16. N

    How to Calculate Shear Stress in a Wooden Block?

    Homework Statement Homework Equations \sigma = F/A The Attempt at a Solution I understand that I should evaluate the different forms of stress to find different values of the ultimate load. I also understand that I should choose the smallest value among them since anything...
  17. G

    Calculating Shear Stress & Safety Factor for Double Shear Pins

    Homework Statement I just want to know the difference between certain equations for shear stress. I'm trying to find the factor of safety for pins that are in double shear and have a circular cross section. Homework Equations So far I've used stress = 2F/pi*d^2 for double shear...
  18. F

    How to Calculate Shear Stress in a Pinned Shaft?

    So I am trying to figure out this shear stress problem that I have no idea how to approach. I have a shaft which is transmisitting a torque. It can be locked to its housing by using a pin which passes through it radially. I need to know that the shaft won't snap when transmitting its torque...
  19. S

    How Is Maximum Shear Stress Calculated for a Solid Circular Shaft?

    Homework Statement A solid circular steel drive shaft is 4 m long and 60 mm diameter. The modulus of rigidity of the steel is 85 GPa and its maximum allowable shear strength is 150 MPa. The shaft is used to transmit a power of 30 kW while rotating at 500 rev/min. Calculate the following...
  20. P

    Shear Stress & Hole Compression

    Dear forum, I need some guidence on how to solve shear stress on a pin and the hole compression due to force load on the pin. I haven't provided number as I can work those out later, but simply I am asking for a step by step! [PLAIN]http://img835.imageshack.us/img835/8623/problemsb.jpg
  21. M

    Why can maximum shear stress in a web be replaced by the average shear stress?

    I've been reading my strength of materials text about design of steel beams. I understand everything up to the point where the text tells me to use the average web shear stress (V/dt) instead of max shear stress (VQ/It) to determine if a given beam is within the allowable shear stress. I...
  22. C

    Can We Lift a Giant Tank with D-Bolts? Analyzing Shear Stress on Sheet Metal

    Hey so I am currently trying to calculate whether or not we can lift a giant tank made of corrugated sheet metal. I am looking for conceptual answers here, but will give some details. A potential plan is to place a number of D-bolts (let's say 8 for now) through holes near the top of the...
  23. L

    Cantilever Beam subjected to shear stress

    Homework Statement A cantilever beam (length, L, height, 2h, thickness 1). The top surface is subjected to shear stress tsubxy = s. Determine the stress function psi. The boundary conditions at the end of the free end (x=L) can be satisfied by integration (e.g., traction free can be...
  24. A

    Max Shear Stress Homework: Find Max Stress

    Homework Statement Find the maximum shear stress for \sigma _{xx} = 120 MN/m^2, \sigma _{yy} = 50 MN/m^2, \tau _{xy} = 40 MN/m^2Homework Equations \sigma _{min} = 0.5(\sigma _{xx}+\sigma _{yy})-0.5((\sigma _{xx}-\sigma _{yy})^2+4\tau _{xy} ^2 )^{0.5} = 31.8 \sigma _{max} = 0.5(\sigma...
  25. Q

    Shear stress in Energy-momentum Stress Tensor

    Hi all - first post at PF. As a 'science enthusiast' with no training in the tensor math of GR, was initially bewildered by the common assertion that still hypothetical 'dark energy' would act as a source of 'negative gravity' despite having positive energy density. Finally grasped that pressure...
  26. C

    Average Shear Stress on a Plate

    1. Problem Statement The long bolt passes through the 30-mm-thick plate. If the force in the bolt shank is 8kN, determine the average normal stress in the shank, the average shear stress along the cylindrical area of the plate defined by the section lines a-a, and the average shear stress in the...
  27. R

    Internal Shear Stress Question

    Something has been bugging me for a long time, since I took my first statics class a few years ago. I have a problem with a common figure found in many statics books. I have attached the figure to my post. My question deals with the delta V added to the shear force on the right side of the...
  28. J

    Slip walls or Zero shear stress

    Hello I am trying to understand if is it reasonable to use "slip walls" or "zero shear stress" to model smooth walls. I am working with turbulent air flows in ducts. Please share your comments.
  29. T

    Is There a Standard Nomenclature for Shear Stress Direction in Fluid Mechanics?

    What is the definition of shear stress in a cylindrical tube? It seems like sometimes that is written \tau = \mu \frac {\partial u} {\partial r} but then at some magic moment it gets rewritten as \tau = - \mu \frac {\partial u} {\partial r} so as to arrive at formula like \tau = -...
  30. J

    Calculate Shear Stress & Force in Beam for V=125kN

    Homework Statement Determine the Max, Min & average shear stress, and the shear force in web V = 125kN Note th attachment Homework Equations The Attempt at a Solution First I calculated the Moment of Inertia I = (1/12)(bh3 - bh13 + th13) = 3.43X10-4 m4 Max Shear...
  31. C

    Does inviscid mean shear stress is negligible?

    I have this flow with Reynold's number in the 10^5, which I think it's big enough to treat the fluid as inviscid, does this also mean I can assume the shear stress is negligible?
  32. T

    Shear stress on a bar with a bend

    Homework Statement I have encountered this problem several times in class, but have never really understood it. There is a solid round bar that is fixed on one end, and that bends 90 degrees a ways down. At the free end of the bar there are forces applied in each Cartesian direction. Like...
  33. F

    Shear stress for annealed & toughened glass

    [FONT="Arial"][SIZE="4"][SIZE="5"] Are there any figures available for shear stress of annealed and toughened glass?
  34. N

    How is wall shear stress defined on complex 3D surfaces?

    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...
  35. M

    Solid mechanics (shear stress) question

    Hi, if the shear stress on an element in a solid is SAy/bI, where S is the shear force and y is the distance from the neutral axis, what value of y do i use if the point I'm calculating is on the neutral axis?
  36. W

    Determining Ultimate Shear Stress in Glued Joints

    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...
  37. H

    A few questions about Direct and Shear stress

    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...
  38. A

    Max Shear Stress Calculation for EN 19 Steel Shafts

    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.
  39. B

    Comsol-Fluid flow and shear stress

    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...
  40. I

    Shear stress distribution in triangular steel profile

    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...
  41. W

    Shear Stress Differential Equation

    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...
  42. N

    Which Area Should Be Used to Calculate Shear Stress in a Cheese Grater Scenario?

    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...
  43. S

    Calculating Shear Stress on a Rivet in Tension with Angle of Load

    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...
  44. B

    Maximum shear stress in square tubing

    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...
  45. S

    Shear stress on bolts (in different planes)

    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...
  46. S

    How to obtain Allowable Shear Stress

    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
  47. M

    Calculating Shear Stress in a Steel Drum

    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...
  48. L

    Fluid Mechanics (Shear Stress)

    1. Question 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...
  49. Saladsamurai

    Question About Shear Stress Naming Convention

    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...
  50. Saladsamurai

    Fluid Mechanics~ Wall shear stress

    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...
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