What is Shearing: Definition and 37 Discussions

Sheep shearing is the process by which the woollen fleece of a sheep is cut off. The person who removes the sheep's wool is called a shearer. Typically each adult sheep is shorn once each year (a sheep may be said to have been "shorn" or "sheared", depending upon dialect). The annual shearing most often occurs in a shearing shed, a facility especially designed to process often hundreds and sometimes more than 3,000 sheep per day.Sheep are shorn in all seasons, depending on the climate, management requirements and the availability of a woolclasser and shearers. Ewes are normally shorn prior to lambing in the warmer months, but consideration is typically made as to the welfare of the lambs by not shearing during cold climate winters. However, in high country regions, pre lamb shearing encourages ewes to seek shelter among the hillsides so that newborn lambs aren't completely exposed to the elements. Shorn sheep tolerate frosts well, but young sheep especially will suffer in cold, wet windy weather (even in cold climate summers). In this event they are shedded for several nights until the weather clears. Some sheep may also be shorn with stud combs commonly known as cover combs which leave more wool on the animal in colder months, giving greater protection.Sheep shearing is also considered a sport with competitions held around the world. It is often done between spring and summer.

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  1. E

    Engineering Normal and Shearing Stress - Combined Loading

    Here is my combined loading: The book solution for normal and shear stresses respectively are: a) ##20.4~\text{MPa}, 14.34 ~\text{MPa} ## - I find both b) ##-21.5~\text{MPa}, \boxed{19.98~\text{MPa}}## - I find the normal stress, but I'm not getting the book answer for the shear stress...
  2. vivek_salman

    Shearing / Cutting Force - Rubber bale

    I have been assigned by my tutor to design a hydraulic guillotine (rubber bale cutter). After designing its features of the hydraulic, cutting blade etc. I tried to calculate the force needed of cutting a piece of Rubber bale (Natural as reference) having an ultimate tensile strength of 30 MPa...
  3. R

    Understanding Shearing Stress & Tangential Forces on Fluids

    what does it mean that fluid cannot sustain a force that is tangential to its surface.which surface fluids's surface or container? and what does it mean it cannot withstand shearing stress.what's shearing stress and what does it mean here.and why exert force only in direction perpendicular to...
  4. CameronRose

    Shearing when bolts are arranged radially

    Hi folks, I'm currently working on a final year project on the design of a plunger pump. The most recent area I have been studying is the loading on different joints in the pump. For a simplified example I have determined the maximum torque load on the crankshaft from the plungers for the...
  5. Chadi B Ghaith

    Understanding Absolute Viscosity - shearing stress

    Understanding Absolute Viscosity - shearing stress Hi everyone, I have found information about Absolute viscosity: Coefficient of absolute viscosity is a measure of internal resistance. Dynamic (absolute) viscosity is the tangential force per unit area required to move one horizontal plane...
  6. C

    Understanding Shearing Strain: Explanation and Examples

    Homework Statement In the notes , refer to the circled part . It 's stated that the shearing strain is positive when the angle formed by two surfaces oriented along positive y and x axes decreases .. Homework EquationsThe Attempt at a Solution . As we can see from the figure( paralleogram ) ...
  7. F

    Finding shearing force and moment

    Homework Statement i couldn't understand why the author take the distance of force 129kN for 4<x<6 and 6<x<8 is x-2 ? Homework EquationsThe Attempt at a Solution IMO , for 4<x<6 , the distance of force 129kN to the point should be x , where x is the distance from the 129kN to the...
  8. F

    Direction of shearing force

    Homework Statement why for 0 <x <3 , why the author ignore the 10kN ? as we can see , the 10kN is located 3m from A ... 2nd question is , the author assume downwards force is positive , am i right ? Homework EquationsThe Attempt at a Solution for 0 <x <3 , the shearing force V = 4kN , as...
  9. henil

    Lateral shearing interferometer

    what will happen to fringes if the shearing plate thickness is changed ?
  10. M

    How to calculate edge shearing of a member?

    in the case of the picture below, for the central plate of thickness 1 inch, is it the force on a bolt F/2 divided by 2at that results in F/4at ?thanks
  11. G

    Direction of shearing force

    Homework Statement why the shearing force acting on the object in the first diagram is in different direction , while in the second photo , it's in same direction ?Homework EquationsThe Attempt at a Solution in my opinion , it should be in different direction , because the shearing force must...
  12. D

    Producing a shearing force diagram and bending moment curve

    Homework Statement A box shaped vessel, of ##4## compartments and ##80m## lenght, light displacement of ##800## tonnes loads ##200## tonnes in the first compartment and ##200## tonnes in the last compartment. Produce the shearing force diagram and bending moment curve. Homework Equations 3...
  13. R

    Shearing Force - Cutting Force

    I have been assigned by my tutor to design a plastic granulator. After designing its features of the shaft, rotor etc I tried to calculate the force needed of cutting a piece of plastic (POM/Polycarbonate) having an ultimate tensile strength of 70 Mpa (shear strength assumed to be equal to...
  14. A

    Doubt Regarding Shearing Stresses In a Beam

    Lets say we have a beam which is simply supported at the two extreme ends(support conditions don't matter in my question). A concentrated transverse load is applied at the halfway point. Now let's say we take a section at x= L/3 where is L the length of the beam. Now we know that transverse...
  15. M

    Shearing Stress at a point

    Hello, I am having confusion when calculating the first moment of area, Q, to solve for the shearing stress at point a in 13.9, I use the area which is above the point, but for 13.28 its to the right of the point. It seems they are both subjected to a vertical shear, so I don't think that has...
  16. N

    Determine max notmal stress, average shearing stress and bearing stres

    Homework Statement The position of piston Cd is locked and force P = 350lb is applied as shown. The diameter of all pins and bolts is 3/8 in., member BCE has a thickness of 1/4 in., and member Ef has a width of 1 in. adn thickness 1/4 in. Homework Equations The Attempt at a...
  17. N

    Find in-plane shearing stress parallel and perpendicular to the grain

    Homework Statement The grains of the wooden member forms an angle of 15° with the vertical. For the state of the stress shown, determine (a) the in-plane shearing stress parallel to the grain, (b) the normal stress perpendicular to the plane. I have attached an image of the question...
  18. M

    Shearing stress and bearing stress.

    first what's the difference between bearing and shear. I managed to solve a easily. for part b i calculated fb(√(bx^2+by^2) and divided by ∏*4^2 I don't know how to solve c.
  19. R

    Angle of Twist and Peak Torsional Shearing Stress

    Homework Statement A stepped solid shaft of circular cross section is rigidly clamped at ends A and D and loaded by twisting moments T1= 1kN.m and T2 = 1.5kN.m at points B and C. The material is steel for which G = 84x10^9 N/m^2, the length L of the shaft is 500mm, and the diameters of AB and...
  20. H

    Calculating Shearing Stress in a Newtonian Fluid

    Homework Statement The velocity distribution for the floe of a Newtonian fluid between 2 wide parallel plates is given by the equation u=3V/2[1-(y/h)^2] where V is the mean velocity. The fluid has a viscosity of 1.915Ns/m^2. When V=0.61m/s and h=5mm, determine: A) the shearing stress acting on...
  21. T

    Express 3x3 matrix as projection + shearing

    Homework Statement Think of the following matrix A = \left( \begin{array}{ccc} a & b & c \\ d & e & f \\ g & h & i \end{array} \right) as a transformatiom of \mathbb{R}^3 onto itself. Describe A as a projection onto a plane followed by a shearing motion of the plane. 2...
  22. M

    Shearing Modulus/Shearing Strength

    Homework Statement How much force is required to punch a hole ½ in. in diameter from a 1/8 in. thick steel sheet of shearing strength 4x104 psi. Homework Equations Shearing Modulus = Pressure/Shearing Strain Pressure = F/A Shearing Strain = DistanceSheared/Length-to-be-sheared...
  23. M

    Shearing MODULUS In PHYSICS

    Homework Statement How much force is required to punch a hole ½ in. in diameter from a 1/8 in. thick steel sheet of shearing strength 4x10^4 psi. Homework Equations Shearing Modulus = Shearing Stress / Shearing Strain Shearing Stress = F/A Shearing Strain = S/L S = Length...
  24. M

    Shearing Modulus in Physics

    Homework Statement How much force is required to punch a hole 1/2 inch in diameter from a 1/8 inch thick sheet of steel with a shearing strength of 4x10^4 PSI? Homework Equations Formula goes like this Shearing Modulus = (Force/Area) / (Shearing Length/Length to be sheared)...
  25. P

    Rotation is combination of shearing and scaling

    I have read at a lot of places that in 2D transformations rotation is a combination of scaling and simultaneous shear? What exactly does this mean & what's the proof for this?
  26. D

    Finding maximum shearing stress in connected shafts

    Homework Statement Shaft AB is fixed at point A, and has a flange attached at B. Shaft CD is fixed at D, and has a flange attached at C. The flanges at B and C are bolted together, but with bolts that are small enough to allow one shaft to rotate by 1.5^{\circ} before the two begin to rotate...
  27. U

    A question about cutting the section to compute the shearing tension

    Hello Dears! I've just registered here. It sounds nice! :smile: As I've seen in different solution manuals here in my country, there are several realizations of how to cut the section we've got, to compute the resultant shearing tension of a shear loading. For instance, as you see in the...
  28. Ranger Mike

    Why did all the high-grade flywheel bolts shear on our race car?

    High grade ARP bolts used to attach flywheel to crank shaft..all broke. race car came intoi the pits with engine running and no power to the drive wheels. we pulled off the body panels and could see the rear of the crank shaft. it turned when we turned the front pulley on the crank snout..but...
  29. C

    Greatest shearing stress in T-Beam

    1. \tau = (V*Q)/(I*t) Q=first moment of area, t=width, I= Ixx and V=shear force 3. First I found the greatest shear for to be 10Kn at point b Then I found second moment of inertia = 1360000 Now I need to calculate for Q (first moment of area) = A*y...
  30. D

    Shearing stress/force in nail

    in a question i am asked to calculate the shearing force in a nail holding a cross section together, the cross section is showed in my diagram. my problem was that after calcultions i found that the centroid of the entire cross section was the same as the centroid of the secondary piece(the...
  31. C

    Shearing and normal stress

    length: 20mm thickness = 0.5mm delta t = 100 celsius thickness of adhesive = 50 mm and a picture of a Silion on top of a Copper Questions: How to calculate the distribution of shearing and normal stress? Any helps and ideas will be appreciated.
  32. T

    Principle stresses and maximum shearing stress in a cylindrical shaft. Pl help

    Homework Statement Nevermind the rough picture, the shaft is cylindrical. Knowing that the post has a diameter of 60mm, determine the principle stresses and the maximum shearing stress at point K. Homework Equations These are equations for your reference: \sigma = My/I \tau = Tc/J Where...
  33. R

    Shearing and normal force in a beam

    In the diagram below, would the shearing force or normal force at B be zero, and why? http://users.on.net/~rohanlal/Untitled-2.jpg [Broken]
  34. R

    Maximum shearing stesses in a beam

    Are my answers to the following questions correct? Question 1 : If an I beam was to have a plate attached to the top flange would the maximum allowable shearing stress be greater at the top left side of the beam, or the bottom left side of the beam? My answer: The maximum allowable...
  35. P

    Shearing stress - timber truss

    Homework Statement member AD of the timber truss shown (attached) is framed into the 100 X 50 -mm bottom chord ABC as shown (attached - detailed view). determine the dimension 'a' that must be used if the average shearing stress parallel to the grain at the ends of the chord ABC is not to...
  36. J

    Bendingmoment and shearing force diagram

    I think i have successfully worked out the reactions, but do not know what to do in the second part where i have been asked to draw a bending moment and shearing force diagram.. Thanks, Joe. p.s i tried to attach an image of this but it is saying 15 posts or more... very weird system to...
  37. P

    Max shearing stress problem

    Hey guys, I got a problem that goes like: A shaft with a circular cross section is subjected to a torque of 120ft-lb. Its shaft's diameter is 0.750 in and its length is 15 in., determine the maximum shearing stress. I did the following: I tried to use shearing stress = Tr/J in which i...
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