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.
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...
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...
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...
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...
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...
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 ) ...
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...
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...
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
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...
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...
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...
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...
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...
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...
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...
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.
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...
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...
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...
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...
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...
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)...
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?
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...
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...
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...
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...
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...
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.
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...
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...
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...
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...
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...