What is Shear force: Definition and 104 Discussions
In solid mechanics, shearing forces are unaligned forces pushing one part of a body in one specific direction, and another part of the body in the opposite direction. When the forces are colinear (aligned into each other), they are called compression forces. An example is a deck of cards being pushed one way on the top, and the other at the bottom, causing the cards to slide. Another example is when wind blows at the side of a peaked roof of a house - the side walls experience a force at their top pushing in the direction of the wind, and their bottom in the opposite direction, from the ground or foundation. William A. Nash defines shear force in terms of planes: "If a plane is passed through a body, a force acting along this plane is called a shear force or shearing force."
This is our sample problem
find shear force and bending moment diagram
after calculations supports reactions and drawing shear force diagram we have a problem ..... Distance between F to O
TL;DR Summary: Finding maximum bending moment on a boom
I am trying to solve the problem stated in the picture below.
The answers are given.
I've manage to find the Normal and Shear Forces but I'm stuck at the bending moment.
According to my analysis the maximum bending moment is +7208,1...
At any point between A and C the point load is negative (downwards), in the shear force diagram: positive is upwards, so this slope is negative. The equation says the slope should be positive. Is this something to do with shear force sign convention?
I have to discuss the Bending moment and shear forces in cantilever and encastré beams. Does anybody know of good websites showing that is simple to understand showing. All i can find is how to calculate and bending moments and shear force digrams which don't really understand.
Can...
A cantilever beam 2 meter in length, 5KN act at point (A) of the beam. There is point x it looks like half way along the beam. how do i workout the distance of point X so work out the magnidues of Ra and Rb so i can go onto working out bending motion and shear force?ruff idea i had
1) Ra x 2...
Hello,
I am looking for some help. I have completed the question below. I will show my answers.
My answer:
I believe this to be correct. If it is not would appreciate someone letting me know so i can correct.
Now i am attempting this question:
Could anyone help, or point me in the...
Hello,
I have designed a gearbox that bolts on to a fixed engine and fixed pump. It is completely supported by them. The total mass of the gearbox and the components attaching it to the engine and pump is 7.7kg. Its centre of mass is 0.167m along the x-axis and 0.09m along the z-axis from the...
Hi all!
I have used this forum a few times and it has been very helpful, however now I am stuck. I have completed the question above however I have conflicting information regarding the Tensile and Shear force being applied to the rivet. I use the following calculation for this:
Shear Force...
Hello all
I was hoping some could shed some light on the idea of shear force on members.
I have the following simply supported beam:-
Considering only the left of the beam to just to the right of F1; my gut instinct would be to say that the shear force or failure is greatest at the...
I know that shear stress in horizontal beams has a parabolic distribution, so that the max shear stress occurs at the neutral axis. I also understand that for a beam subject to a distributed load with supports at its ends, the magnitude of the shear force is highest at the left and right ends of...
Hello,
I am having a headache to try understand a possibly simple real-world problem: efficiency (as in number of strokes/cumulative length needed) to saw steel, assuming a constant sawing length per stroke and a known steel sectional area.
I began to think about the few assumptions I assume...
If I have a catheter covered in a thin sheathe (think a cylinder, covered by a thin plastic film), how should I go about calculating the shear force it takes to unsheathe the catheter from the sheath (no torque here, just the catheter moving in and out)? I've thought about strain gauges (but...
I'm programming a game in which I'd like to simulate the real world physics of an attack using primarily medieval style weapons. Think dwarf fortress, but rather than assigning damage numbers we're calculating force or kinetic energy. Getting that much is easy enough since I can find the mass of...
1)In a flowing fluid in laminar fashion we know that it flows in planes which slides over each other, Let's take a fluid element (cylindrical) in a pipe(Radius=R) the resistive force is (stress)(cross section area of cylinder with radius 'r') acting in backward direction, now if I take Flow...
Hello.
This is a basic statics/mechanics of materials problem.
Here's an image of my work.
I've taken a course in statics before, and this is supposed to be review, but I can't seem to get the correct answers which are V_c = 75 lb, M_c = 1125 lb*ft. I've chosen the right side, and it seems as...
Homework Statement
I was asked to find the shear force diagram and bending moment diagram for this load combination...But , i have problem of getting the BMD now . i am not sure which part is wrong , can anyone point out ?
Homework EquationsThe Attempt at a Solution
MA = 5(2)(1/2)(2/3 x 2) +...
Hello
I am a bit confused how to calculate the shear force and bending moment graph for a beam under point loads, distributed loads and bending moments.
Is the discontinuous functions the best method to solve such problems?
Can anyone outline an approach?
I don't understand for example how...
Homework Statement
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problem - https://imgur.com/34yTyCAHomework Equations
I = d . b^3 / 12
tmax = (F / I . b) . (A1 . y1) + (A2 . y2)The Attempt at a Solution
It is asking for the maximum shear FORCE in the beam. Do I take the maximum value from the shear force diagram as shown in my...
The problem is to determine the shearforce Q on the hut near the ground. This is not a homework or anything like that, I'm just studying for an exam and this problem is in the book "Engineering Mechanics, Statics" By Meriam Kraige.
On another forum, I found this:
I understand the part in...
Homework Statement
I was asked to design a beam from the beginning to detailing . I encountered that the shear force for minimum links is greater than the maximum shear force , is it possible ?
Homework EquationsThe Attempt at a Solution
I have checked thru the working , it seems that...
1. Homework Statement
I have problem solving the bending moment and shear force of a conduit with a curve end. The conduit is lifted in the mid-air with 2 slings and assume it is in equillibrum.
I have attach a drawing for reference.
Homework Equations
What i know, there is a UDL somewhere...
Homework Statement [/B]
The inclined ladder AB supports a house painter (85 kg) at C and the self weight (q = 40 N/m) of the ladder itself. Each ladder rail (tr = 4 mm) is supported by a shoe (ts = 5 mm) which is attached to the ladder rail by a bolt of diameter dp =8 mm.
1) Find support...
I'm looking for a way to calculate the shear force applied to a brake pad from stopping ( a small engine brake pad stopping a fly wheel). I know shear stress is shear stress/ area , would this apply for a dynamic application as well? Would I need to calculate the force to stop the flywheel at a...
Homework Statement
Homework Equations
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Shear force is calculated at each point on the beam. Downward forces are negative, upward forces are positive.
Moments about points are calculated as force multiplied by perpendicular distance. Clockwise moments are negative. Anti clockwise...
Homework Statement
why at C . the shear force V change from -0.5 to 0.5 ? We wantg to determine the shear force at different location , and a unit force is applied at arbitary location ( measured from A) ...
Homework EquationsThe Attempt at a Solution
IMO , there's no upwards force of 1...
Homework Statement
i know this question can't be done(since the location of point where the tau 1 and tau2 are measured are unknown) , but i want just want to check whether my concept is correct or not . we know that the shear stress has formula of $$\tau = VQ / It$$ , the question want the...
Homework Statement
In this question , the 45N is acting at 0.6m from B ...
why the author put the 45N forces at D in the shear force diagram ? Is it wrong ?
Homework EquationsThe Attempt at a Solution
IMO , the 45N should be put at 0.5m from D . Correct me if i am wrong
Homework Statement
theoretically, bending moment should ends at bending moment = 0 , am i right ?
Homework EquationsThe Attempt at a Solution
Here's my sketch of SFD and BMD ,my bending moment doesn't return to 0 , which part of my working is wrong ... to find bending moment (M) , i get M...
Homework Statement
in this diagram , we could see two forces acted to left , one force acted to right , total of two forces acting to left = force acting to right .
Homework EquationsThe Attempt at a Solution
i'm wondering if the total of two forces on the left are not the same with the...
The orange thing is a gear being turned by a motor, which is intended to move the frame the shaft is fixed to. I realize the applied torque is going to create support reactions, but I can't quite figure out how to calculate the needed material strength so that the frame won't shear.
All helps...
Homework Statement
There are 2 graphs in the notes , the first represent the shear force diagram , while the secon d one represent the bending moment diagram... In the notes , we can see that the gradient of the force per meter to the right of B is decreasing ...
Homework EquationsThe Attempt...
Homework Statement
I don't understand why the sign of moment of beam at left (clockwise) and moment at the right of beam (anticlockwise) are considered as positive...
Why we can't assume the clockwise moment as positive and anticlockwise moment as negative?
Homework EquationsThe Attempt at a...
Homework Statement
http://nptel.ac.in/courses/112107146/22[/B]
in the notes, the author define upward shear force as positive (LHS) , he take downward shear force as positive as positive (RHS)?
Homework EquationsThe Attempt at a Solution
why the author didnt fix downward shear force as...
Homework Statement
in the book , i was told that when the shear force is 0 , moment is maximum . However , in this question , i found that when the shear foce is 0 , the moment is also 0 . I'm wondering is the ststemnet true ?
Homework EquationsThe Attempt at a Solution
Hi
Can someone please help me with this problem:
A beam is 16m long and rests on two supports, 10m part. the right support is 4m from the right-hand end. The beam carries a uniformly distributed load of 408 kg/m between the two supports and concentrated loads of 2kN at the left end, 0,153 tons...
I have simplified the problem down to something like a physics textbook question, although this is a practical problem where the pivot on my rotary actuator has been damaged by a faulty driver which caused the armature to ram into the endstop.
Obviously this needs better protection. My problem...
I don't get this shear force distribution stuff.
In my drawing A is sort of a free body diagram. Load W is dead center of a beam, and of course this force is supported at either end by two reaction forces.with a value of W/2.
B is a shear force diagram. For points < L/2, shear force is...
hi all
Basically I need to find the shear force and bending moment of a beam using octave. The length of the beam as well as forces and their distances are given. However the SF and BM must be calculated at every o.ooo5m. The forces can be Point Loads or Uniform Distributed Loads and there can...
Homework Statement
In the image uploaded below, a boxed shaped object is shown. It is floating in water so the forces that act on it are buoyancy and gravity. The first and the last compartments are filled with evenly distributed weight. The middle 2 compartments are empty.
Specifics are...
Hi today I was watching a demonstration of using explosives in demolition and emergency rescue and they did one where they wrapped explosive cord around a steel I beam and cut it in half then said this was a shearing force which sounded right to me but then they took a concrete post similar...
Homework Statement
Force by uniform loading = 20(5) = 100kN
Vertical component of the uniform loading = 20(5)(3/5) = 60kN
Horizontal component of the loading = 20(5)(4/5) = 80kN
vertical reaction at roller support = Vr
vertical reaction at pin support = Vp
Homework Equations
Fx=0, Fy=0...
Im struggeling with understanding this task. Yeah I'm an amateur.. My English is not that good as well. My main problem is understanding where the share forces act on this dam, if its through the centre of pressure, or if its at the bottom of the dam. Now I have calculated the share forces...
Hello Guys,
I have a disk of diameter of 150mm and thickness of 10mm which is rotating at the constant speed of 100rpm. The disk is inside water which is approximately 4-5 cm below the surface. Disk is horizontal (parallel to the water surface). Disk is attached with the shaft of the motor. At...
I'm working on a homework problem for Statics and I'm stuck. Could someone please help?Problem: Draw the internal force (N,V,M) diagrams and include all significant figures
Here is all of my work:
Resulting F from W1:
W(x) = W1
∴ F2=∫02b W1dx
eq (1) ⇒ F2 = W1⋅2b
x1 = (F1)-1 ∫02b W1dx =...
Can someone help me with determining the free body force diagram, and hopefully I can go on from there.
Homework Equations
M = F.dI found T = 500N
The answers are shear force = -62.5N , Moment = 64.4 Nm , Tension = 500N
Homework Statement
a viscous fluid with viscosity η flows through a circular vessel of length L and radius R under a pressure difference of P. Assuming the flow is laminar, calculate:
a)the force on the walls of the vessel.
b)the net force on the vessel.
Homework Equations
Hagen-Poiseuille...
< Mentor Note -- thread moved to HH from the technical engineering forums, so no HH Template is shown >
Hi, I'm having problems with the shear force question attached. I've attached the solution as well.
I'm looking at 2. (b), I have the 0 > x > 3 bit, but I'm struggling with the 3 > x > 4...
Hi everyone here is the question I'm having trouble with. included is my attempt and the question.
1. The Reactions at A (Assuming the boom weight is negligible)
2. The shear force and bending moment along the boom length and indicate the point of maximum bending moment.
3. The maimum bending...